91 k2500 4l80e wiring harness to 98 4l60 plug

[Billys44s]

Hey everyone.

I just got done swapping my transmission on my 91 k2500 and i ran into a issue with the wiring connector,

I bought a 98 k1500 4l60e to swap into my 91 k2500 and the plugs dont line up so i got the plug for the 4l60e to hook up and i was hoping someone can tell me which wire goes were.

I read alot of diagrams online but i cant find one for my 91 connector so if you can help i'd appreciate it

 

[NickG80]

I don’t think a 98 4l60e can be controlled by your ECM.

 

[PlayingWithTBI]

I don’t think a 98 4l60e can be controlled by your ECM.

Yeah, could be. 91-93 HD trucks used the 7060 or 7470 PCMs the (88-91) used the 7747 ECM or some 87-92 HD came with the 8747 ECM

So, which trans and computer do you have?

https://www.monstertransmission.com/4L60E-vs-700R4-Transmission_ep_113.html

 

[b454rat]

Why are you going from a 4l80 to a 4l60?? Seems like a major downgrade.....

 

[Billys44s]

Why are you going from a 4l80 to a 4l60?? Seems like a major downgrade.....

Preferably i'd rather have the 4l80 over the 60 but the 4l80e took a crap before i bought the truck and the 60 was the only trans i found since 4l80e are hard to find where i live lol.

The 4l60 was a pain in the ass to mount up especially since the converter bolts didn't line up but im hoping i can get the 4l80 rebuilt sometime down the road.

And on the ecm how do i tell which i had?
Would it be on the sticker on the ecm?
I haven't look at a ecm in a year so my knowledge is kinda bad right now

 

[PlayingWithTBI]

And on the ecm how do i tell which i had?
Would it be on the sticker on the ecm?

Yes, there should be a sticker on it with the service #.

You must be registered for see images attach

 

[Billys44s]

Thats all i found on it

You must be registered for see images attach

 

[b454rat]

Cant find a 2wd? Or one out of a van? Van ones have fully splined output shaft that can be cut down to same length as a 4wd.

 

[Billys44s]

Cant find a 2wd? Or one out of a van? Van ones have fully splined output shaft that can be cut down to same length as a 4wd.

Cant find one at all, closest thing i found to a 4l80 is a th400 2wd but i only jump on the 60 because it had a rebuild and it was cheap enough for me lol

I mainly deal with 2wd truck i have another truck its a 92. Chevy extended cab with the 4l60 in it and it drives ok but it hesitate in reverse and at 65 it at around 2500 rpm i don't like the 60s that much but its all i had.had.

I honestly rather have a nv4500 like my 92 gmc had but havent found one cheap enough to swap

 

[Billys44s]

I'd read online that in the 98 4l60e they also run of the speed sensor to shift properly.

Now i seen a youtube video that the 4l80e has 2 speed sensors idk if thats the case but if it has 2 how would i make them into 1?