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01 Vette with a 2.73 rear, found a 3.42 rear, will it bolt right in?

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Old 12-06-2011, 10:12 PM   #1
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Default 01 Vette with a 2.73 rear, found a 3.42 rear, will it bolt right in?

I found a 3.42 geared rear end for a buddy of mine and his car has 2.73's. I know how GM makes little variations in stuff but I don't fool with vettes too much, mostly F-bodies. So I just need to know if this will just be a direct bolt in thing with the speed sensor and all? Just want to make sure before he buys the diff.
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Old 12-06-2011, 11:56 PM   #2
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What year is the rearend from? I Think it will direct

Let me tell you we swapped 3.42 gears from 2.73 gears in my friend's 00 C5 it felt like nitrous LOL your friend WILL BE FREAKING HAPPY WITH THE CAR after the swap
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Old 12-07-2011, 07:56 AM   #3
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What year is the rearend from? I Think it will direct

Let me tell you we swapped 3.42 gears from 2.73 gears in my friend's 00 C5 it felt like nitrous LOL your friend WILL BE FREAKING HAPPY WITH THE CAR after the swap
The rear is from a 97 car and his is an 01
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Old 12-07-2011, 11:19 AM   #4
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The 97 diff will swap directly into the 01. *BUT* the 01 might have a stronger main case. Being an auto car this one be as important, but the 97 case is weaker than the 01-04 case.
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Old 12-08-2011, 06:27 AM   #5
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The car is getting a cam, exhaust, and stall and maybe a little nitrous so Its not like we are trying to run mid or bottom 9's with the car but it will see some 10 sec passes. But it will mostly be ran on the motor.
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Old 12-08-2011, 08:18 AM   #6
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The car is getting a cam, exhaust, and stall and maybe a little nitrous so Its not like we are trying to run mid or bottom 9's with the car but it will see some 10 sec passes. But it will mostly be ran on the motor.
In that case I believe I would still like to have the 01 up 3.42 with the better case.

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Old 12-08-2011, 10:27 AM   #7
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Will an 01 z06 fit as well?
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Old 12-08-2011, 01:07 PM   #8
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An 01 Z06 will fit just fine. But 2001 was a mixed year. Early cars got the weaker single rib differential. You will want to check it out befor you buy it. It could be like the 97. Here is a picture of both.

There is a broken single rib is on the left. The stronger 3 rib is on the right. The 3 rib is what you want.
Click the image to open in full size.
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Old 12-08-2011, 01:19 PM   #9
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Here is the link to it on ebay

http://www.ebay.com/itm/2001-C5-Z06-...06169224641751
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Old 12-08-2011, 01:30 PM   #10
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That differential will work just fine.
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Old 12-08-2011, 03:24 PM   #11
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Good. Thanks guys! I appreciate all the help, now its time to get wrenching!
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Old 12-08-2011, 03:50 PM   #12
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Good. Thanks guys! I appreciate all the help, now its time to get wrenching!
No problem man. Good luck with the project!
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Old 12-08-2011, 10:46 PM   #13
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Something not mentioned, being it's an auto. The shift points will need to be changed in the computer. Needs to be setup for 3.42's or you'll be banging the rev limiter sometimes before it shifts if you are beating on it..
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Old 12-09-2011, 08:12 AM   #14
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Well with the cam and headers going in it will get tuned anyway so the tuner will take care of that.
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Old 12-09-2011, 08:26 PM   #15
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also need to reprogram the speedometer for the new gears.
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Old 12-10-2011, 08:11 AM   #16
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See my post before yours.
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Old 12-10-2011, 08:11 AM
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