Mud-club

Vehicle & Technical => Discovery => Topic started by: burgerman on November 28, 2007, 23:12:12

Title: grinding noise on over run
Post by: burgerman on November 28, 2007, 23:12:12: , Hi all, i have a 1991 V8 disco ( manual) and i have recently replaced all u/joints in both props, a rear diff ( not for the above reason) but for a while now i have had a grating/loose sound coming from gearbox area ( it seems) It only happens when i come off the gas pedal and reamins till i accelerate again, i must admit it has got to a noise level that something is not right :( i have had a look/pull n push around under neath but not found a culprit as yet , i kinda have a feeling its a gearbox issue ? for the record the gears operate fine, and the noise is not any louder in any of the gears

Any clues ??
Title: grinding noise on over run
Post by: Range Rover Blues on November 29, 2007, 00:00:24: OIl level? water contamination?

If it's the gearbox it could just be noisy.
Title: grinding noise on over run
Post by: Guardian. on November 29, 2007, 09:13:24: mine did that, everything worked fine but made hell of a noise on overrun, it was the transfer box, put a spare one on and it dissapeared.
must have been a shot bearing in there somewhere.
Title: grinding noise on over run
Post by: Ja1983 on November 29, 2007, 19:10:21: thrust bearing?

mines paggered, but luckily the clutch has started to die too.. so dont have to put up with it much longer! :lol:
Title: grinding noise on over run
Post by: andyb on November 29, 2007, 20:53:22: It could be either thrust bearing or the transfer box.

I think I would drain the transfer box oil and see if anything comes out with the oil, while the oil is out remove the transfer box bottom cover and have a good look. This will be a lot easier than pulling the whole box and checking the thrust bearing.

HTH
Title: grinding noise on over run
Post by: extreme90 on November 29, 2007, 23:40:35: is the replacement diff a good un ?
just check the pinion for play

drain the oil off the transfer box aswel and see what comes out
dan
Title: grinding noise on over run
Post by: burgerman on December 01, 2007, 18:16:45: Now fixed, It was a kanckered front u/j :oops: I was a tad suprised though as they had done 200 miles tops :( Oh well at least its sorted for a lot less work and money than a gearbox

Thanks for the tips
Title: grinding noise on over run
Post by: Disco-Ron on December 01, 2007, 18:26:35: I doubt last sunday helped much eh!!!...;)
Title: grinding noise on over run
Post by: Ja1983 on December 02, 2007, 01:48:52: ...another uj lasting less than a tankfull?!!

did you fit cheap and cheerful or hardy spicer or genuine??
Title: grinding noise on over run
Post by: burgerman on December 02, 2007, 09:08:28: Came in a hardy spicer box :?

Think i shall have to grease them a tad more :roll:
Title: grinding noise on over run
Post by: Range Rover Blues on December 02, 2007, 16:15:17: Was it a good fit in the propshaft?

I'd think 200 miles really bad though, even if you put no grease in at all.
Title: grinding noise on over run
Post by: extreme90 on December 02, 2007, 21:15:36: i can wreck u'js in one weekend :lol: :lol:

they wernt cheap crud just been re-boxed were they ?
did it have gkn in the middle of the spider ?
200 miles is pretty damn low :shock:
Title: grinding noise on over run
Post by: Ralph on December 02, 2007, 22:27:15: Havent got catalytic convertors on has it, they sometimes make a very loud rattling,grating noise on overrun when everything else is nice and loose making small vibrations.