Ok Folks, here is my situatons. I went to the junk yard yesterday looking for 2 R154's for both my Supras. I found 6 trannies. No my issue is how the hell do I tell the difference between the R154 & the W58? I looked for model #, found none. All the cases were blank...there were differences visually, but I could not tell which was which. Can someone tell me how to spot the differences in the two? Because I'm going back as soon as i find out. Thanks...