Name: Ford Performance 4.10 Gears and Install Kit (86-09 V8)
Brand: Ford Performance
SKU: 100577
Price: 259.99 USD
Availability: InStock
Rating: 4.9 (138 reviews)

Product Information

Features, Description, Reviews, Q&A, Specs & Installation

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 SF4/X4 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.

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

MPN# 100577

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

4.9

Customer Reviews (100+)

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Ratings Summary

4.9 out of 5 overall rating from 100+ customers

Installation Time: Weekend

Installation Cost: $250-$500

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November 18, 2019

5 1994 GT - Nopeitwasntme Installation Time: Full Day

Great kit

Was easy to install and having everything needed in one kit..made it alot easier..
Helpful (0) Thanks for your input!
- Performance Gain
- Fit
October 16, 2019

5 2003 GT - AlanH Installation Time: Full Day

Rear end upgrade

Kit was complete easy to install approximately 4 to 6 hours. Came with royal purple synthetic gear lube nice touch
Helpful (0) Thanks for your input!
- Performance Gain
- Fit
October 02, 2019

5 2006 GT - JulieA Installation Time: Full Day

AMAZING

Took to my local muscle car shop and he did and amazing job. Took it for a 2 hour trip the next day and it was amazing on the hwy 70mph. I haven't noticed any gas drop and 1st gear is still usable. The shop said the gears fit and set up perfectly. I also changed my axle bearing seals and fixed a wheel sensor. I'm so happy I didn't get the 373 kit.
Helpful (5) Thanks for your input!
August 14, 2019

4 1997 Cobra - Bradysvt6

Great

Install went well. Gears make minimal noise deff best first mod for your money woke my 97 cobra up big time.
Helpful (2) Thanks for your input!
- Performance Gain
- Fit
May 29, 2019

5 2006 GT - EdgarM Installation Time: Full Day

Sick

I literally pop wheelies everywhere I go. Just slam the gas in first gear and off you go.
Helpful (5) Thanks for your input!
- Performance Gain
- Fit
May 12, 2019

5 1996 GT - ShawnC Installation Time: Afternoon

Good gear set up

I really love them thank y’all so much I support y’all all the way good people
Helpful (2) Thanks for your input!
- Performance Gain
- Fit
May 07, 2019

5 2004 GT - JerryK Installation Time: Shop Install Installation Cost: $250-$500

04 gt geared up automatic

very nice kit. took out the 3.27s and had the 4.10s installed. low end acceleration is 2 thumbs up. the car comes up on the powerband a lot faster. I used my sct tuner to calibrate the speedo. On the highway in overdrive the car does well. the flowmaster exhaust is screaming a lil bit from the higher rpm from the gear ratio. I love it
Helpful (8) Thanks for your input!
- Performance Gain
- Fit
May 02, 2019

4 2001 GT - DerekK Installation Time: Afternoon

Super cheap

Perfect fitment. The only thing I did not like was the bolts that came with for the ring gear. They had a little bit of play sitting in there so I bought oem bolts. But other then that great product for the price!
Helpful (3) Thanks for your input!
- Performance Gain
- Fit
April 28, 2019

5 1992 GT - Alonso Installation Time: Weekend

4.10 gears install kit

Is a great affordable kit will help you to get the most performance out of your car
Helpful (3) Thanks for your input!
- Performance Gain
- Fit
April 28, 2019

5 2004 GT - Steven

4.10 gears

Havent had a chance to install them but look amazing and ready to feel th power
Helpful (1) Thanks for your input!
- Performance Gain
- Fit

Questions & Answers (41 answers)

5 Top Rated Questions

Should I get the Traction-LOK rebuild?? I have a 2007 mustang GT automatic with only 20k miles on it.. Do you think I need the traction-LOK rebuild kit.. PLEASE HELP I don't know what to do !!!!

Yes go ahead and get it. It will upgrade it the cobra and gt500 specs. The carbon discs hold up way more. And since I'm sure you'll be getting nasty with those 4.10s I'd go ahead and upgrade. You'll have to reuse your clip spring though the kit comes with a cobra spring. But yes go ahead and spend a little extra!
Unless you are going to take it to the track and do a bunch of hard launches you won't need it. If you had higher mileage I would recommend a replace or upgrade.
Since you are putting some taller gears in it sounds like you are doing some drag strip duty with your car. You are going to have the diff torn down to change the gears it would make sense to freshen up the traction loc as well.

Helpful (6) Show 2 more answers

Real quick question, ordering these gears for my 97 cobra. Which gear tooth exactly will I need to fix my speedometer?? 97 cobra stock t45

For your 97 Cobra with 4.10's you would either need a 23t speedo gear, or you would need a 6 tooth drive gear used in conjunction with a 20t speedo gear. We do not offer and recommend against the 23t speedo gear, as they have a tendency to wear prematurely not seen in the lower tooth count gears.

Helpful (5)

will i have to update my tune through bama whenever i install these new gears? i have a bama tune and am wondering if i will have to email them requesting a tune upon installation.

Yes - for those with 1999+ V8 Mustangs, you will want to let our Bama team know that you have upgraded your gear ratio. They can add that to your tune information, which will correct your speedometer reading. Hope this helps!
Yes. The gears will affect your speedometer and shift points for transmission. If you have tuner that you can update your mods you can also do it that way. But it's really easy to call or email Bama for a custom tune.

Helpful (3) Show 1 more answer

Do i really need the rebuilding loc kit? I have a 2001 ford Mustang gt convertible 5 speed with 97k miles I want to purchase the 4.10 install kit

The Ford Performance LOK kit is not required to do when swapping how gears, however, it would not be a bad idea to have everything changed to new when you are in and doing the gears.

Helpful (2)

is anything else needed to change gears

This would be a full kit and would not need anything else to do the swap. A tuner would be recommended to correct the speedometer but would not be needed for the install of the gears.

Helpful (1)

10 More Questions

can i use this oil ? car specifies 75-140 2 answers

Use the oil that comes in the kit.
You can. The 75w-140 flows the same as 75w-90 The 90 is a thinner viscosity than the 140. Both are fine to use. I use the 140 vs the 90. Really just a preference. Ford used to call for the 90. Then changed do to the 140 being a tad better at resisting breakdown.

Helpful (1) Show 1 more answer

I'm getting my 4.10 gears installed from a 3.37 in a weak and I've heard that you loose a bit of power spinning the 4.10 gears. Is this true or is it nonsense?. 0 answer

I have a 1989 mustang 5.0.Will the 4.10 gears hurt the stock automatic transmission? 1 answer

This would not hurt the transmission no.

Helpful (0)

Do I have to have a tune with these gears? 1 answer

This will affect your speedometer reading and you will indeed require a tune for this upgrade.

Helpful (0)

Will this kit work on my 28 spline? 1 answer

This Ford Racing 4.10 Rear Gear and Installation Kit is designed for use with 8.8in solid rear axle equipped Mustangs. This will work with a 28 Spline axle set-up used on a 8.8in rear end.

Helpful (0)

I have the iTSX tuner, if I get the gear kit can I correct the speedometer myself ? All ready have a tune installed . Do I HAVE to get a new tune? 06 gt automatic 1 answer

If you have custom tunes on the ITSX you would need to get a new updated tune. If you are using the pre-loaded tunes on the ITSX then you can adjust it yourself.

Helpful (0)

Do I need to buy the full rebuild kit if Im buying a brand new differential to install these for 1 answer

We recommend the full install kit as this will include everything needed for a pain free swap.

Helpful (0)

Will this work with the stock clutch or do I need to get a upgrade 1 answer

The clutch will not need to be upgraded when going with a new gear set.

Helpful (0)

I've had 2 quotes for this upgrade by local shops. 1 was for $2100.00 plus tax telling me I need to upgrade my carrier as well. the other was for $1200.00 plus tax both are way higher than the suggested cost. I own a 2007 Mustang GT 4.6L 3v that has a 3.31 rear with 8.8 axles why would the cost be so much higher than what you list on your site. 2nd question Dose this car ave a 28 or 31 spline? 1 answer

For the 2007 model years, the Mustang GT had 28 splines, the GT 500s had 31 splines. As we do not partner with any installation locations, we cannot comment on the quotes you received from local shops. Conferring with the shops in question to confirm exactly what is included in their quotes (labor, parts, shop fees) is suggested.

Helpful (0)

Would this fit my 2014 mustang gt 1 answer

This will not fit with 2014 GT Mustangs.

Helpful (0)

Installation & What's in the Box

Installation Info

Installation Time

(approx) 4 Hours

Difficulty Level:

Mechanical expertise or professional installation required.

Installation Guides

Manufacturer:
Differential Gears - Installation Instructions

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

Will It Fit My Mustang

Bullitt - 01, 08, 09
Cobra - 93, 94, 95, 96, 97, 98, 99, 00, 01, 03, 04
Cobra R - 93, 95
GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09
GT500 - 07, 08, 09
LX - 87, 88, 89, 90, 91, 92, 93
Mach 1 - 03, 04
Other - 86

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

Frequently Bought Together

$39.68

$112.99

$226.99

Review & Installation Video

Product Information

Features

Description

Customer Reviews (100+)

Questions & Answers (41 answers)

5 Top Rated Questions

10 More Questions

Installation & What's in the Box

Will It Fit My Mustang

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

Frequently Bought Together

$39.68

$112.99

$226.99

Review & Installation Video

Product Information

Features

Description

Customer Reviews (100+)

Questions & Answers (41 answers)

5 Top Rated Questions

10 More Questions

Installation & What's in the Box

Will It Fit My Mustang

Related Mustang Categories

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