Mud-club

Vehicle & Technical => Defender => Topic started by: ken110 on July 09, 2007, 10:39:51

Title: loud grating sound down from 70 to 60mph
Post by: ken110 on July 09, 2007, 10:39:51

as the title suggests, I've got a really loud grating noise comming from behind the drivers seat underneath.  I've had a look under and gave everything a wiggle.  No play from the handbrake end of the transfer box and no play at the axle. I replaced all the UJ's about 2 months ago. I did notice a bit of movement in the slide joint on the prop but could this make the loud vibration that i'm getting.  I've ordered a new prop to see if it makes any diffrence.  anyone have any other ideas??

cheers
Dave

Title: loud grating sound down from 70 to 60mph
Post by: extreme90 on July 09, 2007, 20:55:08

take one prop off and try it then do the same with the other prop

Title: loud grating sound down from 70 to 60mph
Post by: ken110 on July 09, 2007, 20:58:24

cheers, I thought about that bu then I dont really want to do 70 in diff lock. I know it'll only be driving one prop but you're supposed to avoid high speeds to keep the the little gears in on bit :?

Title: loud grating sound down from 70 to 60mph
Post by: extreme90 on July 09, 2007, 21:00:37

:shock:  really  :shock:
i was doing 80 one time on way home in difflock  :oops:

it is fun tho rear wheel drive with a 200 pushing out 150 +  :twisted:

Title: loud grating sound down from 70 to 60mph
Post by: ScrapyJape on July 10, 2007, 12:58:22

When was the last time you changed the oil in the diffs and Transfer box?

power slide in a defender that sounds a laugh... o what psi are you running on your 200?

Title: loud grating sound down from 70 to 60mph
Post by: ken110 on July 10, 2007, 14:33:01

the rear was topped up the other week. the gear oils/fluid in the boxes was changed last year. I'll check the levels but i havent got any leaks

Title: loud grating sound down from 70 to 60mph
Post by: muck_truck on July 10, 2007, 14:38:47

You'll be alright doing 70 with one prop and diff lock for testing on a short run.  The same load will be going through transfer box, just extra load on the prop and axle thats still attached.

Dont be too harsh on acceleration and it will be ok.  i did this last weekend and when i first got it and its still going fine.  

I live near a dual carriage  way thats about a mile to the next roundabout so i go up and down there a few times.

Title: loud grating sound down from 70 to 60mph
Post by: extreme90 on July 10, 2007, 22:11:09

running 1.2bar atm so what ever psi that is i dunno john  :?

Title: loud grating sound down from 70 to 60mph
Post by: Range Rover Blues on July 15, 2007, 02:14:10

Depends which prop you have removed, as difflock couples one output to the input, so if you drive the output that has the difflock, ie the front then the centre diff itself is relived of duty, if you only use the rear then the loading on the planet gears is double the normal load.

That said they are strong enough to get knocked about in low box, so just try to avoid towing.

Title: loud grating sound down from 70 to 60mph
Post by: ken110 on July 26, 2007, 13:23:03

it was the rear prop, new one fixed it.  when i did the Uj's and grease I think I put the two parts back out of phase, making it unballanced. Not helped by the wear on the slide joint. all done and happy again, cheers Guys