Th400 to 4l60E

[blackbuck350]

Hey guys I know there’s a lot of good information on LS swaps on here but I really didn’t see anything on the project I’m about to start. I have a LS1 in my wagon now carburetor about 1000hp, wi built th400, taking the wagon off the track and making just a street ride going with a mild 5.3 with 4l60e transmission, right now the car is being ran through the 6ls msd , My question is what will I need wh I change over to the 4l60e transmission? because I know that trans is electronic, also 5.3 will be set up with carb. also. Thanks

 

[blackbuck350]

Any particular reason you are opposed to fuel injection? Factory ecm would control your trans and FI would fit the bill for a weekend cruiser.

I’m opposed because I have everything to convert to carb, not trying to spend a bunch of unnecessary money especially when I’m working on two projects

 

[Built6spdMCSS]

Might work, I know the Drive Shaft is the same length just change the Yoke.

 

[565bbchevy]

Good looking out picked up a 700r4 , what about the transmission crossmember?

You need a different crossmember, the TH400 and 200R4 are interchangeable but the mount for the 700R4 is about 5" farther forward than your TH400
I have the Jegs crossmember on my Regal and had no fitment issues with my 200R4 and they are pretty affordable.

JEGS 640601: GM 700R4, 4L60, 4L60E Transmission Crossmember - JEGS

trans crossmember, transmission crossmember, g body crossmember double hump, g body crossmember, g body double hump crossmember

www.jegs.com

 

[blackbuck350]

You need a different crossmember, the TH400 and 200R4 are interchangeable but the mount for the 700R4 is about 5" farther forward than your TH400
I have the Jegs crossmember on my Regal and had no fitment issues with my 200R4 and they are pretty affordable.

JEGS 640601: GM 700R4, 4L60, 4L60E Transmission Crossmember - JEGS

trans crossmember, transmission crossmember, g body crossmember double hump, g body crossmember, g body double hump crossmember

www.jegs.com

thank for the go info

 

[64nailhead]

Wanna sell the TH400? And where are you located?

4L60? That is a puzzling swap for any motor beyond 300hp.

 

[blackbuck350]

thank for the go info

Good

Wanna sell the TH400? And where are you located?

4L60? That is a puzzling swap for any motor beyond 300hp.

located in Texas nah imma hold on to the 400