'88 3/4ton automatic transmission....
 

How do I go about finding out what transmission is in the truck?

Re: '88 3/4ton automatic transmission....
 

1. look at the transmission and see what the pan looks like.

2. Check the glove box and see if the SPID sticker is still there for the codes.

My guess is you probably have a Turbo400 (no OD)

Re: '88 3/4ton automatic transmission....
 

What does the column say? D, 2,1? Or OD, D, 2,1. First is a TH400 second is a 700r4.

Re: '88 3/4ton automatic transmission....
 

I'll look at those items when I get back into town guys. Thanks so much for the responses, I appreciate it!

Re: '88 3/4ton automatic transmission....
 

I feel like a dope for making the inquiry, but getting back into messing with trucks again, sometimes I find myself at a loss......even with what would seem to be "simple stuff". So again, thanks!

Re: '88 3/4ton automatic transmission....
 

We all feel that way at times. Its always best to clear out the simple stuff that gets lost in our brain for lack of using it. Looking forward to seeing your ride.