Installing 3:90 gear?
Race Director
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
DTE Engineering also.
Replacement of the whole differential is what is needed. Apparently the Corvette rear end needs certain tools to rebuild it, different than other differentials.
Check out both mentioned web sites and call to talk.
I went with DTE 4:10's 3 years ago and could not be happier. I got the street stage 2 with upgraded oiling system and carbon clutch packs as well as cold hardened ring and pinion.
Replacement of the whole differential is what is needed. Apparently the Corvette rear end needs certain tools to rebuild it, different than other differentials.
Check out both mentioned web sites and call to talk.
I went with DTE 4:10's 3 years ago and could not be happier. I got the street stage 2 with upgraded oiling system and carbon clutch packs as well as cold hardened ring and pinion.
Melting Slicks
Joined: Apr 2007
Posts: 2,987
Likes: 16
From: Phoenix
Drifting
Joined: Sep 2004
Posts: 1,912
Likes: 33
From: S.D. CA
My local dealer had my diff apart 1 year after I bought the car. Turned out to be a cracked spyder gear. I became friends with the tech who was working on my car...he did a couple of things for me at his house for a big discount!
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Race Director
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
If you go the ring and pinion change be sure the shop has experience in corvette rear ends.
When I looked into it only one shop would do it locally and I was not impressed when I stopped by for a visit. So I went with the complete rebuild from DTE.
When I looked into it only one shop would do it locally and I was not impressed when I stopped by for a visit. So I went with the complete rebuild from DTE.
Race Director
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
At the end of the 1/4 you will be in 4th rather than 3rd. Should help out of the hole if launched right.
Much more fun to drive on the streets. Lost a few mpg. Although if I drive for fuel economy maybe only 1 1/2 mpg on a trip, as compared with same trip with 3:42's.
6th gear becomes usable for passing at freeway speeds.
Probably my favorite mod other than tint which is a must on all my cars.
Much more fun to drive on the streets. Lost a few mpg. Although if I drive for fuel economy maybe only 1 1/2 mpg on a trip, as compared with same trip with 3:42's.
6th gear becomes usable for passing at freeway speeds.
Probably my favorite mod other than tint which is a must on all my cars.
Race Director
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
No track time here. I did the gear change because I always felt that the corvette was geared to long for my driving style.
Just a wild uneducated guess would be .3 off time, but dunno really!
Just a wild uneducated guess would be .3 off time, but dunno really!
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
Post 11 explains why gears feel so good.
Gears help the launch tremendously. You still have to learn to drove but the gears make it a lot easier. Should give you .2 or more in the 60 foot when you learn to launch, assuming you don't already know. If you know, the gears will make it a lot easier.
http://forums.corvetteforum.com/c6-t...ast-heads.html
Gears help the launch tremendously. You still have to learn to drove but the gears make it a lot easier. Should give you .2 or more in the 60 foot when you learn to launch, assuming you don't already know. If you know, the gears will make it a lot easier.
http://forums.corvetteforum.com/c6-t...ast-heads.html
Racer
Joined: Oct 2011
Posts: 475
Likes: 3
From: Jacksonville TX
I have read a few threads on this. Most if not all the speciality corvette shops recommend just replacing the differential. They stated it is very difficult to do just a gear swap. The shops will normally give you an exchange rate for the one that is pulled out of your car.