Quad Cab DuraMax build

[bob91yj]

Pump rub through is on the transfer case, not the Allison transmission.

[ericvs]

Pump rub through is on the transfer case, not the Allison transmission.

Isn't it the issue with the transfer case that bolts to the Allison? Do the non-Allison gas truck transfer cases also suffer from pump rub?

[bob91yj]

Never seen it happen on a half ton.

The transfer case is a New Venture unit, totally separate from the transmission. Seven years at a GMC dealership, I've seen about a dozen tcases with this condition.

[bfdiesel]

It only happens to the NV261/263 used in the HD drive train trucks. The only issue that may come up with the Allison that year on a stock powered engine is the Neutral Backup Safety Switch they are a know weak point. Very easy to fix though.

[DoMiNiC1]

AWESOME information guys! Thanks!

I work for a major privet University; I sit in my office with two 18in monitors in front of me. For the last two weeks I have been neck deep reading about Duramax's... Read a ton on the injectors and think I have a game plan to keep them happy for as long a possible. When I was building my turbo eclipse I read about "crank walk" and worried myself about it for the first year I had it, I was just waiting for it to let go, however after about a year I quit and beat the crap out of it without worry. I feel the same way now about the injectors, I don't want to push it; hell I dont even know what happens when you smash the gas, to scared. lol. I think their should be a medical name for my complex " that of neurotically worrying about you car/truck". lol. Last night I smelled the oil and I could not tell of it smelled like diesel, I was out there for 20min sniffing my dipstick (gigity) it was right at fill mark. Did the paper towel test; another 20min examining the towel in the light. Looked fine, I think... Sorry for rant...

Passion for cars, blessing/curse.

[bftank]

haha you've got the disease!

i did the same thing with the vp injection pump on my 2001 cummins. eventually i sold it and now i am a nuerotic mess over my powerstroke.

[tombodad]

Yep. Wait, what's that noise? Did you feel that? Oh man, I missed a grease point, I'm sure.

But, you don't have the disease.

You have the diesel-ease.

[locrwln]

I feel your pain. I bought my '02 PSD and promptly got on the internet and was almost sick with all of the "problems" I could look forward to. Had an oil leak (o-rings) and the CPS, that's it. I say enjoy the truck, do the PM and drive. Good luck on the sickness, I own two diesel's...

Jack

[Scott C]

I had an 02 dmax/alli. Lost t-case to pump rub at 78k miles and injectors at 117k miles. Switched to dodge thinking that the "legendary" cummins would be better. Big mistake. Back in a 2011 duramax/alli in my 3500 cab chassis. The minor problems of the duramax is nothing compared to the other "big two".

[bob91yj]

Based on what I've seen in 7 years as a service writer at a GMC dealership, I carry a front hub assembly, tie rod and TRE and oil/fuel/air filters for spares when I go to Baja. Oh, I have a spare front axle shaft too, only because I could get a complete assembly at Napa for $50 (my price) plus the core charge. Rare that I see one fail, but for that price I figured what the hell, why not!