ls bellhousings

[got2belucky]

hey guys, whatsup

like yall know im completly gutting a 99 chevy 2500 engine, dash, harness all of it into a 89 chevy 1500. one trick though, the 2500 is a 4wd and im keeping my 89 a 2wd. ive got a guy who wants to trade a nv 4500 2wd out of a 92 1500 for my 4wd off the 2500. there both nv4500 tran. but dose anyone know if the old style bellhousing will bolt to the 99 6.0l. he sais it will but i dont know if i should trust him. his also has a external slave cylender and mines internal will that matter.

[sandking]

Thats the good thing about GM, they all fit!!! I would say yes, it will fit, but I have not personaly done that swap.

[r6z4o6]

I doubt it. The T-56 from an LT1(Gen II) will NOT bolt up to ANY LS(GenIII) motors. Gotta have T-56 from 98+ Fbody with LS-1, as an example.

[George C]

I doubt it. The T-56 from an LT1(Gen II) will NOT bolt up to ANY LS(GenIII) motors. Gotta have T-56 from 98+ Fbody with LS-1, as an example.

wrong, the bellhousing is the same, its the input shaft that is different

all GM bellhousings have same bolt patterns

[RedHeartbeat]

Well, to a point. The patterns are similar but one bolt hole doesn't line up from the Gen1 to Gen3/4 conversions but it won't kill anything on a Chevy/GMC engine. Buick, Olds, Pontiac has a different pattern and so do true diesel engines excluding the Olds diesels.

[Botlfed]

what they said......he still needs an answer, i coulndt tell ya 100% man, but i dont see why they wouldnt bolt up.

[RedHeartbeat]

you may have to get a custom pilot bushing made for the crankshaft. The early 6L engines have the same length crank as the old Gen1/2 engines. The trans will bolt to the 6L minus one bolt hole.

[George C]

the bell will bolt up but not sure on the splines

[got2belucky]

yeah, i heard that about the crankshaft spacing being different but i think the 99 is the proper length. anything after that im pretty sure you have to obtain a crankshaft spacer. i was told any machine shop can mill one out of brass.
thanks for the info guys just wanted some more trustworthy opinions. i guess ill trade the guy and bolt it up. ill let you know what happens. hopefully i wont be pulling a pressure plate out of my leg lol.

[92 6.0]

Not sure if this will work for your swap but heres a part number for a pilot bearing for the non ls trannys. 12557583. Im pretty sure its a gm number.