Which crossmember would I be able to use on my car after installing a 2004r?

 

You would use the crossmember that came with your car. The older A body used one crossmember for all their trans. You just line it up where it needs to be may have to drill holes in the frame if it doesn't line up with the factory holes.

 

The 200-4R puts the crossmember in exactly the same place as the TH400, which was optional in your car. The holes are already there. Just bolt it up.

 

Thanks guys. I wasn't sure if I could use the original one or if an aftermarket one was required...

 

I dont think that is accurate. It may be similar fit for all transmissions available, but I beleive there are different crossmembers.

 

I was thinking of 68-72 all the one I have seen look the same, I maybe wrong, but I know he won't have any problems putting the 200r4 in with his crossmember. The late 70's used a different crossmember all togather. You go into the 80's the G body cars they had two crossmembers one for three speed auto and four speed auto. The mid 70' I think had two one for single exhaust and one for duel exhaust.

 

Regular open framed A bodies 64-72 all used an interchangeable trans cross member. convertibles were different; 64-67 interchange (although 67 uses a different PN); similarly for 68-72. The boxing of the frames changed in 68. Through 67, there were ears welded to the inside of the box; in 68 they went to a stamped in shelf in the box. The regular member was 54-13/16" long; 383698 for 64-66; 411238 for 67-72. The only difference I have seen is that on the rear vertical surface to the left of center there are two holes on the early part, and an oval slot on the later one.

 

I have two distinctly different crossmembers. One is for dual exhaust and one that was taken out of a 4 speed car. Two very different peices.

 

Yes the conv. had a different crossmember and some 72's had 73's frame so they would have a 73-77 crossmember. I guess when I said one crossmember I should have said you can use the same crossmember for different trans.

 

All 64-72 cars came with double hump crossmembers. Olds used stamped "hat section" crossmembers, Chevy used tubular crossmembers, but they are interchangeable. As noted above, the cars with boxed frames used narrower crossmembers. All 64-67 interchange (allowing for open or boxed frame) and all 68-72 interchange. Unlike the 1980s cars, different transmissions did not use different crossmembers.

 

The single hump crossmember came about with the death of the dual exhaust option in 1975--the catalytic converter. If you have a single hump crossmember, it will be 75-up. You could still get duals on your Cutlass with branched manifolds in 1973-4, and a 4 speed, iirc, so all the crossmembers allowed for that. I don't know about the 80s cars, and little about 73-up, but the first post was about a 72.

 

I do have a dbl hump crossmember, so it appears I'm in business....

 

I have this asked on another thread, but will a '73 TH350 bolted onto a '72 crossmember throw the engine alignment off? (i.e. down) Trying to figure out why the motor sits about 1" too low in the front. Yes, there is some space between the bottom of the oil pan and the front crossmember. Unless someone put in a diffrent tranny crossmember, I'm stymied. Chumley

 

Did you ever work this out? If all else fails, you can buy aftermarket cross members from PAW (cheaper than J.C. Whitney) f/ either trans. and f/ the motor mounts also. It is alot of $$$ to be spending if your's works though. (about $85.00 a piece) Does the height have to do w/ the mount or the cross member?