Duramax/Allison downshift?

[hatzie]

Originally Posted by 1976gmc20

Thanks. Last I heard she was just going to take it home and drive it. She's thinking about hooking up the gooseneck with a load of horses or something and go drive up the nearby eleven thousand foot mountain pass to see if she can replicate the symptoms.

Don't think I'd take a trailer full of live animals on a drive like that without a backup tow machine following me.

If she got a slug of bad fuel it's entirely possible to have strange symptoms from the PCM frantically modifying parameters to fix it.

[1976gmc20]

Originally Posted by hatzie

Don't think I'd take a trailer full of live animals on a drive like that without a backup tow machine following me.

If she got a slug of bad fuel it's entirely possible to have strange symptoms from the PCM frantically modifying parameters to fix it.

Or some other fuel system problem. It is frustrating when one minor problem can now (well, last 20 years or so) create a bunch of other unrelated problems.

She literally lives at the foot of this pass. So she could drive up to the top and turn around and come back down the same way, or turn around at one of the pull-offs part way up the ten mile or so grade. I agree dead weight would be better.

(sorry I don't have notifications turned on and I don't check in here very often anymore)