View Full Version : 01 Vette with a 2.73 rear, found a 3.42 rear, will it bolt right in?


87silverbullet
12-06-2011, 10:12 PM
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.

venom ws7
12-06-2011, 11:56 PM
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 :D

87silverbullet
12-07-2011, 07:56 AM
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 :D

The rear is from a 97 car and his is an 01

Jeremy@RPMTransmissions
12-07-2011, 11:19 AM
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.

87silverbullet
12-08-2011, 06:27 AM
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.

JHR Performance
12-08-2011, 08:18 AM
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.

Zach

87silverbullet
12-08-2011, 10:27 AM
Will an 01 z06 fit as well?

Jeremy@RPMTransmissions
12-08-2011, 01:07 PM
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.
http://temp.corvetteforum.net/c5/bhall//reargearcase/diff_case_comparo_1_.jpg

87silverbullet
12-08-2011, 01:19 PM
Here is the link to it on ebay

http://www.ebay.com/itm/2001-C5-Z06-Corvette-Differential-3-42-60k-/190602069443?_trksid=p5197.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D5%26po%3D LVI%26ps%3D63%26clkid%3D4751806169224641751

Jeremy@RPMTransmissions
12-08-2011, 01:30 PM
That differential will work just fine.

87silverbullet
12-08-2011, 03:24 PM
Good. Thanks guys! I appreciate all the help, now its time to get wrenching!

Jeremy@RPMTransmissions
12-08-2011, 03:50 PM
Good. Thanks guys! I appreciate all the help, now its time to get wrenching!

No problem man. Good luck with the project!

Steve01SS
12-08-2011, 10:46 PM
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..

87silverbullet
12-09-2011, 08:12 AM
Well with the cam and headers going in it will get tuned anyway so the tuner will take care of that.

rambodog
12-09-2011, 08:26 PM
also need to reprogram the speedometer for the new gears.

87silverbullet
12-10-2011, 08:11 AM
See my post before yours.