89-92 Burban Q?

[k5james]

I'm thinking about picking one up to be a tow/camping rig. I'm looking at picking up a 2500 with a big block. My question is, what transmission did they put behind the big block in these? Is it a 4L80e or a 700r4? Are there any special things that I should know or be aware of on these? Any help is much appreciated.

Thank,
James

 

[JIM88K5]

4l80...

 

[4X4HIGH]

The solid axle burb stopped in 1991 then came the new body style. They never had a 700 behind a BBC and i'm fairly certain the 4L80 wasn't until later. With that being said i believe it would be a TH400.

 

[cbbr]

Did they put a BB in a 4WD?

 

[GMCJason]

Did they put a BB in a 4WD?

Nope. No BB in a 4wd, unfortunately, until the newer body style. I think you could probably get a '92 BB 4x4, but, as stated, the '91 was the last of the solid front axle Burbs. It was also the first year of the 4L80E in the 2500. Previous 3/4 tons had the TH400; at least in the years your looking at.

 

[JIM88K5]

TH-400 till 1990 w/8600 up gvw.
4L80 91 on up w/8600 up gvw.