Northern Custom Cruiser

Would a trans from a 1987 custom cruiser work in a 1984 olds 98? I am very new to olds and working on cars in general so if this is an obvious answer please consider these facts and dont nail me to a cross haha

Thanks in advance!

joe_padavano

The trans in the 84 SHOULD be a 200-4R. The trans in the 87 is definitely a 200-4R. They should swap with no issues, but verify that the trans pans are the same.

Northern Custom Cruiser

Guy says its a THM 400-4R. Will that work correctly?

joe_padavano

"Guy" is wrong. There is no such trans. It's either a TH400 three speed or a 200-4R four speed. GM did not install TH400s in cars in the 1980s, so if it really is a TH400 it was not put there by the factory. That means we don't know which tailhousing length it has.

Again, take look at the trans pans to ID the transmission.

Northern Custom Cruiser

Awesome thank you joe, i dont think hes quite as informed as id wish he was so i figured id consult the experts haha. He said its a 4 speed with overdrive. Im assuming that would be the 200-4R you mentioned above?

joe_padavano

The 200-4R is the only overdrive trans Olds ever used behind the 307 in a RWD application.

Northern Custom Cruiser

Thank you much joe! You never fail me haha