Building a 4l60E

[SShanks]

The tranny cooler lines are close, but you can bend them to fit--just don't kink them--or you'll be going back to the truck that you took the crossmember from to get the cooler lines. The driveshaft will have to be custom too.

3 main things for the conversion: crossmember, driveshaft, wiring harness.

Ok...I'll keep that in mind. Where would I get the custom shaft made? If I were to get a 4l80e out of a junker, would I need to rebuild it or would it be okay stock?

[RedHeartbeat]

Any driveshaft shop can convert your driveshaft to work with the 80e. The main thing is you need a yoke to fit 80e/th400 transmissions. For a crossmember, you can buy one directly from transmissioncenter.net and you get part of your money back when you return your stock unit to them. I'm glad to see you have HPTuner software. You can send your tune to ECTune on the HPT website and he might put an 80e overlay into it for you. You can buy a wiring harness adapter from NelsonPerformance to mate the 60e to the 80e or you can rewire it. You will need the 2nd speedometer sensor wires and connection for the front speed sensor pickup. You should get a custom torque converter to mate to the 60e flexplate. Be sure to tell the builder that is what you want. Your other option is to buy a spacer and flat flexplate from early 6L engines to mate to your setup.

[bud8fan]

Ok...I'll keep that in mind. Where would I get the custom shaft made? If I were to get a 4l80e out of a junker, would I need to rebuild it or would it be okay stock?

mine is out of an '05 and all that done was a shift kit to the stock unit...

[SShanks]

Any driveshaft shop can convert your driveshaft to work with the 80e. The main thing is you need a yoke to fit 80e/th400 transmissions. For a crossmember, you can buy one directly from transmissioncenter.net and you get part of your money back when you return your stock unit to them. I'm glad to see you have HPTuner software. You can send your tune to ECTune on the HPT website and he might put an 80e overlay into it for you. You can buy a wiring harness adapter from NelsonPerformance to mate the 60e to the 80e or you can rewire it. You will need the 2nd speedometer sensor wires and connection for the front speed sensor pickup. You should get a custom torque converter to mate to the 60e flexplate. Be sure to tell the builder that is what you want. Your other option is to buy a spacer and flat flexplate from early 6L engines to mate to your setup.

OK...That answered a lot of questions. Thank You. I'm still on the fence on doing it though. 700R4 & 4L60E Automatic transmissions specialists - ProBuilt Would a kit like one on this site be better for me now. It'll be a while before I make so much power that I'll need a 4l80e. They have full rebuild kits for like $800.