what transmission is in a 1988 gmc sierra 2wd?

[Nick B]

i need to know cuz the tranny is goin out. thanks

 

[dan d]

i will assume it is a halfton small block. should be a 700r4

 

[troutbum]

If you can get the code off of the trany case under the truck you can check the LMC catalog, they run the numbers and can tell you exactly what you have.