Will a 99 4l80e work in my 03?

[Bladeboy1998]

I found a used 4l80e for 300 but it's from a 99, I have an 03. Mine is totally dead, lost reverse in October and now I only have first so I need to get it fixed now. I can only find stuff about 97 into an 02, which doesn't help me really. Thanks know you guys

[Bladeboy1998]

Correction it is a 98 4l80e out of a suburban 2500, I want to put it in my 03 2500hd 6.0

[izzy_Britton]

i am not an expert by any stretch of the imagination... so take all of this with a grain of salt. I could be very wrong.

my understanding is that the 4l80e is fundamentally the same inside and out from like 1993 to end of production.. so it SHOULD work.

i recently ran into an issue (indirectly) where a 1996 4l80 wouldnt work completely in a 1993. i dont know why, yet, but it was a used transmission and i have a feeling that the trans was maybe bad?

if the trans that your buying is used, is there a warranty of any kind? what if you install it and it is a bad trans? can you take it back and get a full refund or is it for exchange only? i ask because if the price is right it might be a gamble. or just have your current transmission rebuilt locally?

just thinking out loud.

[AMERICAN PICK-UP]

Originally Posted by Bladeboy1998

Correction it is a 98 4l80e out of a suburban 2500, I want to put it in my 03 2500hd 6.0

We are a full service salvage yard....we have hollander interchange...hollander says that the older one will not work...it must be from a ls engine... 99-07 will work...The older 4l80e does not have a bolt hole in the 12 oclock position.... they 4l80e out from behind the ls engine has the extra bell housing bolt in the 12 oclock position...

[Bladeboy1998]

Well that answers my question then, thank you guys! Guess I'll keep looking.

[kdh454]

Comment above is correct, the 98 will be missing the top bolt hole, but will still work, you just wont be able to put a bolt there.

The 97-99 models have the late style cooling ports (same as 00+). A 96 or earlier 4L80E will have two ports towards the front of the transmission, which would require you to re-route your cooler lines.

[izzy_Britton]

The bolt hole won't make a bit of a functionary difference. Gm made similar changes to the 4L60 bell housings.