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Old 07-23-2012, 08:28 PM   #1
otpulling

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lly limiter

i wrote my own efi tunes for my lly 2.6 pulling truck. i have an issue getting more than 3600 rpm out of it while in 4wd low. if i put it in 2wd if will go to past 4000. i have both of the rev limiters set at 4500 but also disabled. has anyone else had this issue or how do i get rid of it? thanks for any help
 
Old 07-24-2012, 01:12 PM   #2
THEFERMANATOR
 
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Have you raised the torque limiters yet?
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1995 GMC 2500 SUBURBAN 01 DURAMAX/ALLISON 3.42 gears 261 T-case mild built trans with ALOT of help from MIKE L. PI ML converter DIAMONDEYE exhaust CORSA muffler AFE stage 1 dry filter EFILIVE KENNEDY pump
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Old 07-24-2012, 08:24 PM   #3
otpulling

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yes to the max 756
 
Old 07-25-2012, 10:58 AM   #4
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4lo shift points changed?
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Old 07-25-2012, 11:19 AM   #5
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There is a speed limiter in the TCM for 4LO. Cant remember off the top of my head how much it is but you might take a look at it
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Old 07-25-2012, 09:10 PM   #6
otpulling

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i just started playing with my shift points think that was my issue but i have yet to try them out. do you know how they should be set. if not it will just be a trial and error thing. but thanks for your help. i could not find a speed limiter in the trans though.
 
Old 07-26-2012, 08:38 AM   #7
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They tend to shift around 200 rpm higher then the set point so if you want 4000 set them for 3800 and a 4100 limiter

Sent with a Droid RAZR in one hand and 14,000 volts in the other.
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Old 07-26-2012, 08:29 PM   #8
otpulling

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okay thanks. i will give this a try
 
Old 07-27-2012, 03:22 PM   #9
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H0108 is the table I was thinking about. Its in the ECM tune on LBZ LMM trucks. But I think the limiter is already up around 40mph so that shouldnt be the issue.
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05 Silverado SS
 
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