2012 1500 silverado ltz- 6L80 3.08 rear "wrapping" ?

[Hwoody4136]

Weird issue:  ONLY on medium to hard acceleration from a stop I get what feels like the rear rotating or "Wrapping " on the leaf springs.  NO noises, No vibration, No clunking at any speed. 15 mph to 100.  Actually, if you are going 15 mph or more and hit the throttle it doesn't happen.  10 MPH or less it's every time you hit the throttle.   You literally feel the dull thud in your seat.  Mild acceleration from a stop is fine.  It also doesn't make a difference if you are going straight, left or right, it is still there ONLY on acceleration from a stop.  Any ideas?  

[dna9656]

I don't know what causes axle wrapping besides more power than the suspension can handle so if that's true you must have very weak springs or a whole lotta power. Are you habitually stomping on the gas when you drive? If so don't do that...or get your springs checked by a professional shop.

[Hwoody4136]

I baby this thing terribly.  We have had it on a lift and checked all mounting points, which are good, u joints are good  serviced rear and all looks good. Checked backlash which also was fine.  I have not updated the slip yoke yet but that's next.  ??????

 

[It's Tim]

Slip yoke is dry

[dna9656]

17 hours ago, It's Tim said:

Slip yoke is dry

WOW! I had no idea a slip yoke could do this! How's that happen please? I genuinely don't get this!

Edited November 13, 2021 by dna9656