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Go Back   Chevy and GMC Duramax Diesel Forum > Chevy / GMC Duramax 01-04.5 LB7 Forums > 01-04.5 LB7 Duramax Powertrain
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01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect

 
       

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Old 05-23-2008, 08:37 PM   eBay Motors   #1 (permalink)
gl4787
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getting rid of trans limp...

My '03 goes limp whenever i hit about 80. is there anything anyone knows of besides building up my trans to prevent this from happening?
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Old 05-23-2008, 09:29 PM   eBay Motors   #2 (permalink)
GmcLbz
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Have you changed your fuel filter lately? What mods?
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Old 05-23-2008, 10:52 PM   eBay Motors   #3 (permalink)
BigRedChevy
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What type of limp is it going into?
2000 rpm rev limiter or stuck in 3rd gear?
How many miles?
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05 Chevy LLY Crew Cab LT Dually 4x4 with lots of go fast goodies!!!
Suncoast Tranny, TTS lift pumps, 5" straight pipe, and much more!!!
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Old 05-25-2008, 10:53 AM   eBay Motors   #4 (permalink)
gl4787
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it's trans limp. yeah, locks into 3rd when i get around 80. i got about 80k on her and i really don't wanna get a trans, and neither does my girlfriend if ya know what i mean...
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Old 05-25-2008, 01:20 PM   eBay Motors   #5 (permalink)
Maverick684
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There is really not much you can do other than backing off the extra power or building the trans. When you start getting close to those higher speeds you will just have to baby it extra carefully!
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05' Dmax LLY CC SB, 6in. Fabtech with Heavy duty tie rods,
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Old 05-25-2008, 06:34 PM   eBay Motors   #6 (permalink)
GmcLbz
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What mods do you have done to the truck?
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07' GMC CC/SB Diamond Eye direct downpipe, 4" Mbrp DP back, Airaid CAI w/Amsoil dry filter and prefilter, fingered and blocked, Transgo Jr, UDP tie rod sleeves, Cognito braces, H2's w/285 BFG's, Airdog 150, EFI Live, Autometer phantom boost and pyro
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Old 05-25-2008, 07:52 PM   eBay Motors   #7 (permalink)
duramaxchris06
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i dont understand why your trans would be going into limp mode at 80 mpg..doesnt make alot of sence to me
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Old 05-25-2008, 09:59 PM   eBay Motors   #8 (permalink)
BFTLB7
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mine does the same thing, when in acclerating to fast once i hit 80 i loss over drive then i reprogram my PPE, but if i ease in to it i can go over 80 no probley
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Old 05-25-2008, 10:13 PM   eBay Motors   #9 (permalink)
BigRedChevy
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When you are in OD the line pressure drops in the transmission letting you slip it much easier. The only fix like stated above is either build it or back the power down. Every time you do it the clutches burn a little more and it will just be even easier to do the next time. Eventually you will have to rebuild it but if you back the power down you can make it last a while.
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05 Chevy LLY Crew Cab LT Dually 4x4 with lots of go fast goodies!!!
Suncoast Tranny, TTS lift pumps, 5" straight pipe, and much more!!!
Send me a PM if you want more info on my mods.

EFI Live Tuned by IdahoRob!!!!

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