1966 mustang speedometer gear. 19 (I looked this up) / 1000 = 20.
1966 mustang speedometer gear 11. 19 (I looked this up) / 1000 = 20. When you pull the driven gear/cable off, you should be able to look inside and see what color the drive gear is on the output shaft. . The car originally had a 3-speed manual with the speedometer cable coming in on the drivers side. Jun 6, 2003 · A C4 cable is the ticket. Without a correct and properly functioning Speedometer Cable Gear Retainer Clip your speedometer will not read correctly and the speedometer gear will rattle around inside the transmission, this could cause damage to the internals of your transmission. I'm running 245/60R15 tires and 3. 1 Bearing Retainer DK296-1 &1A 37 Speedometer Drive Gear page 5 2 Bolt DK296-2 38 Rear Bearing DK296-38 & 38A 1966-69 Falcon 289, 302 1966-69 Mustang, Cougar 390 Shop for the best Speedometer Drive Gear for your 1966 Ford Mustang, and you can place your order online and pick up for free at your local O'Reilly Auto Parts. Jun 5, 2012 · National Parts Depot's catalog has a tutorial about speedo gears and they stock the gears themselves. 083, 16 x 1. Mar 5, 2013 · Anyway, two separate calculators recommended 20 tooth speedometer gears. 50 rearend gears. $55. On to the http://www. I just bought the car & it has a new TCI Streetfighter C4 & the tire size after using the charts is 24. 7 Tooth - Black. Most mustang vendors carry the gears. A 6-tooth, pink drive gear is in the middle. it will tell you which gear you need based on the size tire, gear ratio and transmission you are running. Today NPD only sells 15-21 so you are somewhat limited. 1965 Mustang 289 V8 (exc. T10 Speedometer Drive Gear Kit for Mustang / Falcon Mustangs, Etc. Apr 15, 2016 · The rotational speed of speedometer cable which drives the speedometer head works by means of a drive gear in the transmission and a driven gear on the end of the speedometer cable. Buy your Mustang Speedometer Gears At CJ’s! Regardless of which size speedometer gear you’re in search of, CJ Pony Parts has a vast inventory to choose from. These signal generators produce approximately 16,000 pulses per mile (PPM). The speedometer cable works with the onboard computer to give you accurate readings. Jun 19, 2010 · here is a nice link for a speedometer gear calculator. 289 w/C4 1) stock 14" styled steel rims with stock tires Classic Industries offers 1966 Ford Mustang Speedo Cables and 1966 Ford Mustang Speedo Gears. This speedometer driving gear is black in color. 17, 18, and 20 ought to do it. 0L 165cc AFR Heads TFS Stage 2 Cam, T5, 8. Ken 1965 – 1966 Ford Mustang Installation Manual . 63 it says I travel 819 revoltions per mile. If not just count them. 12. Jump to Latest 1966, hardtop, 289, original 3 speed, on the road and fun to drive. 11) Aug 14, 2008 · Is there an easy way to figure out what speedometer gear I need? I've changed tire size and rear end gearing. 00 1966 Mustang 289 V8 with Borg Warner T-10 4-speed transmission . Transformed 2017 Jun 4, 2010 · Hi, I have a 1966 Fastback with a newly rebuilt 289 (original motor). It did work perfect with the 3 speed. Now attach a speedometer cable to the driven gear and you see the answer. 2. Buy a new Ford Speedometer Cable Gear Retainer Clip for your 1965-1998 Mustang from CJ Pony Parts. May 8, 2020 · No guessing with this Mustang Speedometer Gear Calculator! Close. Speedometer gears attach to the end of the speedometer cable and are inserted into the end of the transmission. amazon. Product#: 17271B 1960-04 Ford, Mercury; Speedometer Driven Gear; Manual/Automatic; Type 3, RH Rotation; Wine; 16 Teeth. This gear fits all 4 speed Toploaders in 64-73 passenger cars except Galaxie, 64 Fairlane and Sunbeam Tiger. 30 21 – T-5 maNual TraNS. Exact reproduction of original made using the original blue prints. Jul 7, 2015 · So you'd need a speedo gear with more teeth. That's why a high-quality speedometer is a must for any Mustang build. 79 rear, 215/65r15 tires. Around 19% difference. At this point, Bentley re-installs the emergency-brake Jul 6, 2017 · Aside from your comment that the speedometer is "sometimes" correct this really sounds like you have the incorrect gear on your speedo cable. Everything I see is for the top loaders, are they interchangeable? I have a new speedometer cable, and speedometer too. There should be a number stamped on the gear such as 17 or 18 indicating number of teeth. Check out Alf's Mustang Parts on Amazon www. Jun 2, 2021 · Need to change your speedometer driven gear on the transmission side of your speedometer cable. 2 That means you'd need a driven gear with 3 more teeth. com/shops/mustangalfThings I used in this video. 25, 4. Less teeth, the cable moves faster, the magnetic clutch in the speedo turns faster, and the needle moves higher, indicating faster speed. 68 inches in length, this speedometer cable is a direct fit replacement, manufactured from CJ Classics's highly respected production. Made from high temperature grade nylon plastic. Jun 17, 2015 · For your C4 auto, choose a Right-Hand (RH) rotation gear! And as KevinC suggests, might as well get a selection of gears. Be aware that some transmissions will have different driven gear housings depending on the tooth count of the driven This is a retrofit gear to allow the speedometer to function with 3. 1 3/8 inch diameter. 060, so 311 Jun 22, 2009 · 1966 Mustang speedometer gear change Jump to Latest 6. May 9, 2013 · It's been almost ten years since I had to buy a speedometer gear for my car. 25 rear gears behind a wide ratio trans. 50 gearing works great with a T5. Fitment 1990-1995 FORD MUSTANG SPEEDO GEAR KIT FOR T5 W/ 3. special) with Borg Warner T-10 4-speed transmission before 11/23/64. His name is Chris Ingrassia. 1966 Mustang Sprint 200 "Oliver" factory fog lamps, factory rally pac, off the road for restoration. Sep 23, 2015 · There is a real good video on YouTube about speedo's and resetting them. Mar 7, 2014 · The speedo gear is held on to the end of the cable with a C ring. Jan 14, 2025 · 1965 Falcon 289 V8 with Borg Warner T-10 4-speed transmission before 11/23/64. 6% change (3. Free shipping on orders over $300, fast delivery & everyday low pricing! Apr 8, 2008 · The following is from NPD's new catalog, supposedly new exact length cables coming out this spring 65-66 260, 289, 4sMT, 64 15/16” 65-66 C4, 58 13/16” Ford Mustang speedometer cables are essential to the transmission system, ensuring that your speedometer displays the correct information. Its usually a colored gear and the number of teeth on it are different on each color. Apr 6, 2013 · TCI® now stocks the most popular speedometer gears. The gear itself depends upon your rear axle and tire sizes. It’s bolted in place with four 9/16-inch bolts. 25" rear, 2. Unbolt the small retaining bracket at the transmission, and then just pull the speedo cable and gear out. 73 and 4. 1966 Mustang 2-Door Coupe Engine: 1980 302 bored 0. Lokar's top quality speedometer cable features machined aluminum fittings and a premium housing with a specially extruded liner to extned the life of the cable. Now the driven gear turns twice as fast as the driving gear. 8 3. 73LS rear w/disc, Granada front discs, Arning/Shelby drop, Vue EPAS 67/68 Ammeter to Voltmeter upgrade with how-to 1960-04 Ford, Mercury; Speedometer Driven Gear; Manual/Automatic; Type 3, RH Rotation; Yellow; 18 Teeth. It’s located far from the rest of the transmission system, so the cables are crucial in communicating the information. No matter if I have a right hand speedo gear or a left hand speedo gear my speedometer only reads in reverse. Return to Speedometer Gear Calculator 1967 - 1973 Mercury Cougar (and Ford Mustang) Speedometer Gear Calculator. You'll need to pull out the gear in your tranny and count the number of teeth. 25 = . A new speedometer gear will also fix this as well. Or search for 1966 Mustang speedometer gear reset and you will get lots of videos to watch. com/mustang-speedometer-gears/c/60190200/If you're looking to correct the speedometer on your Mustang, CJ Pony Parts has created a tut Speedometer Gear Ratio Adapter, Straight Style #17294-1A. drivEN GEarS auTO TraNS. If you have a 6 tooth or 7 tooth the driven gear is listed. It was either him or The MustangMedic. Thanks. I will need new speedo gears since the new trans is different and the new rear gears will be 3. Do not use excessive force to tighten. As an Amazon Associate I earn from qualifying purchase 1990-1995 FORD MUSTANG SPEEDO GEAR KIT FOR T5 W/ 3. A 16-tooth, left helix driven gear with orange tip is on the left. Since the gear tooth pitch is slightly different than OE, the service life of this gear is limited to less than 25,000 miles. It has 7 teeth with a left-hand helix, 1-3/8 inch inside diameter, 1-13/16 outside diameter and is 11/16 inches thick. May 11, 2011 · There is a gear on the output shaft of the transmission that spins the gear on the end of the speedometer cable. HTH--Kyle Jul 11, 2018 · Remove the speedo cable from the tranny and look at the driven gear. Mar 26, 2012 · Customer Testimonial video playlist:https://www. After that, you must run a reducer that was common to Fords with 3. The speedometer needle is jumping all over the place and it runs about 10 MPH fast. Replacement Type 3 speedometer driven gear for various 1960-2004 Ford and Mercury models. It did not snap off inside. 55 17 20 – 3. 16 tooth driven gear should do it. I think I chose the right one at the time. If you suspect the gear may have been changed previously, you can also measure your tire diameter and have another car clock your speed on the freeway to calculate what your drive gear tooth count is. Apr 5, 2009 · 1966 Mustang Speedo Gear Change. If you've made large modifications, like changing your rear gear ratio, then you may need a new speedometer gear instead. 80 rear end. supercharged 302 currie 9 inch, 5 speed. They also sell a small converter box that attaches between the trans. Do a search! There are charts out there that will help you pick out the right speedo gear. Most are 6, 7, or 8 teeth. Jan 16, 2011 · If the speedo gear is located on the pass side which it should be an a T-10 then a RH twist would be correct. Apr 24, 2012 · It's rare that the cable itself go bad, it's usually the gear that goes bad, and since both the odometer and speedometer depend on the cable turn to work they fail to work simultaneously, and also check that if the speedometer is giving an unacurate reading it's usualy caused by the use of the wrong speedometer gear, this can be affected by wheel size, rear axe ratio, and a couple other things Feb 24, 2020 · Mustang Speedometer Gear Calculator - LMR. Now, look at the gear and count how many teeth it has. Unless the circlip is damaged in some way it will be fine as a spare, or even to put back on. 2 speedo gear. Black 7 Tooth Speedometer Drive Gear. Mar 24, 2010 · I have a 1966 mustang 289 was 3 speed manual, now 4 speed toploader. I am trying to locate the correct speedometer drive gear, Ford part number C6ZZ-17285A for the Borg Warner T10. Is your speedometer cable on your 1964-1966 Mustang worn or torn apart? Then make sure you replace it with the highest quality replacement possible by purchasing this 4-Speed Concours Speedometer Cable C5OZ-17260-A from CJ Classics. 8" axle It's just as valid with an 8" or 9" rear. drivEN GEarS (17285) (17271) Hurry up and order this brand new Type 3, 23-Tooth Speedometer Driven Gear for your 1965-1998 Automatic or Manual Transmission Mustang from CJ Pony Parts! This Type 3 23-Tooth Speedometer Driven Gears is made to be used with righthand rotation. View All Wheels; 5 Lug Conversion; 5. These right hand rotation gears were used on both automatic and manual transmissions with drive gear access holes on the driver side of the vehicle. Looked at driven gear on speedomter cable now & it's an 18. In my opinion anything more than 3. I have turned to the Shelby Forum since the 65/66 Shelbys share a common transmission. I believe that reproductions of the driven gears are only available in black. com/playlist?action_edit=1&list=PLU4Pb1p041pCZDCCT9ZNwZ32712TqD6fbMustangMedic Ford Mustang Search Re Jul 15, 2008 · 1966 Mustang- speedometer is about 13-15 mph below Speedometer is about 13-15 mph below what it should be. Shop Speedometer Gears and Related for your classic 1965-1973 Mustang at NPDLink. The P205 is larger than the factory original tire. May 11, 2004 · Using this combination, and ASSUMING no one has previously changed the speedo gear, you should be able to calculate what the drive gear is. Sep 3, 2019 · 1965 Mustang Convertible 200cid I6, 3spd Manual (Soon to be swapped for a '65 Date Coded C4!) 1966 Mustang Sprint 200 Registry Owner/Moderator 1966 Mustang Sprint 200 Convertible 200cid I6, C4 Auto 2007 Mustang V6 Convertible w/ Pony Package MCA#70001 Getting Ready for the 2020 Melbourne, FL MCA Nationals! Speedometer Driven Gear Calculator at The Definitive 1967 - 1973 Mercury Cougar Parts Source Speedometer Driven Gear Calculator for 1967 - 1973 Mercury Cougars and Fords Mustangs Classic Industries offers a wide selection of Aftermarket Gauge Sets for your 1966 Ford Mustang. Our Mustang speedometer gears are inexpensive and Mar 13, 2002 · Now make the driven gear half the number of teeth as the driving gear. Add to Cart. ), T5 Trans, Hydraulic clutch, power brakes, Front granada disc brakes, Aluminum Radiator, Electric Fan, HEI distributor, Headlight Relays, EZwire harness, New fuel tank, fuel lines, brake lines, Restored gauges, Shelby drop to many to list. View all applications (2) $4. Prize up the circlip, slide off the old gear, and replace with the new gear and new clip. 30:1 rearend gears. I did something stupid which dropped the clip and gear into the hole. Like this: Mustang Speedometer Driven Gear Type 3 19-Tooth AOD/AODE Automatic Transmission | CJ Pony Parts Jun 28, 2024 · Find many great new & used options and get the best deals for 1965 1966 1967 1973 Mustang 3 Speed / Automatic / T-5 Speedometer Gear 16 Teeth at the best online prices at eBay! Free shipping for many products! Jul 10, 2018 · Speedometer Cable Clip. Npd has them available as do most Mustang parts locations and they usually have a chart in their catalog to help you figure out your tooth count. 73 REAR GEARS OUTLAW FOX SALE 64 65 66 Mustang Falcon T10 Speedometer Drive Gear Kit 1964 1965 1966 Ford 17285 Nov 3, 2013 · The clip holds the gear on quite securely. 89:1, 3. 11) Return to Speedometer Gear Calculator 1967 - 1973 Mercury Cougar (and Ford Mustang) Speedometer Gear Calculator. 3L, Original owner) (C-4 Auto rebuilt transmission, power steering, manual drum brakes: F&R 9") (Single exhaust, 7. 328 Closest gear would be 17 tooth, type 3A. From there, in goes the Gear Vendors Under/Overdrive unit itself. Nov 9, 2008 · On my 66 mustang I installed new 3. Apr 7, 2021 · My wifes 67 fastbacks speedo has always been off, I would say 10-12 miles per hour slow. The change from 3:25 to 3:50 is a 7. Multiply 16 x 20% = 3. 1966 Ford Mustang Parts | 17271B | 1960-04 Ford, Mercury; Speedometer Driven Gear; Manual/Automatic; Type 3, RH Rotation; Wine; 16 Teeth | Classic Industries Jun 12, 2022 · The speedometer gear on the four speed transmission is simple to install. 80, but the rest is OK. com. This is what I have. Rear end is 2. Actually the 3. Dec 28, 2011 · Early 1967 Coupe I6 restomod conversion Completed: I6 to 302 conversion (suspension, 8" rearend etc. 73 REAR GEARS OUTLAW FOX SALE 64 65 66 Mustang Falcon T10 Speedometer Drive Gear Kit 1964 1965 1966 Ford 17285 NOS 1965 1966 Ford Mustang 289 Speedometer Driven Gear C0DD-17271-A. Used to get those gears at the ford dealer. 27 16 19 21 3. Auto, 3 Sp Manual, T5 & TKO. the speedo gear on the transmission end of the Order a Type 3A 20-Tooth Speedometer Driven Gear for your 1965-1973 Mustang with a 4-Speed Toploader Transmission from CJ Pony Parts. Ive heard that they are quite rare, but have never looked for one myself. 5" and 8. Buy this Type 3 17/18/20/21-Tooth Speedometer Driven Gear Kit for your 1965-1998 Mustang with an Automatic or Manual Transmission from CJ Pony Parts. This Gear Set is designed for Mustang owners that have changed the rear gears in their Mustang. Jul 21, 2014 · I had to use the "old" driven gear when I put everything back together. I have no idea why it will only work in reverse with either Apr 9, 2012 · I currently own a 66 Mustang with a 289-2V with a Borg Warner T10 4 speed transission. DRIVEN gear attaches to the end of the speedo cable and slips into the tranny. Dec 1, 2018 · 1966 Mustang Hardtop 200 Inline 6 - Arcadian Blue - AT Thermactor - 6R07T213966 - San Jose projected build date June 11th 1966 - DSO 71 1966 Mustang Convertible 289-2V - Vintage Burgundy - AT AC PS PT DB - 6F08C109403 - Dearborn projected build date September 9th 1965 - DSO 36 When you change the rear end gears in your Mustang you will need to recalibrate your speedometer either by installing a new speedometer gear if you have a 83-95 Mustang, a speedometer re-calibrator (SpeedCal) if you have 96-04 Mustang or a Ford Racing speed changer if you drive an 05-up Mustang. Pulled the driven gear off the cable tonight and it has 17 teeth. It can be removed and replaced in less than five minutes. If you're just worried that your speedometer isn't giving you an accurate reading, then you may need a speedometer gear. Popular Transmission Speedometer Gear Tooth Counts Transmission Drive Gear Driven Gear TH350 (Chevy) TH350 (BOP) TH400 200-4R 700R4 (4L60) C4/C5 C6 AOD 904 727 Feb 14, 2015 · To make that happen Ford offered speedo gears with 15-24 teeth. 80 to 3. 55 gears in rear end with new tire/wheels 235/60/15, The speedometer read to fast so I changed out the speedometer gear with what I thought was the correct one. This clip holds the speedometer gear in place and accurately reads the MPH of your Mustang. 25 x 780. 79 ratio. click on the house icon to see my garage page with build info. Nov 5, 2009 · 1966 Mustang Coupe. & up close pics of while he sets it all back to 00000. I assumed my 1972 C4 has 8 drive gear teeth. This is on my 69 Mach 1. SpEEdOmETEr drivEN GEar TEETh drivE GEar TEETh axlE raTiO 6T 7T 8T 3. Feb 3, 2019 · However, after putting in the original gear, the speedo works but the needle bounces quite a bit. Be aware that the speedo gear is not the same design as for the toploader. Jump to Latest 1966 Mustang Sprint 200 Registry Owner/Moderator 1966 Mustang Sprint 200 Convertible 200cid I6, C4 Auto May 20, 2021 · That is definitely a much needed improvement over the 2. 2. So that is about 10% low. I do have smaller diameter tires (25") and a 3. 25 ratio rearend. 25 / 3. com 68 Coupe, 93 5. The driven gear is located in a removable housing usually in the tailhousing of the transmission. 1968, hardtop, 200, 3 speed, and back on the road. 1965-73 Mustang (and other Ford) Speedometer Drive Gear for inside Ford 4 Speed Top Loader Transmission. 55 x 773 x 7= 19209/1000=19. The gears are color coded to help you recognize the tooth count. 10. Count the number of teeth on your current speedo gear. My trans guy asked why, as mine plugged right in (66 coupe). After much searching, I found a web page that actually listed the calculation: Buy this Type 3 17/18/19/20/21-Tooth Speedometer Driven Gear Kit for your 1965-1973 Mustang with an AOD or AODE Automatic Transmission from CJ Pony Parts. com! Free shipping over $300, fast delivery & everyday low pricing! Nov 30, 2004 · I need to know what speedo gear goes into the trans on a car that has a 3. So what would I need for the following: 1966 Mustang, stock 2. Here is my problem. View All 1979-1993 Mustang; Wheels. Looking in the Ford parts catalog for 1966 it says that a Mustang sized tire (actually only 25. 8 x 3. 923. This is also an OEM replacement part licensed by Ford for superior Jan 29, 2017 · I presume you're going faster than the speedometer indicates? Use your GPS and go for a drive on the interstate at 60 MPH (or shat ever) on the speedometer. This is a complete kit that will correct your speedometer reading. A P195 75/R14 is the closest that you can to the correct size and ride height on a 65 or 66 when using P-metric sized tires. 1966 MUSTANG Convertible (I6, Sprint 200, 3. 50 - 3. 6K views 4 replies 3 participants last post by danielf Jul 9, 2009 1960-04 Ford, Mercury; Speedometer Driven Gear; Manual/Automatic; Type 3, RH Rotation; Wine; 16 Teeth. 08 – 18 20 3. 083 = 17. 65 mustang. Changes to wheel and tire size alter the speedometer reading because Buy part #17292-1 Speedometer Driven Gear Retainer Clip for your classic vehicle from National Parts Depot. SKU: C5DZ-17285-A. turbocoupe (10310) 99. drivE GEarS maNual TraNS. I did the calculations of 3. 0769, or nearly 8%. 70ish would make 1st gear more like a granny gear in an old truck, which would render it useless. Which speedo gear is determined by your tire hight, rear gears, and # of teeth on the driven gear in the T5. Now working on returning the cable for some of my $$$$ back. Its quality construction will undoubtedly demonstrate lasting durability for miles to come. Additionally, I used this formula: (drive gear teeth)x(Axle Ratio)x(Tire revolutions per minute) / 1000. DRIVE gear is part of the output shaft, either machined in, or as a replaceable gear. If your GPS says 65, you need to change the nylon gear by a ratio of 60/65 = 0. Aug 13, 2002 · HEK-AD decodes to a 1966 BW T10 (duh!), including the GT350's. rounding off you need an 18th tooth:bigthumbsup '66 Ragtop, vibrant red, 289-4V, 4-speed toploader Aug 10, 2005 · There is a plastic speedo gear at the end of the speedometer cable, where it goes into the transmission. 73 18 21 – 4. Mica Merlot with black stripes, Deluxe interior, 302 4V, 4-speed toploader, 3:70 9" rear end. Today we will walk throug transmissions and 1996-1998 Mustang GT with T-45 transmissions. Classic Industries offers 6 Gauge Dash Panel Sets, 5 Gauge Sets, 3-In-1 Gauge Set, Digital Gauge Sets, 5" Gauges Sets, Dash Gauge Assembly, 2 Piece 5" Quad Gauge & Tach Speedometer Combo Sets, 5" Quad Gauge, 4-3/8" Speedometer & Quad Gauge Sets, and 4-3/8" Speedometer/Tach & Quad Gauge Sets. Feb 7, 2006 · (Indicated Speed / Actual Speed) X current speedo gear tooth count = required driven gear tooth count John Goettsch - My First Mustang - 1966. Revision: May 3, 2013 Attach the signal generator to the transmission speedometer gear housing (where the speedometer Mar 28, 2003 · To correct, you either add teeth to the DRIVEN gear or subtract teeth from the DRIVE gear. I tried a few different charts & I assume I have a 7 drive gear, so some says 20 teeth driven gear to 23. $42. This speedometer gear is most commonly used on cars with 2. Gift Ideas & Accessories; 1965-1966 Mustang Speedometer Cable. Red Black White Red: ----- Power (to Red wire of the speedometer harness) Order a Type 3A 21-Tooth Speedometer Driven Gear for your 1965-1973 Mustang with a 4-Speed Toploader Transmission from CJ Pony Parts. Lets say you have 18 teeth now and you found your that your speedo reads low by 4 mph at about 40-45mph as mine did. Jul 14, 2018 · '65 Mustang Speedometer Gear. 7% positive; Seller's other items Seller's other items; Contact seller; US Attach the signal generator to the transmission speedometer gear housing (where the speedometer cable originally connected). Now I need one for the '66. Note: Drive gear refers to the gear that is on the transmission output shaft. The highest number of teeth available on a Ford speedometer drive gear is 21. youtube. There are different tooth counts available for both which Ford used to calibrate the speedometer for the vehicles rear axle ratio, tire size, etc. 25 rear in it with stock tires. Shown is the speedometer port on the driver’s side of the planetary transmission. I'll probably buy both a stock gear, and one for the bigger rims. Let's say it has 16 teeth. 5" diameter) with a 3. Jun 8, 2011 · I popped $100 for a "AOD conversion speedometer cable". 1966 Mustang 2+2, 289 c code/c4, Edel 600cfm/performer carb, intake/spacer,Comp XE250H Cam, pertronix igintor w/ coil, tri-y Oct 9, 2024 · Here's an old Ford Racing speedometer gear chart: Speedometer gear usage chart—7. 80:1 Drive gears are also made of colored nylon. I replaced this with a 4-speed toploader which has the speedo cable coming in on the passenger side. It is plastic and easily replaceable. 28 Thus, I'm going with the 20 tooth speedometer gear. 3. 11:1, and 4. 45/3. May 3, 2011 · When swapping a T5 transmission out of a fox body Mustang into an early Mustang (65-66 in my situation), the speedometer drive gear will likely need to be replaced in order to maintain an accurate speed displayed on the dash speedometer. cjponyparts. Jun 22, 2004 · Says 80. 00 rear end needed a 17 tooth gear for either a C4 or a 4-speed. 10 rear end gears. 1965-1973 Mustang. 83 ratio, P205/75R14 tires) (Candyapple Red exterior, Red SPEEDOMETER GEARS, CABLES AND MICS PARTS; 1964 to 1973 Mustang. Mar 19, 2010 · Chris, Assuming your C4 had an 8-tooth drive gear and based on your tire size and axle ratio, you need a 18. I've tried 4 or 5 different gear calculators and they all say it should be a 17 tooth driven gear. 91:1, 4. Jun 30, 2006 · Speedometer-gear calibration and selection should be an integral part of any changes to your Mustang's chassis or driveline. May 29, 2019 · If the speedometer was fairly accurate with the old rear axle ratio, and you have the driven gear, on the speedo cable housing, the number of teeth will be marked on it, or you can count them. C4, so assuming 8 drive teeth, 2. 10 20 – – 4. Discontinued. 0 9. Here's a picture of all three types. The gear is held on with a small metal clip that you can pry off to change the gear. This 7' cut-to-fit speedometer cable is designed to work with This is a popular option among a lot of late model Mustangs in order to get your Pony out of the hole a little quicker. This unit uses its own cable assembly, and the factory C-4 speedometer gear. jazzbo Aug 7, 2012 · If your speedometer is reading 10 mph too high and you have an 18-tooth drive gear, you need a 20-tooth drive gear. If pulling the cable it doesn't set it free you may have to use a flat tip screw driver and gentle pry between the cable retainer and the tranny. and the end of the speedo cable if you find that just changing the speedo's gear tooth count isn't enough to get your speedo calibrated. 1966 Mustang 289 V8 with Borg Warner T-10 4-speed transmission. Mustang; 1979-1993 . Each car has its own gear for the corrosponding rear end. Rear End Axle Ratio (ie 3. 17. A 17-tooth, right helix driven gear in green is on the right. Obviously, the gear tooth count is Aug 19, 2019 · Since your speedo is reading 5mph fast, divide 5 by whatever speed it's fast at, then multiply the teeth on the driven gear by that , plus 1 Example - 5/60 = . View all applications 1965-1966 Mustang. wuuzhemtuomwljgqexwatubyecqvxchjkgyndygzkhnversprymudjauuektjfklecmawdac