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Jun 8, 2008 | 08:04 PM

#21

BlackGMC

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From: Fort Worth - TX

Quote:

Originally Posted by trever1t

at the peak of the spike it looks like the input rpm jumps 1000rpm in relation to the output which rises a few hundred.

Input speed at peak:5384.5rpm
Output speed at peak:2621.0rpm
2nd. gear, unlocked

Sounds like tranny slip to me.... But then again I am no expert... What is the relation ship when it is not slipping, I think I read it should not vary that much 50 to 100 rpm....

Jun 8, 2008 | 08:45 PM

#22

trever1t

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From: NorCal

Is the line pressure drop causing the slip or is the slip causing the line pressure drop? Logic would dictate that the former is the issue, so why is my line pressure dropping when i am commanding 90+ ?

Jun 8, 2008 | 08:50 PM

#23

BlackGMC

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From: Fort Worth - TX

Quote:

Originally Posted by trever1t

I dunno, I would contact the Gurus at FLT....

Jun 8, 2008 | 10:36 PM

#24

Stoichiometric

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From: Way out there

Do you have a base pressure table for 3>2? Compare to a log going 2>3 and see what the signal pressure does.

Jun 8, 2008 | 10:40 PM

#25

trever1t

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From: NorCal

yeah, I do...I'm too tired to look at it right now but I know I don't have any flare...more in the morning, my old eyes are burning!

Jun 9, 2008 | 05:15 PM

#26

Wilde Racing

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From: Behind the TIG welder

Quote:

Originally Posted by Mort

I have a Transgo HD2 shift kit installed in the 4L80E and my shift times are all set to zero to turn off adaptive learning in the pcm. That is what I read to do at the time I put the shift kit in and I have been driving it that way since May 2006.

Not sure about the write entire application to get it to take. First time I have heard about that.

I have heard you need to write entire to "start over" the adaptive learn shift ****....

Bill, you don't have any T.M in there do you?

Jun 9, 2008 | 05:28 PM

#27

trever1t

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From: NorCal

none that is visible to hpt. weird, sometimes i think the less I know the better off I am.

Jun 9, 2008 | 05:43 PM

#28

dkota1968

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From: Cape Cod, MA

Im having similar issues but I dont have any tuning software to log anything, subscribing to this thread its irritating the **** outa me. D-1 and D-2 is making the truck not want to go anywhere but not any of the other times when WOT. I may have a tuner look at it. Mine is stock mostly, doesnt event have tuning(CAI and Cat-back only).