My truck is doing some crazy things.sometimes crusing along in 5th gear it will act like i took and shifted it into neutral,as soon soon as i let off the gas and hit it again it is fine and i have noticed it does it when i hit rather large bumps,it only does it in 5th gear and a few other things sometimes it says range shift inhibited,when its cold and not given enough time to warm up it will not shift out of first,and sometimes if I run it kinda hard it won't shift into 5th at all and when I stop and take off again it is like its stuck in 4th gear or like it has a big stall converter? But when it does that I can stop and cut the truck off for about a min and start again and it's all great!! I never use 4wd but yesterday I locked it In and went to take off and it was like the transfer case was slipping it will go but it feels like it would riding a bycycle with the chain loose , thanks in advance for any insight into my problem
04 lb7 trans problems HELP!!
- Thread starter JrsD-max
- Start date
Welcome to the forum. :welcome2:
Oriellys or Auto zone should be able to put any codes you've got for free. If not I'm sure it would cost that much for the dealership to do it.
Do you have any friends with a Tech2 or EFI live V2?
Yellowchevy
Oriellys or Auto zone should be able to put any codes you've got for free. If not I'm sure it would cost that much for the dealership to do it.
Do you have any friends with a Tech2 or EFI live V2?
Yellowchevy
Why are you in the wrong section anyways? If you don't have a CEL; no parts store code reader will likely read Allison TCM codes.
It could be a few different things. If no codes are present, i suggest trying to start with taking the connecter off the NSBU and blowing it out/ cleaning to see if the situation gets any better or worse. Then report back with findings
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:thumb: thanks for the welcome, I apologize if I posted in the wrong area,new to this and my first diesel truck, just looking for a little help. Parts store where I live don't do diagnostics anymore? But my mechanic that fixed the fuel lines on the truck has top of the line machine to read the codes,I had spoken to him about this problem but he advised me I should speak to someone that is more familiar with Allison trans. I can have him read the codes Thanks guys
Welcome to DuramaxDiesels! Congrats on your first diesel. Get them codes pulled and we can go from there helping you. When was the last fuel filter change?
I have codes :thumb: 1st one t0735 I think it said incorrect 5th gear ratio
2nd one p0843 trans cylinder pressure switch c circuit high
2nd one p0843 trans cylinder pressure switch c circuit high
Do these transmissions take a certain kind of tranny fluid, and if so Could it have affects on the trans if it had been serviced with the wrong fluid?
JrsD-max: If you have the codes, listed in order, as Mike L requested you can now
Call Mike Lovrich direct at his shop "Inglewood Transmission Service". Mike is "THE" person to contact with questions about allison transmissions. He can be reached at (714) 870-7300. His shop is physically located in Fullerton, California. Mike will help you with your problems.:cool2:
Call Mike Lovrich direct at his shop "Inglewood Transmission Service". Mike is "THE" person to contact with questions about allison transmissions. He can be reached at (714) 870-7300. His shop is physically located in Fullerton, California. Mike will help you with your problems.:cool2:
Thanks great white I live in a very small farm town in alabama and I have searched around home for a trans shop that could help...no one I have called seems to have a answer. I sure would be so greatful to try n get my baby fixed she is just sitting in my drive way the issue has gotten severe its not drivable anymore sometimes it will not even take gear