Member Since: 24 Dec 2016
Location: East Yorks
Posts: 3
Front Diff on its way out?
Hi
Could anyone confirm my thinking please? I think my front diff is on its way out . I have a vibration while cruising, if I lift off or power on the acceleration the vibration changes or goes away for a while.
When I've driven forwards, stop and then reverse there's a single loud click / clunk. If I reverse slowly it doesn't clunk until I add more power to get up a slope.
Underneath the front propshaft is tight on the joints but can be rocked back and forth by hand. If I then grab the front passenger driveshaft I can wobble it around. Again not the joints but the input to the diff. Then after a bit of jiggling it tightens up after this there's no rock in the front prop anymore.
I'm pretty certain its goosed but I'd like someone to confirm my thinking before I shell out on a new diff.
8th May 2024 8:16 pm
James3LDR
Member Since: 28 Jun 2016
Location: Bath
Posts: 32
Similar symptoms here Daz, did you replace the Diff and did it solve your issue?MY12 D4 HSE
12th Aug 2024 2:45 pm
rrhool
Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4537
My 2007 D3 front diff went. I got a replacement from a breakers, and it's been good as gold since then.
Pull the drain plug out and see if you've got swarf.
D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.
Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone
12th Aug 2024 2:53 pm
zig
Member Since: 09 Sep 2005
Location: Scotland
Posts: 650
I had a similar problem with my front diff, noise/vibration at speed which lessened when you lifted your foot off the accelerator. Had a reconditioned front diff fitted which got rid of the noise.
There is Technical Service Bulletin TSB LTB00245 covering the fitment of a modified breather cap for the front differential LR019450 which should be implemented if it has not already been done see https://www.disco3.co.uk/gallery/albums/us...b00245.pdf
14th Aug 2024 7:16 am
Daz.
Member Since: 24 Dec 2016
Location: East Yorks
Posts: 3
I had a new diff fitted. That cured the clunk on changing direction. When the garage dropped the oil it wasn't too bad.
However the vibrations are still there. I think it could the torque converter. It's similar to having a manual in too higher gear. If I drive in sport mode or use command shift I can reduce the vibrations significantly. I also can reproduce the issue buy changing up in to a higher gear manually.
Mine's done 182000 now and had a torque converter a few years ago. I think I'm at the point of throwing in the towel. Recently it's had two EGR values, full set of pirelli tyres, turbo intake pipe, rear brakes, track rod, refurbished rear hub (new bearing, brake backing plate, upper and lower bushes etc), and now a front diff.
14th Aug 2024 3:12 pm
Bardley
Member Since: 02 May 2018
Location: Hertfordshire
Posts: 478
What else on the drivetrain did you check before replacing the diff?
How's the rear Prop? Centre bearing? UJ's? Known history?
Did the garage diagnose the diff. Or was it a swap on spec only?
Your description sounds like TC as you say..from the text..revs related/ road speed related..2011 MY D4 HSE
Previously 2001 D2 TD5, 1996 D1 300Tdi, 1985 90 2.2 petrol.
Bikes! KTM, BMW, British, Classics and others.
14th Aug 2024 6:15 pm
Daz.
Member Since: 24 Dec 2016
Location: East Yorks
Posts: 3
I had a good look over everything myself but also with the guys from the garage when it was on the ramp. They very good at working alongside myself when it comes to maintenance.
The rear prop was changed as the center bearing had dropped.
The front diff was pretty much the only thing left to do but both the garage and I were of the same opinion so I was happy to change it.
Yes I think the TC is responsible for the remaining problems I have.
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. I have a vibration while cruising, if I lift off or power on the acceleration the vibration changes or goes away for a while.
