Installing 3.73's

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Oct 4, 2004 | 08:54 PM

NateLS1

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From: Cape Cod, MA

Installing 3.73's

I purchased some used 3.73's with about 5k on them. I currently have a 01 M6 T/A with about 40k miles.

1. Will these just bolt right in, no need to buy anything else? (shims, etc)

2. What type of fluid should I put in the rearend with these gears?

3. I have no idea where any shops are around here that can correct my speedometer with LS1 Edit/HP Tuners or whatever...any other ways? I live in MA.

Thanks in advance,
Nate

Oct 4, 2004 | 09:10 PM

Zach@Texas-Speed

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From: Lubbock

i just put in 3.73's and the stock shims ended up being optimal backlash, but i bought a basic install kit beforehand just to make sure....just make sure you get the preload on the pinion set to the right inch-lbs, inspect your u-joints on the driveshaft and all the bearings in your diff, after all that you should be set

i used valvoline synthetic blend gear fluid and limited slip fluid as well

my speedo is exactly 10mph off...i dont even use it anyway

Oct 6, 2004 | 02:47 PM

c5blkvette

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From: California

I am interested in swapping my own gears as well. Where did you get the basic install kit from? and what did you pay for your gears?

Thanks

Quote:

Originally Posted by bowtie4life

i just put in 3.73's and the stock shims ended up being optimal backlash, but i bought a basic install kit beforehand just to make sure....just make sure you get the preload on the pinion set to the right inch-lbs, inspect your u-joints on the driveshaft and all the bearings in your diff, after all that you should be set. i used valvoline synthetic blend gear fluid and limited slip fluid as well my speedo is exactly 10mph off...i dont even use it anyway