stroked out Posted January 28, 2008 Report Share Posted January 28, 2008 liek is says in the title i was wondering if the 4l80e swap would through out the driveshaft alinement? the tranny is longer and requires an shorter drivesaft. the reason i ask this is becasue at 140 km/hr i get a vibration which i never got before. the truck has stock ride hight and the tires were rebalanced. so i duno maybe if i lowered the truck it would set things right? tell me if im wrong or if there is a way to tell what it could be Quote Link to comment Share on other sites More sharing options...
desrtrat Posted January 28, 2008 Report Share Posted January 28, 2008 how much shorter is the drive shaft? if it's a inch or so, it should not be much of a issue. when i had my rear end replaced there was a vibration that was not there before also. dealer took the drive shaft off the rear and rotated it 180* and reinstalled it and it went away. so you could try that first.. good luck Quote Link to comment Share on other sites More sharing options...
zippy Posted January 28, 2008 Report Share Posted January 28, 2008 The driveshaft is shorter, but not shorter than a regular cab runs. You likely have one of the two driveshafts out of balance. The front is also now longer and could be your problem. Quote Link to comment Share on other sites More sharing options...
stroked out Posted January 28, 2008 Author Report Share Posted January 28, 2008 good points i'll check that out..thanks Quote Link to comment Share on other sites More sharing options...
04CHASE Posted January 29, 2008 Report Share Posted January 29, 2008 also check your pinion angle. Quote Link to comment Share on other sites More sharing options...
SS_bnoon_SS Posted January 29, 2008 Report Share Posted January 29, 2008 also check your pinion angle. Since the driveshaft angle changes with a shorter shaft, I'll bet this is it. Quote Link to comment Share on other sites More sharing options...
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