I picked one up for free a while back from a member of the Alberta supra club. It is out of an 87 n/a supra. I keep reading 89 & up. doesn't look like it has the steel sandwich plate which I heard gives the W-58 the extra strength. Looks like aluminum. I'll try & snap some pics. I have to pull the tranny out anyways to replace a chirping release bearing. I have read all the posts about the W58 swaps. I just don't want to start tearing off the bell housing and tail shaft from the W55 and find out I'm wasting my time. Tranny seems to be in good condition, gear train turns smoothly.