I'm trying to find a solid answer to my question, but I seem to be confused lol...

I have a 1999 blazer 4x4 3 button auto with the 4.3l

My transmission has been slipping and has gotten way worst since.

I'm wondering if there are certain years I'm looking for compatibility, or am I good to use any auto 4x4 trans?

I'll be using my original transfer case.

 

First off - I am NOT a transmission tech, and hopefully someone who knows more than I will chime in to add to, or correct if I'm mistaken.

For these trucks, your best bet for drop-in compatibility is to find a 98-2002 4wd transmission as there weren't any drivetrain changes in that window. Likely, a 2003-2005 will work as well, but there was a minor engine and ECU refresh that happened that may affect compatibility. I think the same could be said for the 96-97 transmissions. I'd stay away from anything 95 and older those trucks used older OBD systems.

From what I've read online, a 2wd transmission might require a programming flash to work.

 

I was afraid of that... I was thinking that was gonna be the case, but was really hoping it wasn't.

Hoping the transman will find me lol

 

Finally used the right words on Google and found extra confirmation...

Trans will work, just gotta get it in...


Thanks blazerforum! Lol... Im such a tool sometimes... lol

 

Excellent! Glad you found better info than I provided. Few people know more about the S-series platform than Kyle (Swartlkk).

 

Well it's not that your info wasn't good lol... I just didn't want to get to that point and screw myself lol.

The input was appreciated either way!