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Ford Racing 4.10 Gears and Install Kit (86-09 V8)

30 Reviews
Our Price

$259.99

  • Item #100577
  • MPN# 100577

  • Market Price $319.99
  • You Save 19% ($60.00)
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Customer Photos
Features
  • Money Saving Combo Kit
  • Ford Racing 4.10 Gears - 8.8"
  • Motive 8.8" Rear End Installation and Bearing Kit
  • 1 bottle of Ford Racing Friction Modifier
  • 2 quarts of Royal Purple Max Gear 75w90 Gear Oil
  • Fits 1986-2009 V8 with 8.8" solid rear axle
Description
Improve ET's and low end torque. Are you looking to get more low end grunt off the line and lower ET's at the same time? Then look no further than installing a set of steeper gears in your Pony. This Ford Racing Ring and Pinion Gears are perfect for street, road, or race use.

Complete Kit. This Ford Racing Gear and Installation Kit comes complete with all the components needed to swap out your ring and pinion gear. It includes Ring gear, Pinion gear, 1 bottle of Friction Modifier, 2 bottles of 75w90 Gear Oil, gaskets, seals, shims, bearings and all the required hardware.

Legendary Ford Racing Quality. When you're adding performance parts to your Pony, you can't go wrong by installing parts from the folks that know it best. Ford Racing's legendary quality ensures years of hassle-free use.

Recommended Upgrade. Changing the rear axle gear ratio will throw off the calibration of your Mustangs speedometer, but a Speedometer Gear, a Ford Racing Speedometer Recalibration Tool or a Bama SF3/X3 Power Flash Tuner is a quick and easy way to fix this issue.

Application. This Ford Racing 4.10 Rear Gear and Installation Kit is designed for use with 8.8in solid rear axle equipped Mustangs, including the 1986-2009 GT, Bullitt, Mach 1, Shelby GT500 and 1994-1998 SVT Cobra. It will not fit the 1999-2004 IRS equipped Cobra Mustangs.

Technical Note. Installation costs will vary, but a good rule of thumb is between $250 and $300. Be sure to work with a reliable shop that you trust for installations. You can also save money on your installation labor by having your Trac-Lok rebuilt at the same time as your gears are installed, see drop down option above.

Mustang Fitment: 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Details

What's in the Box
  • (1) Ring gear
  • (1) Pinion gear
  • (1) 3.8 fluid oz bottle of Friction Modifier
  • (2) one quart bottle of Royal Purple Max Gear 75w90 Gear Oil
  • Front & Rear Pinion Bearing
  • Pinion Seal
  • Carrier Bearings
  • Carrier Shims
  • Differential Bearings
  • Crush Sleeve
  • Pinion Nut
  • Cover Gasket
  • Ring Gear Bolts
  • Brush
  • Gear Marking Compound
  • Loctite
Installation Info
Fitment
  • Foxbody - 86, 87, 88, 89, 90, 91, 92, 93
  • Cobra - 93, 94, 95, 96, 97, 98
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09
  • Bullitt - 01, 08, 09
  • Mach 1 - 03, 04
  • GT500 - 07, 08, 09

Most Helpful Reviews View All

Overall Rating 4.9/5
5/5
Perfect gear for 0-60 badassery!

This has to be the perfect gear for the S197, as it pulls super hard in all gears but still allows for somewhat decent RPM's at highway speeds. Combined with a Steeda stage three suspension kit, the vehicle

Read More
Helpful (7) (0)

5/5
really helped top end out

i have a auto but im really happy with the gears down low help with my long 2nd and it dont fall on its face in 3rd as of wheel spin no more then stock 3.27 i drive about 70% hwy n 30% city n iv only dropped

Read More
Helpful (4) (0)

Customer Photos (7) View All

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Q & A (6 Questions, 6 Answers) Ask a Question

Fit I want to be sure that fit on my svt cobra 99? The ford dealer said its the same for a svt cobra 99 that a gt v8. But you write on the fit spec that not fit there??? I want buy a 4.10 kit gear now

Stephan99svt Year: 1999 Model: Cobra

Question Resolved
Good Question (0) (0)
  • You have a 8.8 inch rear all your doing is changing the ring and pinion and bearings and oil. When the rear is set up it is different each time with the shimming to get the proper back lash. Unless you have the tool to do this take it to a go shop and have it done. 400 to 500 dollars.

    Helpful (1) (0)

    Best Answer

    fasteddie64 Year: 2006 Model: GT

    Top 1 Contributor

Show 1 more answer

too speed I wanted to know how everybodies top speed was if its like 5 mph lower thats fine

Yetismustang Year: 2008 Model: GT

Question Resolved
Good Question (0) (0)
  • Adding the new gears will most likely drop your top speed 10-20 mph. You'll certainly get to your top speed quicker, but if you still want a reasonable number, you might want to consider the 3:73 or 3:55 gears, especially if it is a daily driver.

    Helpful (0) (1)

    Patrick92 Year: 1992 Model: Other

    Top 10 Contributor

Show 1 more answer

4.10 fuel mileage How much of an effect does it make on the fuel mileage in an05 GT mustang to go from 3.23.to 4.10's with an automatic

BeauandStacisGT Year: 2005 Model: GT

Question Resolved
Good Question (0) (0)
  • 10-20%. If you are worried about fuel mileage, don't do it. But if you want your Mustang to perform better, change the gears.

    Helpful (1) (0)

    Best Answer

    88GTConvertible Year: 1988 Model: GT

    Top 250 Contributor

Show 1 more answer

Reviews (30) Write a Review

  • 5 Stars .90 90%
  • 4 Stars .10 10%
  • 3 Stars 0 0%
  • 2 Stars 0 0%
  • 1 Stars 0 0%
4.9

out of 5 stars

29 Customers Recommend this Product

Installation Time:Weekend

Installation Cost:$250-$500

  • Performance Gain: 4.7 4.7/5
  • Fit: 4.833333 4.8/5
  • Bang For Your Buck: 4.833333 4.8/5
Filter By Sort By
  • 5/5 Yes, I recommend this product

    December 21, 2013

    Perfect gear for 0-60 badassery!

    This has to be the perfect gear for the S197, as it pulls super hard in all gears but still allows for somewhat decent RPM's at highway speeds. Combined with a Steeda stage three suspension kit, the vehicle has no wheel hop so I know I'm putting every lb of torque straight into the ground. Punching it even at around 25-30 MPH spins the tires and sends the vehicle in a horizontal direction (can't say that for the stock 3.55's.) I have an automatic and during hard acceleration from the stoplight I can now choose whether to floor it and go sideways or feather the pedal for a quick smooth takeoff. Either way, the vehicle is much more fun to drive but I'm sure a new set of tires will be in order soon! I'm the kind of driver who is addicted to fishtailing around every corner, so these gears were exactly what the Dr. ordered. I had a local speed shop install them and there was a bit of gear whine at first, but after about 100 miles, they quieted down. Had the shop changed out the diff oil after about 200 miles to clear out any metal particles from the break-in period. Overall - If smokey burnouts, donuts, and attracting attention from bystanders (I.E. law enforcement) are not your thing, definitely go with 3.73's, otherwise order up and have some axle twisting fun!

    korstellan

    Year: 2007 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 3 San Antonio, TX, USA

    Helpful (7) (0)

  • 5/5 Yes, I recommend this product

    December 01, 2013

    really helped top end out

    i have a auto but im really happy with the gears down low help with my long 2nd and it dont fall on its face in 3rd as of wheel spin no more then stock 3.27 i drive about 70% hwy n 30% city n iv only dropped 1 mpg well worth it tho @ 60 im about 2350 rpmwith the 4.10 from my 1850 rpm @ 60 with 3.27

    fast04stang

    Year: 2004 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 1 wi

    Helpful (4) (0)

  • 5/5 Yes, I recommend this product

    October 14, 2014

    Wakes up your S197!

    I have a for the most part stock 2008 GT. It came with the factory 3.55 gears.All my other mustangs had 3.73s. I was skeptical about the 4.10s. But going from 3.55 to 3.73 is a waste of time and money. Checked out YouTube videos, the AM comments here and hit up Mustang forums and majority said the 4.10s with the 5 speed are perfect. So I went with this kit. Awesome investment, the kit has everything you need for the upgrade. Just remember you will need a tuner! After completion, I took it out and it was a whole new car. Acceleration was much better, and no need to downshift to pass someone. These gears keep the car in that powerband range and is responsive from whatever gear you were in. Highway driving not bad as I did see from the videos and now in person, 70mph, rpms @ 2400-2500 range, not bad. No regrets whatsoever! Excellent kit and price. Thank AM!

    VTL1180D

    Year: 2008 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 3 New York, NY, USA

    Helpful (2) (0)

  • 5/5 Yes, I recommend this product

    December 22, 2013

    bring it on !!!!

    The ford racing 4.10 gear is my best move so far ..... excellent return for the money invested .... my car feel like i just put 50horses on it .... $$$ bit more on the highway ..but .... camaro assasin lol .... if you're hesiting between the3.73 and 4.10 go the the 10 you'll never regret it ... thanks american muscle for the complete guide for choosing a gear for my application ....

    martinthetrain

    Year: 1997 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Québec. Canada

    Helpful (2) (0)

  • 5/5 Yes, I recommend this product

    October 10, 2014

    Holy Smokes!

    First off, I did take it to a shop and had it done professionally. It cost $525. So total out of pocket is under $800. I have done CAI, tuner, short throw shifter, lowering springs, and wheels. THIS IS THE FIRST THING THAT SHOULD BE DONE ON ANY MUSTANG. Unbelievable difference in the launch, running through the gears, the whole deal. I can't wait for one of those little import tuners to flex some muscle. I definitely can hold my own against them, but they always get me off the line. I don't think that will be a problem any more. I don't know why this is not a standard gearing for the Ford Mustang.

    dherring

    Year: 2008 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 3 Colorado

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    June 24, 2014

    Works in my 1992 F150 5.0 V8 wiht 8.8 Rear end

    This fit my truck 1992 F150 just right and the Rpms went up by 300 at 65 mph, so if for what I paid worth it for sure.

    Simek07

    Year: 1992 Model: Other Driving Style: Daily Driver Council Bluffs, IA, USA

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    February 21, 2014

    Installed Instant Power

    Shop installed the gears for me, I instantly noticed the difference in acceleration. Be sure to get the gear that fixes the speedometer otherwise your speedometer will be off. Great bolt on gear for you mustang. If you are looking for instant acceleration 4.10 gears are the way to go!!!

    jking32

    Year: 1998 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 1 Rapid City, SD, USA

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    January 19, 2014

    0-60 in *WOW*

    I have an automatic. 4.10's are exactly what my Stang needed. I was so bored driving around at 1600 rpms. Now I cruise around at 2200-2700 rpms and wirh my PYPES catted X-pipe ot sounds like a GT should. My motor seems to have a lot less stress on it to when I'm accelerating. I didn't notice any less mpg too. My gas mileage totally depends on the way I drive. Thanks A.M.

    Mosified

    Year: 1996 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Philadelphia, PA, USA

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    January 14, 2014

    The best stuff out there

    If you're swapping gears this is the way to go. Ford Racing has the best quality product at a reasonable price. Everything you need in one package - no need to search for every little detail separately. Easy to assemble, easy to set. Paired with quality lubricant for best protection under load. Quality is important.

    Yankee27

    Year: 2008 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Chicago. IL

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    December 20, 2013

    Crazy Gains!!!

    I got the gears installed by a shop since I don't have the right tools in my garage. After the install, the car seemed to be woken up. It launches better than when it was new, low end and top end performance was increased dramatically, and its easier to keep the tail end out.

    Top 50 Contributor

    JBorelli04

    Year: 2004 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Lincoln CA

    Helpful (1) (0)

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