Rear End Id, Tranny Id?

[swervin ervin]

TUM is a 2.73 ratio. Standard rear axle only means what GM considered standard for each year, or something close to that anyway. Somebody explained this before in great detail. I just can't remember who it was. 2.73 was standard in 85 also.

On another subject, have you thought about reducing the size of your photos. A lot of folks on here are on dialup and it kills them to open threads like this one.