My parents 01 HD2500 GMC started shifting poorly - it would rev up at idle and slam into gear. It would also not find gears like between 3rd and 4th it would rev up and then slam into gear. Feels like you're getting rear ended.
It's an 8.1 Allison combo. The transmission fluid was changed by a shop at roughly 50k miles. Took the filter off last week and it was full of metal shavings. The pan was dropped and also full of metal shavings. Unfortunately I didn't take pics. Is it time for a new tranny? Is this common with these?
FWIW; So far it has been a total Piece of SHIT. It was special ordered and bought new in 2001. It has about 75k miles on it - doesn't get driven a lot. It's had a front diff replaced under warranty as it seized up and was totally rusty inside at about 30k miles. All front accessories have been replaced to solve a squeek, that is still there somewhere. Never solved. Had a crank position sensor go out (that's a bitch to change and warranty had run out). Has had the transfer case clip failure and the transfer case went down in flame towing a trailer in the middle of Arizona. The transmission selector sensor was replaced about 2 months ago. It also burns 1-2 quarts since new. "Normal" according to GM. Those are the repairs I can think of off the top of my head.
Anyway, I'm a Toyota guy, so I'm not familiar with automatic transmission failures. Never had one have a problem.
Any advice on this? Are the Allison's from GM as poorly built as the rest of this truck? Is it worth rebuilding for $4k? Are takeouts going to be 100k mile automatics too? If so rebuilding is probably better.
Thanks for the info,
JB
It's an 8.1 Allison combo. The transmission fluid was changed by a shop at roughly 50k miles. Took the filter off last week and it was full of metal shavings. The pan was dropped and also full of metal shavings. Unfortunately I didn't take pics. Is it time for a new tranny? Is this common with these?
FWIW; So far it has been a total Piece of SHIT. It was special ordered and bought new in 2001. It has about 75k miles on it - doesn't get driven a lot. It's had a front diff replaced under warranty as it seized up and was totally rusty inside at about 30k miles. All front accessories have been replaced to solve a squeek, that is still there somewhere. Never solved. Had a crank position sensor go out (that's a bitch to change and warranty had run out). Has had the transfer case clip failure and the transfer case went down in flame towing a trailer in the middle of Arizona. The transmission selector sensor was replaced about 2 months ago. It also burns 1-2 quarts since new. "Normal" according to GM. Those are the repairs I can think of off the top of my head.
Anyway, I'm a Toyota guy, so I'm not familiar with automatic transmission failures. Never had one have a problem.
Any advice on this? Are the Allison's from GM as poorly built as the rest of this truck? Is it worth rebuilding for $4k? Are takeouts going to be 100k mile automatics too? If so rebuilding is probably better.
Thanks for the info,
JB