700R to a TH350
Instructor
Joined: Dec 2009
Posts: 111
Likes: 1
Race Director
Joined: Jun 2004
Posts: 13,963
Likes: 709
From: WI
For fast shifting you can use an electronic or CO2 air shifter with RPM switch.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
As Pete K noted earlier, PATC have a 2.84 1st gear conversion for the T700 that is showing .2-.3 ET improvement with the gear swap only due to less rpm drop on the 1 - 2 shift. The reduced 1st gear ratio also helps with spin off the line in high Hp apps
Last edited by rodj; Jan 6, 2010 at 05:33 PM.
Race Director
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
I use a 4L60E with a 4.33 rearend. Talk about a quick shift. Launches are 1.40 60' and very consistant 10.60 runs. Because it is computer controlled, I just leave the shifter in drive and let the car win the race. 
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
Frank, look at this post. http://forums.corvetteforum.com/c4-t...r-the-guy.html
Go to the 10th response and a guy list the place to buy the adapter I believe you are asking for.
Good luck, and let us know how it turns out.
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
But I suspect the 400 will require alot more mods to make fit. For openers, how close is the length to the orig. transmission. Will exhaust clear the transmission? Again, I have no experience with that conversion, but I do suspect alot more work then would be with the 350 transmission.
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Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Several have done it in the past ; short shaft TH400 is shorter than T700 .28 3/8 " vs 29 7/8" for Vette T700
