SM465 4 speed GMC and Chevrolet Rebuilt Manual Transmission, Upgrades and Parts| Midwest Transmission Center no hassle warranty
wording may have been misleading
understandable Doc. Just trying to help you. Dont want to see you falter. If it was out of a heavy duty truck the input and out put shafts are different size and there rear axle was a 2 speed giving the truck 8 forward and 2 reverse. with that 4 speed box.
Back in them days each division of GM...... Chevy, GMC, Buick/olds, Pontiac and Caddy had there own engines and trans and were not interchangeable. Was not until the 70's were engines and transmissions, axles and brakes became the same with in each division as shared parts. So you got to be careful about putting together different gm parts, all GM parts are not the same
Dr_evil
Banned
Dr_evil
Banned
and from the pics in here its looking like its definitely a 465
Top 11 Transmissions And Transfercase Swaps - Jp Magazine
Top 11 Transmissions And Transfercase Swaps - Jp Magazine
chunkymunky
New Member
Whoosh.
About 6 floors over my head.
About 6 floors over my head.
fett
Well-Known Member
another one for ya and its near me too
cadillac v8 7.7 engine auto gearbox special kit custom COBRA drag hot rod | eBay
cadillac v8 7.7 engine auto gearbox special kit custom COBRA drag hot rod | eBay
Dr_evil
Banned
Some good news at last
Turns out I bought an SM420 box......same torque rating as the SM465 according to the specs I found, more than enough as the breaking point is 900ft/lbs on the input
But because its an SM420...........it has a 10 spline output shaft and input shaft too! The 10 splines turn out to be 1 1/8th GM SM420 | Tech Vault | Advance Adapters
So I ran out to the LT95 in the back yard, measured the input shaft on that and guess what! 1 1/8th.....came back in, went to the R380 and measured that up....1 1/8th output
Soooooo this means with a very basic adaptor plate I should be able to mate the LT230 straight up to it and use an LT95 clutch
Turns out I bought an SM420 box......same torque rating as the SM465 according to the specs I found, more than enough as the breaking point is 900ft/lbs on the input
But because its an SM420...........it has a 10 spline output shaft and input shaft too! The 10 splines turn out to be 1 1/8th GM SM420 | Tech Vault | Advance Adapters
So I ran out to the LT95 in the back yard, measured the input shaft on that and guess what! 1 1/8th.....came back in, went to the R380 and measured that up....1 1/8th output
Soooooo this means with a very basic adaptor plate I should be able to mate the LT230 straight up to it and use an LT95 clutch
honolulujoe
Well-Known Member
that is one big engine
bet it will sound awesome when its done and fired up
bet it will sound awesome when its done and fired up
gemsdad
NOT BOTHERED.
that is one big engine
bet it will sound awesome when its done and fired up
what do you mean when it's fired up.surely you mean,if it ever fires up.
Its still only a small block
I cant wait, hope the gaskets arrive mid week if so we can try and fire it up on the floor if we can make up the inlet manifold
what do you mean make one??????
Dr_evil
Banned
Well make usually means to fabricate and one is a unit of so I'm going to fabricate one inlet manifold ?
Not quite sure whats confusing you there.....
