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Old 08-14-2012, 11:10 AM   #1
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gears

i want to know if i am just changing out my 3.27 to 3.73 do i need to get anything else other then the gears?
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Old 08-14-2012, 11:26 AM   #2
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Shims at a minimum and new crush washer for pinion. Rebuild kit would be a good idea for high mileage
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Old 08-14-2012, 11:45 AM   #3
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Re: gears

also dont attempt it on your own if you have no experience in that department
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Old 08-14-2012, 11:54 AM   #4
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Re: gears

thanks where would a good place to buy all that be.
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Old 08-14-2012, 12:02 PM   #5
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Re: gears

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thanks where would a good place to buy all that be.
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Old 08-14-2012, 12:04 PM   #6
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Re: gears

shims and crush washers should be in the rebuild kit right.
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Old 08-14-2012, 02:07 PM   #7
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Re: gears

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Shims at a minimum and new crush washer for pinion. Rebuild kit would be a good idea for high mileage
In your opinion what would you consider high mileage. Mine just turned 78k and will be ordering gears in jan. So around 80k or so.
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Old 08-14-2012, 02:28 PM   #8
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I'd go ahead and change out everything. It's gonna be pulled apart anyway
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Old 08-14-2012, 02:53 PM   #9
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Re: gears

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thanks where would a good place to buy all that be.
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In your opinion what would you consider high mileage. Mine just turned 78k and will be ordering gears in jan. So around 80k or so.
We have just the kit you need for a gear change. Actually, we have two, one with new bearings and one you use your factory bearings. If you have less then 40k I would just reuse your factory bearings and go with the cheaper kit.

Hope this helps both of you guys out. Give me a shout if there's anything else I can do!

Shane
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Old 08-14-2012, 10:58 PM   #10
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Quote:
Originally Posted by Havixs
i want to know if i am just changing out my 3.27 to 3.73 do i need to get anything else other then the gears?

just take it to a shop they will do all that for you
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Old 08-15-2012, 02:08 AM   #11
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Re: gears

could send a link to those kits

---------- Post added at 01:08 AM ---------- Previous post was at 01:08 AM ----------

thanks for all the info everyone
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Old 08-15-2012, 06:16 AM   #12
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Re: gears

Looking at your car I assume it's a '99-'04 GT. Differentiating between a V6 and V8 is a big deal because the V6 stangs use a 7.5" rear end and it's bigger brother the V8 GTs use a 8.8" rear. There's nothing wrong with either rear-end but parts will be application specific so be wary when you choose and don't be afraid to ask questions, both on this forum and at the shop you choose to do an install. Also; BIG THING: Shop around on install prices. Most shops wanted to charge me $550+ just for install but I finally found a decent shop to charge me only $373 after tax for install and 6 month warranty(in case of whine or malfunction).

I'm linking you to a 8.8 rear-end specific parts for mustangs ranging from years 1999 to 2004. Again note your year when selecting.

Here is the link for the actual gear(I'm linking you to 4.10 set because it's my favorite. If you want 3.73 search for it yourself haha). The different manufactures that are popular are Motive, Richmond, FRPP, and a couple others.. I always choose FRPP because I've heard mixed reviews about all other gear sets but only good about FRPP:
Ford Racing 4.10 Gears (99-04 GT) M-4209-G410A

Here is the link for the T-LOK rebuild kit for 8.8s. It's highly recommended since you're already gonna have a shop open it up to get this rebuilt on higher mileage vehicles(or vehicles that get driven hard). That being said.. I didn't do this when I installed my gears at 105K miles in my GT and haven't had any problems. It's your choice but highly recommended:
Ford Racing 8.8" Traction-LOK Rebuild Kit w/ Carbon Discs M-4700-C

Here is the install kit which a shop will need to complete install. I linked you to the install kit with the bearing rebuild because, like the T-LOK rebuild, it's nice to do it while it's apart and be done with it; especially for higher mileage vehicles. It's cheap, too. The install only kit is like $35 so why not step up while here? I did choose this option:
Rear End Installation and Bearing Kit (8.8in) R8.8RMK

And finally here is the gear oil. I think it takes 3 bottles but I bought 4. You don't HAVE to use royal purple but it has a pretty great rep for what it does. Just make sure to read up on whatever oil you do choose. A 8.8 GT takes 75w90 gear oil:
Royal Purple Max Gear 75w90 Mustang Gear Oil 1300


Good luck and don't fear the gear. Like I said I went 4.10 and am extremely happy with it. Read the threads in my signature for a bit more information, discussion, and experiences with 4.10s.

Happy modding.


Edit: To answer an earlier question about "what is considered high mileage"; It's all relative. It really depends on the age and condition of the vehicle. Like if I had a 1989 GT and went to swap gears I'd do a complete rebuild, I don't care if it had 10k miles on it. That being said, my 2002 GT had 105k miles when I did the gear swap and I rebuilt everything except TLOK. For $100 bucks it's a great peace of mind thing but I felt the car was still relatively underpowered to really cause any problems on a 105k mile TLOK and I don't ride it that hard so I wasn't worried. Generally I'd say rebuild the whole thing if it's pre-'95 no matter the miles. And after '95 I'd say over 100k miles recommended total rebuild, definitely bearings at least. And over 130kmiles any year should go ahead and rebuild. I'm no mechanic but I've read up a lot on it and been there done that... It's just peace of mind, like I said, and what I'd suggest and what I've heard suggested.
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Old 08-15-2012, 08:44 AM   #13
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Re: gears

hey thanks for all the info and thanks for the time that everyone put in on the question
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Old 08-15-2012, 04:50 PM   #14
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Re: gears

ColeJohnson has it down! Thanks for the assistance! If you have more questions, feel free to shoot me a PM.

Shane
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Old 08-15-2012, 05:00 PM   #15
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Re: gears

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ColeJohnson has it down! Thanks for the assistance! If you have more questions, feel free to shoot me a PM.

Shane
No problem! I'll be looking for that job offer in my inbox whenever ya feel right about it, Mr. Shane.
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Old 08-15-2012, 05:26 PM   #16
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Re: gears

Dont do it yourself unless you know how to do it,,took me a few times at work to learn how to do it right...Im still going to be nervous doing my own,,all the ones in our fleet,,our just regular diffs..ive never done one in a mustang yet,,They have a good video i seen online,,that took u step by step,,but i cant find it now...
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