MountainMotor

iTrader: (2)

Just wondering something, I'm looking into getting a TH400 and wondering what all I'm gonna have to buy extra to get the tranny to fit and function properly (brackets, cables, wiring, etc.)? I tried searching but just keep coming up with bits and pieces. I would be switching from a 4L60E.
Thanks

eric01ss

iTrader: (13)

need m6 crossmember, trans, stall, 6.0 flexplate and i trying to think what else

MountainMotor

iTrader: (2)

Thanks, trying to start pricing on parts so now I know where to start. If you think of anything else just let me know.

CAT3

iTrader: (9)

You can use the M6 X Member?

BMR Xmember with TA Relocation $220
Shifter, ratchet type w/ cable $180
ATI or TCI Flexplate $180
TC, take your pick.............$200-$1200
Speedo adapter, I had Carl Rossler send me a 9" tailshaft with the correct bosses welded in for the TH350 conversion $200 and reluctor wheel since I didnt pull it off the 4L60E $20.
Transmission, again its up to your goal/budget $700-$3500
Trans Cooler, ditto $80-$300+

Only bummer about swapping for me was losing the exhaust hanger mounted off the tailshaft...but I am sure I will get over that once the new exhaust is hung

Jimmy P

iTrader: (177)

You can use the M6 crossmember, but you need to put about 1" worth of large washers in between the crossmemer and trans mount. I wouldn't recommend it as mine was originally done like that and the bolt fell off without me even realizing it. Just buy a Yank or BMR TH400 crossmember and do it right the first time. Some have reported issues with them not fitting right, but my Yank fit in perfectly.

12secSS

iTrader: (30)

There is a sticky at the top of this section and it has everything you can ask for. Try it out first, then ask if you can't find anything more specific.

https://ls1tech.com/forums/automatic-transmission/197642-what-would-you-like-see-addressed-th400-faq.html

BKHAWK1

You can use the stock shifter and the stock fly wheel!!!!! It has to be a 98 flywheel!! the stock A-4 shifter will work and you can use a lockout plate to keep it from going from 1st to 3rd. ATI is by far the best convertor!!! 9"!!!! go short tail and the stock D/S will work also. Lockar can make a flexable dipstick. (36" is pleanty). I went with the BMR cross member and a sphon tq arm. That is how i did my swap and it works!!! The speedo works also. Just bought the pig tail and spliced the wires together.

MountainMotor

iTrader: (2)

Thanks guys, getting a lot more info here. Was wanting to keep as much stuff as I could without replacing everything, but what i do replace I'm gonna replace with quality stuff. More pricing for me to do.