clunk on accel/decel...advice please

[TATTOODROB]

hello i am gettin a clunking noise from rear on accel and decel....have read bible which gives various reasons but just wondered if someone has had this before and can tell me what it was and how much to fix.my mileage is gettin upto 70000.is it diff?driveshaft?or?
also while im writing......after long journey in 5th i had real probs gettin in lower gears,any advice welcome.ta rob

[parrot of doom]

At what speeds?

I get a little bit of clunking when on the motorway at about 80, but only if I lurch my foot on and off the accelerator, and only slightly.

[GreenV8S]

Loose diff mounts, worn diff bushes, at that mileage it might be a worn diff or CVs. Best get under there with a pry bar and see what's up.

[19560]

GreenV8S said:

CVs.

UJs?

[GreenV8S]

19560 said:

UJs?

Possibly, but it seems fairly rare for the prop shaft UJs to go. The CVs seem to go a lot more frequently.

[spend]

But at a few quid each its easier to replace the UJs if you have the prop shaft out :-) (think I paid less than £6 for the pair on LT77 - GKN shaft from local bearing specialist).

Not completely sure I agree with you Pete about the durability of the PS UJ's. Whenever they are greased via the nipples - the grease ouses out one cap without getting fully to the other - which never seems perfect.

On the whole I'd agree more with mounts / bushes as a diagnosis tho & dont forget the engine mounts.

Dave

[pvdv]

What was the reason?

Cheers,

Paul

[Slacey]

My Griff is doing this at the moment, and having had it looked at the diff mountings and bushes are sound; it's the backlash in the diff itself (61k). It's going for a rebuild at Competition Transmissions soon.

[zippee]

Slacey said:

My Griff is doing this at the moment, and having had it looked at the diff mountings and bushes are sound; it's the backlash in the diff itself (61k). It's going for a rebuild at Competition Transmissions soon.

What sort of cost have you been quoted for a rebuild? My diff is making some fairly serious clonking (45'000 miles) and whilst I know I need to replace the diff bushes I want to try and cost up for the worst case scenario as well.

[pvdv]

See also the other thread here:
Diff making noise at quick acceleration/deacceleration

Cheers,

Paul