So heres the situation. just installed my drop shackles on the 05 monday, and everything was fine. but yesterday i began hearing and feeling a vibration for about 10 ft off the line when i give it gas then it gos away. was not doing it before so its sence the instalment. shackles are correctl. and properly torqued. a guy at goodyear said it may be the change in the pinion angle causeing a bind up with the differentual, i need so input guys any and all will help.

 

Check the rear u joint

 

the change in pinion angle could have brought up and issue that was already there, but honestly I have had no problems with mine. so yea, check the u-joints

 

I agree with all the guys above including the Goodyear Tech

 

yeah when they put the truck on the lift there was oil all around the rear of the drive line where it connects with the pinion seal im thinking it was already wearing because most of the oil was caked and thick and theres no puddles in the garage so maby its just that time, 87,532 miles what do u think

 

pinion seals often leak just randomly. doesn't mean anything is bad other than the seal. that would just make me check my level more often. but with that many miles, and depending on how it was treated in the past, it wouldn't surprize me that you would need some things here and there.

 

yeah it just really raises an eyebrow, to say the least, i mean id rather bring it back up one inch and save a possible disaster, the shop guy said cause when you lower the truck it pushes the drive shaft deeper into back of the trans, causeing the binding in the rear end u joints up