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1986-09 Ford Mustang Ford Racing 3.73 Gears Kit for 8.8" Rear End by Ford Racing Performance Parts


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Mustang Ford Racing 3.73 Gears Kit for 8.8" Rear End (86-09)
This 86-09 Mustang 3.73 gear kit includes everything needed to do a gear install, except for the mechanic!

Item# LRS-4209FRB-K

Your Price: $255.99

Market Price:$259.99
You Save 1.56 % ($4.00)

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Benefits

  • Improved Acceleration
  • Eliminates Guesswork
  • Everything You Need To Do The Job Right

Features

  • Royal Purple Gear Oil Virtually Eliminates Wear
  • Friction Modifier Provides Smooth Operation & Prevents Chatter

What's in the Box

  • (1) 3.73 Ring Gear
  • (1) 3.73 Pinion Gear
  • (1) Master Bearing & Shim Kit
  • (1) Bottle Friction Modifier
  • (2) Bottles 75w90 Gear Oil

Product Description

Mustang 3.73 Gear Kit M-4209-F373N
These Mustang 3.73 gears are a great way to improve acceleration to make your Mustang faster! This kit fits 1986-2009 Mustangs with an 8.8" rear end and features a set of performance Ford Racing 3.73 gears, an FRPP M-4210-B2 bearing kit, a bottle of Ford Racing friction modifier, and 2 bottles of Royal Purple 75W90 gear oil. The bearing kit includes GT500 pinion bearing, carrier bearings, pinion seal, ring gear bolts, pinion nut, crush sleeve, shims, and marking compound. With this kit, you can get your gear installation done quickly and easily.

Ford Racing Friction Modifier
Ford Racing friction modifier is a specially formulated additive to provide smooth operation of clutch-type limited-slip differentials. 1 bottle of friction modifier is required when changing the gear oil in rear ends equipped with Ford traction-lock units.

Royal Purple Max-Gear Oil
Royal Purple Max-Gear gear oil is an ultra-tough automotive gear oil. It’s designed to maximize power and provide unsurpassed protection to heavily loaded gears. It makes gears run smoother, quieter, cooler and longer without overhauls. Max-Gear outperforms other gear oils because it combines the highest quality synthetic oils with Royal Purple’s proprietary Synslide additive technology.

Notes
Although the Royal Purple gear oil has friction modifier mixed in, it is still recommended that you use the bottle of Ford Racing friction modifier to supply your rear end with the proper amount of modifier.

Kit includes:
1 Ford Racing Performance Parts 3.73:1 gearset
1 FRPP M-4210-B2 bearing kit (includes GT500 pinion bearing, carrier bearings, pinion seal, ring gear bolts, pinion nut, crush sleeve, shims, and marking compound)
1 bottle of Ford Racing Performance Parts Friction Modifier
2 bottles of Royal Purple 75W90 gear oil

Application
- Fits 1986-2009 Mustangs with 8.8" Rear Ends

**Although the Royal Purple gear oil contains friction modifier, we highly recommend including the Ford Racing friction modifier along with the gear oil when refilling your rear end.**


Product Videos

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Community Q&A

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Customer Reviews


4.9
out of 5 stars
5 stars
19 reviews
5 stars    18
4 stars    0
3 stars    1
2 stars    0
1 star    0

100%
OF CUSTOMERS
RECOMMEND THIS PRODUCT
19 of 19 REVIEWS
RECOMMEND THIS PRODUCT
19 of 19 REVIEWS


  Feels great
By on 2/12/2014
So far I'm only 100 miles into my break in period but there is no noise whatsoever. I'm still gonna take it easy for the first 500, but I can already tell that 5th gear pulls harder, but I haven't had a chance to compare them to my 1/4 mile times or acceleration yet....a second review to come.

Yes, I would recommend this item to a friend!


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  Love it
By on 3/22/2014
Installed this kit on my 89 gt. Way better then the stock 2.73 gears. Awsome. Very happy

Yes, I would recommend this item to a friend!


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  A perfect match.
By on 3/17/2014
These FRPP 3.73 gears really make my pony gallop...

Yes, I would recommend this item to a friend!


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  Geared to perfection
By on 5/5/2014
Recently purchased the 3:73 gear set. Turnkey job. All you add is labor. Thanks for packaging the product in this manner.



Yes, I would recommend this item to a friend!


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  The gear ratio Ford should have used
By on 7/2/2014
Like most people I bought this gear ratio to replace the 3.27 gears that came stock in my 1996 Cobra. Out of all the brand gears out there Ford Racing Gears are by far the best and easiest to install in an 8.8 rear end. This kit has all the bearings (the ones in my kit were made in the USA) and more than enough shims to do the job, all you need is an afternoon, a good press and a few hours to have in my opinion the best gear ratio for your Mustang.

Yes, I would recommend this item to a friend!


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  Great mod!
By on 3/27/2014
Bought the Ford racing 373 gear kit a coupleweeks ago and just got them installed today. It sure did wake my stang up! The PA valve body and gears on my aod sure feels a lot different than the stock 273's! I would definitely recommend these gears and valve body combo on your Fox body aod before any other mods! Got my sub frames to. Will install later. All my stuff arrived on time! Thanks Latemodel Restoration!!

Yes, I would recommend this item to a friend!


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  LOVING IT!
By on 4/1/2014
I am loving driving my Mustang with the new gears. The power is awesome.

Yes, I would recommend this item to a friend!


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  the best kit available
By on 5/23/2014
Comes with everything needed to install the gear correctly

Yes, I would recommend this item to a friend!


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  Great product
By on 3/29/2014
Easy to install great quality product

Yes, I would recommend this item to a friend!


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  shims are too thick..
By on 9/20/2014
I'm no mechanic but I have some mechanical know how.. It has everything you need.. except shims don't go small enough to get the backlash to that magical 8 thousands to 12 thousands backlash.. I had to leaving it at 14... which is 2 thousands outside or recommended tolerances..( yes I used a dial indicator)... and may be the reason a bearing is about to fail :/ so its going to the mechanic to get fixed up right.. would I recommend it to a friend? if he was going to have a mechanic do it.... sure.

Yes, I would recommend this item to a friend!


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  Ford racing gear kit
By on 8/11/2014
I searched around a month or two trying to find the best deal if Im going to shell out that kinda cash for a gear swap and came upon this deal and was floored but had my doubts. dug into a little more and you cant beat this. actual Ford racing gears not some cheap over seas products, install kit with American bearings, royal purple diff fluid and friction modifier. In my opinion best deal out there and in no way getting cheap inferior parts.

Yes, I would recommend this item to a friend!


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  Love the gears
By on 8/15/2014
I bought the last week and put them in as soon as I got them in the mail. And man do you feel the difference, compared to the stock gears! I recommend this part for mustang lovers that still drive highway every so often. I drive highway and it doesn't idle too high.. Over all love them! Thanks late model

Yes, I would recommend this item to a friend!


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  3.73 gear kit
By on 4/25/2014
Purchased this kit two weeks ago, price was excellent and shipping was fast. Got them installed last week and what a difference it made compared to the stock 2.73 gears. Like a new car. Just ordered the tune up kit..

Yes, I would recommend this item to a friend!


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  Perfect kit
By on 9/29/2014
Product shipped and arrived quickly, as usual. Everything was in the kit as described, it's really handy that there's 2 crush sleaves. Installs with a factory like fit.

Yes, I would recommend this item to a friend!


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  Awsome product
By on 9/11/2014
Installed this kit on my 89. I loved it. Just bought a 94 mustang. And order the same set of gears for it.

Yes, I would recommend this item to a friend!


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  Much better gearing
By on 8/6/2014
Perfect gears for my car. Much better bottom end and still good for the highway

Yes, I would recommend this item to a friend!


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  Geat deal for everything
By on 7/30/2014
My mechanic wanted to know where i got a great deal on the kit and gears!

Yes, I would recommend this item to a friend!


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  3.73 gears and install kit
By on 4/30/2014
Great technical support and product.
Love the free shipping, too.

Yes, I would recommend this item to a friend!


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  Great product
By on 8/25/2014
Great gear for highway going places and track love it

Yes, I would recommend this item to a friend!


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Vehicle Applications

Ford Mustang - 1986 (86) - 1987 (87) - 1988 (88) - 1989 (89) - 1990 (90) - 1991 (91) - 1992 (92) - 1993 (93) - 1994 (94) - 1995 (95) - 1996 (96) - 1997 (97) - 1998 (98) - 1999 (99) - 2000 (00) - 2001 (01) - 2002 (02) - 2003 (03) - 2004 (04) - 2005 (05) - 2006 (06) - 2007 (07) - 2008 (08) - 2009 (09)


About This Brand


Ford Racing Performance Parts
Ford Racing Performance Parts - Mustang Ford Racing Parts
Ford Racing is the leader in performance parts and accessories for Mustang and Ford Lightning.

LatemodelRestoration.com is proud to offer Ford Racing Performance Parts for your project. Ford Racing is dedicated to manufacturing the highest quality products offered in the industry. Choose from suspension, exhaust, wheels, and other performance parts at LatemodelRestoration.com. If you want the best for your Mustang or SVT Ligtning, look no further than FRPP!

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