What trans is this?

[JirehCustoms]

This is the only tag or info of any kind that I found on this trans. It came out of a 2500 utility truck. I believe it was a 1991 or 92 but it does have a GM Remanufactured sticker on it.

[gmtech4]

i think it MAY be a THM400

 

that tag means nothing

[wierdo124]

TH400 was gone by 91. That'd be a 4L80E.

[C/K Man]

9TU is the code for a 1989 700R4/4L60 out of a full size van or Suburban. There may be some other applications for it, but it should be a basic truck 2WD 700R4.

[greenboyfrank]

since it is a 2500 im geussing it is the 4l80e

[C/K Man]

From 1988-1995, there were both light duty (7200# GVW) and heavy duty (8600# GVW) 2500's. The light duty versions came with 700R4's (4L60). Also, 4L80's do not have those tags on them, the assembly numbers and model codes were stamped right in the case.