Replace 4L60E with 4L80E??

[jess t]

Is this a bad swap, do the electronic controls interchange? yolk different, driveshaft length? Anyone done this? Is it worth doing (for towing approx 5000 lbs)? Will transfer case from 4L60E fit 4L80E?

 

[yevgenievich]

Good swap, but drive shafts, tcase, ecu programming are all not direct swap

 

[df2x4]

Wiring, cooler lines and the crossmember location are different as well. If you check my sig I have a link to the 60E to 80E swap thread for my '97 C1500. You'll have more to deal with if your truck is a 4WD but that thread should at least give you an idea of what you're in for.

 

[Joe Dirte]

I got my adapter harness off eBay I think. Didn't have to repin anything. Also check to make sure ur 80 isn't leakin thru the plug on the case. I went ahead n bought new internal harness and painted inside of plug with multiple coats of nail polish to seal it up. Cooler lines may be hard to find so I just got on rock auto n got set for a 1 ton van. Also you'll want to get the flywheel as it's a 6bolt instead of 3. I had hell of a time finding a driveshaft as I have ext cab short bed 1500. I've only seen 3 ext cab short bed 2500s in my life. Driveshaft is about 2 inches shorter and you'll want to drill new holes for X-member 2 inches back from factory spot. Also if yours is 4wd get the t-case linkage if you have a manual t-case and the front driveshaft. Wasn't a bad install but I also bolted it to motor n stabbed it all in at once.