What manual trannys work behind a Cadillac 500?

[OffRoad]

nv4500, T56?

i can't stop thinking about cadillac's but i don't want to run a T400.

it'd be going in a 2wd 1/2 ton. (not now, but sometime in the future, ok i'm bench racing, whatever.)

 

[mikey_d05]

No manuals were ever put behind caddy's. The crank has to be drilled.

 

[OffRoad]

ok, what's involved with that?

what transmissions could i use that would hold up to the power?

should i just run a turbo400?

 

[mikey_d05]

TH400 will be easier. I actually have an empty BOPC TH400 case sitting around.

I know you can make an SM465 work. Kert at DIY4X did. Because of that I would assume that an SM420 or NP435 would work as well.

Don't know about an NV4500, but I would guess you could do that as well.

 

[cybrfire]

any of the chevy manuals can be made to work. You have to drill the crank and install a pilot bushing. Very simple task. I did mine with the motor in the rig. It DOES NOT have to be done in a machine shop. Hand drill and a good sharp drill bit.

Adaptor plate is required between the trans and block. Some say there is a bellhousing from a pontiac that will work on the engine side but never found any information on the other side that bolts to the tranny and never found a pontiac bellhousing to look at.

 

[smalltruckbigcid]

Drilling the drank is ridiculously easy. I drilled mine with the engine assembled hanging from a chain hoist. I drilled a pilot hole 3/4 deep and 3/8ths in diameter in the center dimple in the crank. Then I drilled it out to a 5/8ths diameter hole to the same depth. Took me about 10 minutes to do and I borrowed the drill bit from a buddy. I drilled mine to make the engine fit on a dyno.
George