Hello,
New to the forums here. I try and do a lot of research before asking many questions so hopefully I haven't missed anything on this.
Bought a 2002 duramax two years ago. Purposely bought one with "newer" injectors. Truck now has 258,000 miles. Overall a good truck for its age. Starting to show it though (new T-stats needed, transfer case half replacement, and few others). Since I bought it though winters have been interesting. During the winter months the allison seems to have shift issues. Almost like it gets confused about what gear its in or needs to be in. Hard shifts, limp mode the first winter i had it (we had some really cold weather then for alabama, many days in the 20's and 30's lows in the teens and single digits) and host of weird shift problems. I know the allison's have the adaptive learning, but its always during the winter, and always the same P0700, U2104, U2105. Summers are smooth as silk and pulls my camper like a champ.
I recently finally found a decent mechanic that was worth what he charged. We've had many discussions on it. He did some work on it for me and ran his tech 2 scanner on it, hoping to help me out on the tranny. He checked balance rates and the injectors are starting take a turn for the worse so i'm saving up now for that. He suggested within the next year so that should be fun. We discussed the injectors, and are starting to try and piece together if they could be the source of the tranny issue, leaking more fuel then needed in the combustion chamber and causing the tranny to think the truck is under load (similar to pulling in tow mode). We've also checked grounds, wiring, etc. I've wondered if it could be a speed sensor, throttle positioning sensor, or something of the like. He is confused by its non-repeatable nature.
I've called many tranny shops, diesel, shops, etc with not much luck on isolating the problem. I don't want to go and start replacing stuff just on a hunch to find i spent 500 bucks for nothing. The problem is random, not repeatable at all.
The truck is not my daily driver, but i do like it and want to keep it. Comments welcome, thanks for helping.
New to the forums here. I try and do a lot of research before asking many questions so hopefully I haven't missed anything on this.
Bought a 2002 duramax two years ago. Purposely bought one with "newer" injectors. Truck now has 258,000 miles. Overall a good truck for its age. Starting to show it though (new T-stats needed, transfer case half replacement, and few others). Since I bought it though winters have been interesting. During the winter months the allison seems to have shift issues. Almost like it gets confused about what gear its in or needs to be in. Hard shifts, limp mode the first winter i had it (we had some really cold weather then for alabama, many days in the 20's and 30's lows in the teens and single digits) and host of weird shift problems. I know the allison's have the adaptive learning, but its always during the winter, and always the same P0700, U2104, U2105. Summers are smooth as silk and pulls my camper like a champ.
I recently finally found a decent mechanic that was worth what he charged. We've had many discussions on it. He did some work on it for me and ran his tech 2 scanner on it, hoping to help me out on the tranny. He checked balance rates and the injectors are starting take a turn for the worse so i'm saving up now for that. He suggested within the next year so that should be fun. We discussed the injectors, and are starting to try and piece together if they could be the source of the tranny issue, leaking more fuel then needed in the combustion chamber and causing the tranny to think the truck is under load (similar to pulling in tow mode). We've also checked grounds, wiring, etc. I've wondered if it could be a speed sensor, throttle positioning sensor, or something of the like. He is confused by its non-repeatable nature.
I've called many tranny shops, diesel, shops, etc with not much luck on isolating the problem. I don't want to go and start replacing stuff just on a hunch to find i spent 500 bucks for nothing. The problem is random, not repeatable at all.
The truck is not my daily driver, but i do like it and want to keep it. Comments welcome, thanks for helping.
