chaney1974

so I went to bolt together my LS T56 to my 1999 LQ4 and the tranny bottoms out in the pilot bearing before the tranny meets up to the bell housing? I have researched this the best I can and haven't found any real answers why? Any input would help thanks

onebadbowtie86

iTrader: (13)

The 99 and 2000 lq4 have a longer crank and I dont believe they are compatible with the ls t56.

shoeboxvette

iTrader: (6)

unfortunately you may have one of the longer Cranks that they made to work with the 4l80e trans
If you look at the back of the Crank and it extends 1/2" or so past the rear seal you have a longer Crank.

chaney1974

this motor came from a manual 3/4 chevy that's why I am puzzled on why the t56 is not working but it having a longer crank makes sense. I have been searching for some kind of bell housing adapter but no luck

garys 68

iTrader: (1)

Does the motor have iron heads? If so, it's a long crank.
Do a search here, there are old threads with pics showing a long crank and issues with the manual trans and flywheel.

iliveonnitro

I had to swap the (long) crankshaft from my '00 LQ4 to match my T56. I wound up buying a forged one after I bought a used short crankshaft, so if you want the short crankshaft, let me know.

Cobra20

The easiest way to fix your issue I believe is to convert your ls1 style t56 to the lt1 style. You will need the input shaft, midplate, and the bell housing.

chaney1974

thanks for the help guys the crank is longer, I am going with Texas Speed 408 forged assy. so that should fix my problem. I was doing mock up when I found this problem, my friend is building a Nissan 240sx coupe. this car should haul *** and we are adding spray