InsaneDomestics

iTrader: (28)

I'm gonna be helpin a buddy do a th400 Swap on his 04 Regular Cab SB, Just need some help along the way.

We already got the FTI th400 and a LS Specific Converter so as far as getting this to mount up all we have to do is make a crossmember correct?

I havent found out much about the differences in the Flexplates, what is all that about?

I know the Driveshaft will have to be shortened and all that jaz
(I think we got it covered)

How long of a Dipstick Tube is used?

And what about the Speedo?
I read something about the Speed Sensor from a 3L80 (PN8655291, 8655315) and a Connector (PN12085498)

If there is anything I left out that I'll need to know? Thanks!

JoeyGC5

iTrader: (24)

You can try those speed sensor adaptors, I've used the Dakota Digital pulse generator and the front wheel speed sensor before in th350/400 swaps.

Lokar makes a flex dipstick that will work out well.

InsaneDomestics

iTrader: (28)

Ok, Anything else I might need to know?

Gadgetized

iTrader: (9)

What are you using for a converter? You might be able to get the converter made to match up with your flexplate. I'm not sure if a regular flexplate will work.

jasond26

iTrader: (21)

I have done the swap and here is a list of stuff that I done that might help.

TCI flexplate has the bolt pattern and adapter to run old school converter.
I ordered my tranny with speed sensor installed, you can call any of the tranny sponsers and I am sure they will give you the part numbers for that.
I welded a plate on the back of my crossmember for the mount and just picked up a energy suspension tranny mount from autozone.
Used a Lokar dipstick.
Local driveline shop to shorten the driveshaft.
B&M ratchet shifter
Thats about it.