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07-21-2006 #1
Starting The Transformation
- Join Date
- Jun 2005
- Posts
- 467
Is there a max rpm for the 80E tranny?
Mine's their street/strip version. Sent them an email but thought I'd ask here too.
Sometimes when I have my 80E software (T-Con) set to upshift at 6350, my datalog shows rpm readings up into the 6800 range.
Thanks,
Jim
Don't take a knife to a gunfight.

Half-Assed = Half-Fast
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07-21-2006 #2
Full Blown G-Machiner
- Join Date
- Nov 2004
- Location
- Roanoke, VA
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- 515
Ive seen a quote from GM of 5500 or 6500 (or there about) but Im assuming theyre talking about a stock piece as well as prolly being conservative.
Originally Posted by DeltaT
If Im reading the above correctly youre saying youve got the upshift rpm set at 6350 but data logging its showing youre shifting at 6800? If so I found the same thing on my TCI control where the WOT shifts are pretty late compared to what they are set for. On mine I want the 1-2 shift at 5400rpm but had to actually set the control parameter to 4950 to get an actual shift point of 5400.Sometimes when I have my 80E software (T-Con) set to upshift at 6350, my datalog shows rpm readings up into the 6800 range.
Thanks,
Jim
HTH.GMC Syclone (currently wrecked thanks to the typical rubber headed VA driver not paying attention to his red stop light...oh and he didnt have insurance either)
#614 11.9 @ 113
New stuff finished 08/06:
4L80E trans w/TCI PCM
Front: J&S UCA/LCA, QA1 coil overs
Rear: Caltracks/Belltech drop leaves
Empire drive line alum drive shaft
Polished 17x9 F/17x11 R ZR1s with 275s/315s
Syclone
Tow rig
07-23-2006 #3
Starting The Transformation
- Join Date
- Jun 2005
- Posts
- 467
Thanks! You read it right, I figured I'd play around with the shift set points and finally get it right. Good to see it's consistent between trannies.
JimDon't take a knife to a gunfight.

Half-Assed = Half-Fast
07-23-2006 #4
Full Blown G-Machiner
- Join Date
- Nov 2004
- Location
- Roanoke, VA
- Posts
- 515
Glad I could help some Jim.. BTW, GM says "max rpm=6000" on the 80e but there are several ppl I know of that are going well past that who havent had any issues so far.
GMC Syclone (currently wrecked thanks to the typical rubber headed VA driver not paying attention to his red stop light...oh and he didnt have insurance either)
#614 11.9 @ 113
New stuff finished 08/06:
4L80E trans w/TCI PCM
Front: J&S UCA/LCA, QA1 coil overs
Rear: Caltracks/Belltech drop leaves
Empire drive line alum drive shaft
Polished 17x9 F/17x11 R ZR1s with 275s/315s
Syclone
Tow rig



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