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Transmission problems maybe?

Colton Nichols

By Colton Nichols
in Ask A GM Technician

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Colton Nichols New Member

Colton Nichols

Posted
Posted

Alright i have a rabbit hole for anyone willing to try to chase.. So long story short my 06 silverado 1500 4x4 had the rear end lock up and when it did it snapped the aluminum drive shaft so after several horrible experiences I finally got a used rear end and steel driveshaft under the truck well now the truck has reverse and 1st but won't shift into any other gear. The colum shifter makes absolutely no chance like it doesnt even do anything. And may be irrelevant but it feels like it has a high stall or something. If I'm at 4k in first I let off and the rpms drop to idle but I can punch it and it jumps up to 4k then starts pulling again, please someone.. Everything was working perfect before rear diff locked up. 

j-ten-ner Senior Enthusiast

j-ten-ner

Posted
Posted

I hate to say it, but when the drive shaft snapped, the force may have been so violent that it did some damage to the tranny as well.

I'd go to a tranny shop and have it checked.

 

so long

j-ten-ner

Doug_Scott Senior Enthusiast

Doug_Scott

Posted
Posted

No doubt the sudden lockup broke hardware inside the case.  You have understand that for a split second the output shaft and every part slined to it, plus the active clutch packs, all the way to the internals of the torque converter did an instant stop.  What you are feeling now is how the overrunning or one way clutch is used in low gear when not in manual low.  You have no engine braking when in drive, but when in manual low you have engine braking.  This is how it is supposed to work, it makes it more pleasurable for soccer-moms to not feel the downshift to low gear at 2 or 3mph.

 

Doubt your warranty will cover it.  Did you find out what caused the lockup?  Was it the cross shaft pin?  If so, was the retaining bolt missing? 

Colton Nichols New Member

Colton Nichols

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Yes the pin came lose and turned into a candy cane. But the bolt was nowhere to be found. It shattered several gears ripped both c clips out and tore all the limited slip stuff out. I contacted the guy who rebuilt it and he's cutting me a deal and redoing the trans again for 700 removed and installed. So I'm carrying it up there this week. Said he thinks he knows what it is

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