A TH400 can use the 200-4R crossmember and driveshaft, as long as it's a short tail TH400. You will have to swap the yoke on your driveshaft for the 400 one.
pontiac 400
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The 2004R trans uses the smaller TH200c and TH350 trans output yoke, not the larger one from the TH400. Both transmissions do use the same crossmember.
The 86 2004R trans is much better than the 81-85 transmission and will hold up fine behind an all stock 400 from the 70's. You will be fine except that you need a torque converter from a TH200c or 2004R that came behind a Pontiac 265/301 or a chevy V6 or sbc v8. You can make it work with the Olds/Buick torque converter but it will not sit properly against the crankshaft and will cause problems for the input shaft and front seal down the road.
You need factory motor mounts from an A or G body (or even early B body) that came factory with either the 265 or 301 Pontiac V8. These were available in Pontiac and Buick cars from 78-82. These are also the same car that you buy your radiator hoses and etc,. from when you put the engine in.
Good luck!
--Kris
The 86 2004R trans is much better than the 81-85 transmission and will hold up fine behind an all stock 400 from the 70's. You will be fine except that you need a torque converter from a TH200c or 2004R that came behind a Pontiac 265/301 or a chevy V6 or sbc v8. You can make it work with the Olds/Buick torque converter but it will not sit properly against the crankshaft and will cause problems for the input shaft and front seal down the road.
You need factory motor mounts from an A or G body (or even early B body) that came factory with either the 265 or 301 Pontiac V8. These were available in Pontiac and Buick cars from 78-82. These are also the same car that you buy your radiator hoses and etc,. from when you put the engine in.
Good luck!
--Kris
bigjake34452 said:
If your on a budget why not go for an LS drivetrain out of a 98 or 99 Camaro or Trans Am. You should be able to find one of those fairly cheap and it we be reliable with decent fuel economy... Just a thought...
I know most things are pretty expensive in the detroit area (I've got a friend here in the tent with me from there) so your idea of a budget may not be the same as the author of this thread.
LOL most guys around here mean 200-300 dollars when they say they need to do something on a budget!
An LS is okay if you like modern chevy power (or GM powertrain) but you can't get that swap done for less than 2000 dollars unless you get the engine free.
You'd have to get the right mounts, new driveshaft, and don't forget the wiring for the fuel system. You might be able to fab all the mounts and wiring yourself, but most people can't.
Did you do the LS swap yet? If you did, some pics would be great to help out the other guys.
LOL most guys around here mean 200-300 dollars when they say they need to do something on a budget!
An LS is okay if you like modern chevy power (or GM powertrain) but you can't get that swap done for less than 2000 dollars unless you get the engine free.
You'd have to get the right mounts, new driveshaft, and don't forget the wiring for the fuel system. You might be able to fab all the mounts and wiring yourself, but most people can't.
Did you do the LS swap yet? If you did, some pics would be great to help out the other guys.
Not yet, but one day I would like to do one.. My G Body has a turbocharged 454 crate motor swap... I have a friend of mine that did an LS swap into a 87 Trans Am with a TH400 and installed a turbo also..
I haven't figured out how to get pics on here yet, when I do I'll post some...
I haven't figured out how to get pics on here yet, when I do I'll post some...
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