Used to go into Orielly's to get transmission filter when I serviced my tranny on my 1995 Chevy 4x4. Same crap, year, make, model, 1/2 ton?, reg cab/ e-cab, and so on. They always wanted to know what gears it had in it. Used to really piss me off. Told them it didn't matter, get me the filter and I'll tell you if it's right or not. They wouldn't do it. So I gave in and told them what gears it had in it. (it had a 6" lift and I had re-geared to 4:56) It's got 4:56s in it. Talk about smoke comin off the keyboard on that one.