NNBS 4L80e swap
10-23-2010, 10:49 PM
#43
tranny had to come back out for the converter/flexplate install. it was just bolted up last weekend to get dimensions for the driveshaft.
flexplate...exciting isn't it? lol
better pics of the crossmember.
added the front VSS connector
stock converter for now
So the tranny is officially installed
Just waiting on the driveshaft now. Should be finished next week. Assuming all goes as planned, it should be moving under its own power next weekend. I didn't get any pics of the wiring mod cause messing around with that TCM connector was damn frustrating lol. But I do have the whole procedure memorized now, so if anybody has questions about the GMT900 80e swap, feel free to ask.
10-26-2010, 07:32 PM
#47
TECH Fanatic
hey yall i have a question maybe stupid or whatever,but just worring....since im putting the 6.0 in my rcsb silverado,could i just use the wiring harness for the 6.0/4l80e? n the tcu as well?
10-26-2010, 07:38 PM
#48
That depends... If you are doing the entire engine/tranny swap at the same time, you could do that. But you might as well use your current PCM because you'd just have to pay to get the new one tuned. Repinning your current harness isn't too difficult.
10-26-2010, 07:53 PM
#49
TECH Fanatic
its sounds to be an headache...but if i could i was going to do them both at same time my buddy has an lift, i made a deal with him if he help me with the engine n tranny n ****,that would fix his body work n repaint his whole truck,he agree to...he know bout these trucks then i do....i was going to get a tune frm nelson ...let me get this right....in order to use the 6.0/80e harness....motor tranny tcu harness t/c 1350 yoke n driveshift n bolts other lil thing...is that it or more...oh yeah cross member fab or buy one
10-30-2010, 02:00 AM
#50
Well, the transmission and driveshaft are both in. Mechanically, everything seems to be working perfectly. Truck hasn't driven under its own power since before the transmission, driveshaft, gears and differential were swapped. There is no vibration up to about 40ish mph, haven't taken it any higher than that yet. No grinding, no whining from the gears. It sounds good
I do have a problem though, its either electrical or in the tune. There is nothing on the speedometer, and in the HP Tuners log it shows vehicle speed pegged at 158mph. This, as far as I can tell, is preventing the transmission from shifting into overdrive and not letting the converter lock up. Only thing I can think of is that I may have spliced into the wrong orange wire in the transmission connector, since GM thought they should put 2 orange wires in there. But....there have been no codes yet.
Ideas?
I do have a problem though, its either electrical or in the tune. There is nothing on the speedometer, and in the HP Tuners log it shows vehicle speed pegged at 158mph. This, as far as I can tell, is preventing the transmission from shifting into overdrive and not letting the converter lock up. Only thing I can think of is that I may have spliced into the wrong orange wire in the transmission connector, since GM thought they should put 2 orange wires in there. But....there have been no codes yet.
Ideas?