How much would it cost to install 3.73's on my stang? I plan to buy if from Ford and have the dealer install it. Thanks!

 

The Ford book puts the gears at about 3 hours if I remember right. You will also need an install kit (bearings, crush sleeve, pinion nut, shims, etc.)--that costs about $100. And you will also need new gear lube...so that should let you make a pretty good estimate.

 

Depends on the shop rate of course. A local non-dealer shop here charges $250 assuming you bring everything else (gears, install kit, lube). You might just use that as a 'reasonableness test' when they quote you a rate.

Insure they'll back their install in writing. It whines - they do it over. Some installers won't work with the Motive or Richmond gearsets as they can't guarantee no whine. There are a number of opinions about this - peoplehere are pretty adamant that if the installer knows what they are doing that any helical cut gears should not whine. I believe the FRPPs go in with all the stock shim settings and are therefore just easier to get right.

 

I do my own work and I have done hundreds of installs forcustomers and friends over the years.
I installed Ford Racing's trak-loc diff but left the gears stock 3.31.
It takes at least a couple hoursto do the job right.

The dealer I baught my stang from is one of the best on the East coast and they have certified mechanics that are just amazingly competitent. The dealer won't settle for anything less which is great.

I would suggest you purchase your own parts and have your Ford dealer's top drive train specialist do the installation. That way you'll be covered under warranty and if anything goes wrong you'll be covered. Chances are the work will be done right the first time which is always ideal. Especially when it comes to rear end work. They have the spec's and the tools and usually the skillsto do it right. Make sure you provide them with the correct friction modifier if you supply the parts.

Good luck!

 

DO NOT LET THE DEALER TOUCH IT

find a reputable tranny or rear end shop around and try and get a referance from a local stang club, they deal with gears on a daily basis, half the people at the dealer can change oil and thats it,

you can get motive 4.10 gears from americanmuscle.com (discount code mustangboards) for $160, no helical cut gears will whine if installed correctly, you will also need a tuner to correct the speedo if you dont already have one. i strongly recomend justin from vmptuning.com these two will make your car a lot faster and you will loose 2 mpg on the highway and if anything gain anything in the city

 

+1 I have never heard of any dealers doing quality rear end work plus they will charge 3X what most speed shops/ transmission shop will charge you. You can have all the ASE certifcation in the world but rear ends are one of those thing that really requires experience and practice.I'm betting most dealerships don't do rear-end work on a normal basis.4X4 shops on the otherhand may work with ring and pinion gears more oftenGet the gears from summit for around $200 along with an install kit for $100 Like Al said. An install job should run no more than $325-350 with $250 being the average.

 

ASE means simply you took a test, nothing else, my 10 year old cuz could probably pass it[8D]

 

Wow. Thanks guys. I think I just decided to not even go through this hassle. I should just get a tuner from Brenspeed and hope that satisfies me.

 

well gears is a great bang for the buck. Just a tuner alone won't do much. A tuner and a CAI will work great. Don't let the gear install or who installs them scare you away. Just shop around and find a place that's known to do rear end gear swaps. The dealership will rape you on price so don't go there. Also depending on mileage you might not need a install kit. Ford racing gears come with everything you need if you don't need shims etc.. The place that install them will know if you need new shims etc and will tell you then but they should have those kits. The shop i go to, since i have low miles, i don't need a kit, just the gears but if i do need something, they will change it out and i could pay only 20 bucks instead of 100 bucks for a install kit, also the 200 bucks for installing the gears. Just shop around.

 

Twenty years wrenching with extensive rear diff experience...

If you're low milage you shouldn't need an install kit, just a pinion seal and crush sleeve. The shop installing should have any shims needed if they do alot of installs. Don't believe in certain brands whining, that's just a sign of a bad install, unless they're just cheap third rate parts, you can't go wrong with any of the major names out there, FRPP, Motive, Richmond, Gear Vendors. Just ask around your town and someone will lead you in the right direction for a quality install.