how do i find out what tranny i have its an 03 5.3 scsb with an auto tranny everyone seems to have the 4l60e but in my papers it says i have an 4l65e, anyone know how i can find out for sure without pulling the tranny?

 

There is a sticker on top of the trans...maybe with a mirror you could see it. It will have a 3 digit code. Also externally the 60e and 65e are the same. The internals are the only difference. There may be a 3 digit code in the glove box but you'll have to call the dealer to find out which one it is.

Dave

 

On the sticker it should say 3KZD if you have a 65. You can also look on the back of the case by the pan rail where the tail housing would bolt up. It's a little hard to read because they stamped these cases with a bunch of dot's. But the first four digits will read 3KZD as well if indeed you have a 65. Vince

 

"M30" code will be for the 4L60e. Check in your glove box but most than likely it will be the 4l60e, unless otherwise.