Thanks, StudDuck! this one is a little rough up close, but solid.
'91 was the last of the solid axle Suburbans, and the first year of the 4L80e trans. this one is a diesel (6.2 L) and has one ton axles (Dana 60/14 bolt full floater) with Detroit Lockers and 4.10s, and disc brakes.
You're lucky you have the heavier 4L80e instead of the earlier 700R4, aka 4L60e. That thing was a piece of junk. I had it in 3 different vehicles and all 3 failed at under 120k.
yes, the 4L80e was part of the reason I bought this Suburban.
but I had to have this transmission rebuilt. reverse and overdrive went out on the same day, and the trans shop said it was two different failures. 'first year' type of crap that was fixed with upgraded parts. overdrive was not working when I bought it, but I knew it was just a throttle position sensor, fairly cheap and easy to fix, while knocking $1500 off the asking price. I added a big cooler and spin-on filter in the cooling circuit too.
I do kind of miss the lower first gear of the 700R4, though.
Guns don't kill people, drivers with cell phones kill people.
