- Joined
- May 13, 2014
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- 13
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- 50
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- Hårlev, Roskilde, Denmark
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After a 5" lift with 5 degree Ironman caster plates I am experiencing a grinding noise from front shaft at 25-35 mph after which it fades out. U-joint bearings have been replaced.
There is a bit of free play in the rotation direction of pinions at axle and transfer, but no play in up/downward directions. We have just fittet an airlocker to the front axle - internals are in good state.
I think the problem is with the angles of the drive shaft, and therefore I would appreciate comments on my findings:
Slope of flange at T-case: Pointing 1* up (slightly toward the engine, but almost impossible to see).
Slope of drive shaft: 13*
Slope of flange at axle: Pointing 8* up towards T-case.
So that would leave me with operating angles of 12* and 5* - Is this correct?
I am having problems getting the URL for a Photo to Work, so I have posted a direct link in below.
http://s175.photobucket.com/user/sgtsinn/media/kardan_zps35e82644.jpg.html
Would a DC shaft help?
Things I have tried already:
* tried to drive with yokes in-phase ad out-of-phase. No difference
* tried to flip front DS. No difference
* tried to drive with rear DS removed. No difference
* tried to drive with both shafts with T-case locked and unlocked. No difference
Things I haven't tried yet:
* lower gearbox with spacers - could do that but would like input on operating angles first
* fit lower springs - but that would mean having to give up the achieved lift :-(
* ???
80-series wise I am a newbie trying to find a solution... all input are greatly appreciated I know there is a lot of threads around, so what I am really looking for here is help to interpreting the specifics of my axle...
There is a bit of free play in the rotation direction of pinions at axle and transfer, but no play in up/downward directions. We have just fittet an airlocker to the front axle - internals are in good state.
I think the problem is with the angles of the drive shaft, and therefore I would appreciate comments on my findings:
Slope of flange at T-case: Pointing 1* up (slightly toward the engine, but almost impossible to see).
Slope of drive shaft: 13*
Slope of flange at axle: Pointing 8* up towards T-case.
So that would leave me with operating angles of 12* and 5* - Is this correct?
I am having problems getting the URL for a Photo to Work, so I have posted a direct link in below.
http://s175.photobucket.com/user/sgtsinn/media/kardan_zps35e82644.jpg.html
Would a DC shaft help?
Things I have tried already:
* tried to drive with yokes in-phase ad out-of-phase. No difference
* tried to flip front DS. No difference
* tried to drive with rear DS removed. No difference
* tried to drive with both shafts with T-case locked and unlocked. No difference
Things I haven't tried yet:
* lower gearbox with spacers - could do that but would like input on operating angles first
* fit lower springs - but that would mean having to give up the achieved lift :-(
* ???
80-series wise I am a newbie trying to find a solution... all input are greatly appreciated I know there is a lot of threads around, so what I am really looking for here is help to interpreting the specifics of my axle...