M

Marksdisco3

New Member
Hi all,

I have been looking at the disco 3 shudder posts and mine is a bit different.
Over 2000 revs doesn't do it.
Not noticiable under load or acceleration
If you cruise any speed, 1500 revs to 2000, get this weird shudder/vibration and revs bounce by about 300.
Doesn't seem engine related more under the car? Any ideas?
Would a knackered shaft put load on the engine and cause the rev bounce at cruise?
All ideas greatly welcome....
 
Welcome to LZ.

Could be many things, always worth saying hi in the introduce yourself section.
 
Check all propshafts, U/Js and play at the pinions on both diffs before going to the expense of the TC, although I expect there is a way of taking a plate off or summat to check out the TC from below.
Dunno exactly as I only have D1 and D2.
But did have a case where vibration was caused by a pinion nut coming loose. took me ages to find it.
 
Update.... major service including gearbox...added shudder fix.... seems better but not perfect....

Looks like a TC ... thank you to everyone who helped
 
Marksdisco3 said:
Hi all,

I have been looking at the disco 3 shudder posts and mine is a bit different.
Over 2000 revs doesn't do it.
Not noticiable under load or acceleration
If you cruise any speed, 1500 revs to 2000, get this weird shudder/vibration and revs bounce by about 300.
Doesn't seem engine related more under the car? Any ideas?
Would a knackered shaft put load on the engine and cause the rev bounce at cruise?
All ideas greatly welcome....
Click to expand...
Just had my mate who has Autel Diagnostic kit do some updates following new fuel filter change, still had low speed acceleration juddering, system shows that glow plug relays not working, discovery 3 has two 70 amp relays and if one fails it shuts the other zone down to protect system, one will still work for cold stating then shuts off, glow plugs also burn off excess fuel, so a simple check on those relays may solve a few problems, sounds daft but then logical if over fueling is the cause of juddering.
 
OK so feeling like I am too rich I gave my disco3 to the garage ... they put it on their brand new snap on diagnostic tool, both live for a drive and in the workshop, it's now done about 500 miles since its major service and shudder fix additive. If you don't look at the rev gauge it's not noticeable...but when cruising you can still see the rise and fall of the revs of about maybe 200 revs at most. Only happens if the revs are between 1500 and 2000. Professional opinion, could be a faulty rev needle as much as a faulty TC. So just going to use it...enjoy it and fix it when something actually breaks... won't be long.
 
Marksdisco3 said:
Hi all,

I have been looking at the disco 3 shudder posts and mine is a bit different.
Over 2000 revs doesn't do it.
Not noticiable under load or acceleration
If you cruise any speed, 1500 revs to 2000, get this weird shudder/vibration and revs bounce by about 300.
Doesn't seem engine related more under the car? Any ideas?
Would a knackered shaft put load on the engine and cause the rev bounce at cruise?
All ideas greatly welcome....
Click to expand...
Check the two 70 amp relays for the glow plugs, may sound silly but glow plugs also burn off excess fuel which can cause the juddering. If one relay is duff the ECM shuts the other one off for safety but still allows cold starting.
 
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