TH350 to TH400 Tranny swap.

[utahmatt]

Hello all, I just put a TH400 in place of the old TH350 in my 76. Everything has gone pretty smoothe, but I need help with 2 things:

First: I need to hook up some sort of electrical switch to the throttle linkage for the electric kick-down and I don't know what type of switch to use.

Next: The shift linkage brackets (that bolt to the pan flange) wont work anymore, the bolt pattern and the pan shape is different. I want to know if I finding a new cable/bracket assembly is easier or should I just fabricate some adapter brackets?

Has anyone else gone through this swap?

Any help would be apreciated, Thanks.

 

[tim-carroll@comcast.net]

can you tell me how you did the upgrade from 350 to 400

 

[gmjunkie]

Hello all, I just put a TH400 in place of the old TH350 in my 76. Everything has gone pretty smoothe, but I need help with 2 things:

First: I need to hook up some sort of electrical switch to the throttle linkage for the electric kick-down and I don't know what type of switch to use.

Next: The shift linkage brackets (that bolt to the pan flange) wont work anymore, the bolt pattern and the pan shape is different. I want to know if I finding a new cable/bracket assembly is easier or should I just fabricate some adapter brackets?

Has anyone else gone through this swap?

Any help would be apreciated, Thanks.

Get a Kick Down switch for a C3 corvette with a Turbo 400, mount it at the gas peddle I think the bracket is already there!!If not you'll have to get one,and then just wire it up!!

 

[tim-carroll@comcast.net]

How do I go about the 350 to 400 upgrade - is there not some sort of conversion kit for this - how would I know how to shorten the driveshaft - do I buy a new one - and the crossmember thing has me totally confused