Gearing on the 200-4r is 1st 2.74 2nd 1.57 3rd 1.00 4th 0.67
If it is a 200metric 3spd, dont bother.
There should be a tin or aluminum plate riveted to the trans with a 2 or 3 letter code denoting make and model, and a # code for the date, I think. I found a site to decipher mine once. I think it was the Buick GN site.... I'll look for it.
If it is the OE AOD from the SS, it should be an excellent candidate.
