Mavn

iTrader: (3)

Dlong story short, I have a 3600 stall that fits an lt1 input shaft, but fits an ls1 flywheel.. So I'm wondering if I can find a cheap lt1 style 4l60e will the bell housing bolt up to my ls, and my extremely weird stall?


Any help is appreciated!!! Thanks!

ZONES89RS

iTrader: (25)

Yea, you will not be able to use the bolt on the 1:30 position for the Trans and the 12 O clock position on the motor.

ZONES89RS

iTrader: (25)

And of course the 2 lower bolts do not exist on the lt1 trans. No different than a th350/400 swap.

Mavn

iTrader: (3)

So it won't work? :/

Circle-D_Brian

It will bolt up and the converter should work.

-Brian

Mavn

iTrader: (3)

Awesome! Thanks Brian

Iroc_Rat

Ok guys I have a(2001) 5.3 ,compuetr and wiring harness, also a 1996 4L60E. will that computer operate that 4l60E properly? or what should I do to convert it to work right? or is it better that I get a newer tranny? Thanks.

mrvedit

The 2001 PCM will operate the '96 4L60E just fine; it will work with any '96 through '07 4L60E/4L65E/4L70E.
However, your '96 with KT-style converter will not quite bolt up; you need to add a spacer on the flexplate to properly hold the pilot on the shorter LT converter. Also the flexplate holes for the converter pads need to be elongated or you install a dual-pattern flexplate.
Here are the part numbers:

Parts for LT trans on LS engine
----------------------------------
12563532 flexplate to crank spacer
19257940 bolts (need 6 bolts)
19260102 dual-pattern flexplate

However, my real concern is that if this is a high mileage, never-been-rebuilt '96 trans, it likely will not last long behind a more powerful engine. I advise getting a newer trans, especially a '03 or later so that you are more likely to get good life out of it.