Quote:
Originally Posted by KGTO
Tranny TH400:
Send out for rebuild, nothing crazy here. Probably replace the converter with one a little more performance orientated. There has been an issue with the feel of the shifter and the neutral safety switch sometimes prevents starting. I don't know yet where the problem is, I suppose it could be in the column or all the parts are just worn.
Rear diff:
Has 3:23 open carrier, they want more gear. Doesn't see highway use and they were asking for 4:10s which I said is too deep. I suggested 3:55 or 3:73. TruTrac posi and replace all the bearings, seals.
|
I'd be tempted to swap in a 700r4. They have a deeper 1st gear ratio of 3.06 vs 2.48 in the 400 trans
3.23 x 2.48 = 8.01
2.23 x 3.06 = 9.88
9.88 ÷ 2.48 = 3.99
Effectively it will launch like the 4.10 they wanted but cruise down the highway with 25% less rpm