4l80e build fail...
10-10-2013, 10:53 AM
#21
Launching!
Thread Starter
iTrader: (5)
Join Date: Jul 2011
Location: Ft. Bragg NC
Posts: 232
Likes: 0
Received 0 Likes
on
0 Posts
Disconnect power from trans problem solved doesn't lock and doesn't try to kill the truck however also doesn't upshift.... Quick question what the sensor plug I wired in goes to the front speed sensor and the factory sensor from the transfer case plugs into the rear sensor?
10-10-2013, 09:27 PM
#22
I believe the center support has to be ground down in addition to leaving the ring off. I am not 100% sure it's necessary though.
https://www.performancetrucks.net/fo...t-drum-506779/
https://www.performancetrucks.net/fo...t-drum-506779/
So I got curious how the gap left by removing the center support sealing ring compared to the feed holes in the direct drum. I measured the OD of the center support grooves, the ID of the direct drum, and the diameter of the hole(s) that feed the inner and outer of sections of the direct clutch.
Center support groove OD = 2.029"
Direct clutch drum ID = 2.064"
Feed hole diameter = 0.157"
The gap area created by removing the sealing ring is 0.128 sqin, and the feed hole areas are 0.019 sqin each. So in short, the flow area created by removing the sealing ring is much larger than the feed holes in the direct drum. So I think this concludes that the center support does not need to be ground down for additional flow.
Unless there is something I'm missing?
10-12-2013, 02:27 PM
#25
Launching!
Thread Starter
iTrader: (5)
Join Date: Jul 2011
Location: Ft. Bragg NC
Posts: 232
Likes: 0
Received 0 Likes
on
0 Posts
Is there something in the wiring I'm missing? I have a adapter and I wired in an additional speed sensor which is in the front and the oem connector is in the back
10-14-2013, 11:22 AM
#26
Teching In
Join Date: Oct 2006
Location: Houston TX
Posts: 20
Likes: 0
Received 0 Likes
on
0 Posts
Hey did you get this sorted out yet? I think you might have a bad tune. Give your tuner a call. I did the 4L80E swap in my truck earlier this year and had the same issues. I did the tune myself with EFI live and out of my ignorance didn't perform a full segment swap. I only copied and pasted the shift tables. Anyways it was doing some of the exact things you're talking about until I fixed the tune with the full segment swap.
Converter clutch dragging the engine, terrible shuddering after 1-2 upshift, required lots of throttle to get moving, etc.
Can you shift through all the gears? I could only get mine up to 20-25 mph or so. Don't think I ever got higher than 2nd gear.
Converter clutch dragging the engine, terrible shuddering after 1-2 upshift, required lots of throttle to get moving, etc.
Can you shift through all the gears? I could only get mine up to 20-25 mph or so. Don't think I ever got higher than 2nd gear.
10-15-2013, 11:28 AM
#27
Launching!
Thread Starter
iTrader: (5)
Join Date: Jul 2011
Location: Ft. Bragg NC
Posts: 232
Likes: 0
Received 0 Likes
on
0 Posts
Well I was told that with the tune they put in its a shift pattern tune not a segment swap also was told that I didn't need the front speed sensor wired in if I used their harness who the hell knows I'm about to yank this 80e and put back a 65 and sell everything **** it
10-15-2013, 11:33 AM
#30
Launching!
Thread Starter
iTrader: (5)
Join Date: Jul 2011
Location: Ft. Bragg NC
Posts: 232
Likes: 0
Received 0 Likes
on
0 Posts
I have a harness that goes between my oem connector and transmission.... Plus it came with this additional speed sensor I bought the 80e conversion on a totaled Tahoe everything is there that he used... PCM tuner said they didn't perform a segment swap just a shift schedule tune either way the truck needs a ton of throttle to move and then shudders violently can't even get past 10mph