knocking sound coming from around transfer case only when decelerating

Asked by May 19, 2013 at 04:50 PM about the 2001 Dodge Ram 1500 2 Dr SLT 4WD Quad Cab SB

Question type: Maintenance & Repair

it only knocks when decelerating in 2wd it knocks continuously when accelerating and
decelerating in 4hi changed transfer case with used one from junkyard supposed to be
good. dropped rear drive shaft it quieted down a lil changed all ujoints and had both
differentials gone thru they are good. Dont know what it is

3 Answers

answered 4 years ago

Have you got like a jillion miles on this? have you put new hypoid oil in there recently? are there shims that you can put in aside each bearing to reduce the axial play?

answered 4 years ago

144,000 miles, never heard of hypoid oil, did not see any shims for axle

answered 4 years ago

....well you owner's manual will call for "gear oil" used to be "hypoid gear oil" which is designed for these applications....used to be....also the shims either side of the bearing were there on all the differentials I've worked on---must probably have them, especially if the gear assembly has any hint of axial play (back and forth movement)~ not sure what you're using for gear lube if not 80w-90 hypoid gear oil--?

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