Knocking under the my LR3 when decelerating then accelerating

[Andy T]

I've been experiencing a loud knock under my LR3 after I slow down then accelerate. It only happens at slow/low speeds. Had a look underneath but cant see anything loose. My mechanic has checked and he is also puzzled.
Don't think its a gear issue as it happened in manual mode without changing gears but I'm not a mechanic. Seems to be getting slowly worse so want to find out how to fix it soon.
Any advice out there?

[hpal]

My D3 2007 does something similar, it's gor 240,000km now and has done it ever since I bought it at 200,000km. I put it down to driveline or gearbox wear. It hasn't caused me any worry, I kind of drive around it but feathering the throttle on when needed.

[Pippin]

My D3 2007 does something similar, it's gor 240,000km now and has done it ever since I bought it at 200,000km. I put it down to driveline or gearbox wear. It hasn't caused me any worry, I kind of drive around it but feathering the throttle on when needed.This is very common and can be reduced by fitting an EVC throttle controller.

[hpal]

This is very common and can be reduced by fitting an EVC throttle controller.
When fitted, do you dial it up to be more resposive or dumb it doen a bit? Which one reduced the clunking? Would a remap help instead?

[Pippin]

When fitted, do you dial it up to be more resposive or dumb it doen a bit? Which one reduced the clunking? Would a remap help instead? I run the EVC at 2 which is more responsive and also takes the lag out. Maybe a remap, perhaps someone can answer that.

[veebs]

My indie suggested it was wear/slack on the chain in the transfer case. He assures me it won't break, though it is becoming quite noticable and annoying now.

Hadn't heard the throttle controller trick, though if it really is a worn driveline it's hard to imagine it improving that much?

[DiscoJeffster]

I have horrid on off throttle clunk through my drivetrain. I’ve yet to take it in to have it diagnosed. I can drive around it somewhat with very gentle throttle application

[Pippin]

I have horrid on off throttle clunk through my drivetrain. I’ve yet to take it in to have it diagnosed. I can drive around it somewhat with very gentle throttle applicationThe throttle controller helps you drive around it nothing more.

[DiscoJeffster]

The throttle controller helps you drive around it nothing more.

Yeah I have a throttle controller. Doesn’t help with this. This clunk is well over the typical disco clunk. Something is worn out but I guess 300k km will do that [emoji4]

[Fatso]

Worn lower front wishbones maybe !

[PerthDisco]

I have horrid on off throttle clunk through my drivetrain. I’ve yet to take it in to have it diagnosed. I can drive around it somewhat with very gentle throttle application

Other than getting it in and out rebuilding the TC is no big deal bearings and chain. All parts available.

[DiscoJeffster]

Other than getting it in and out rebuilding the TC is no big deal bearings and chain. All parts available.

But is that the problem??? Who knows I guess without diagnosing it which really means a hoist. It’s not a big enough issue for me to look into it further. One day I’ll get around to getting the Indy to take a look.

[veebs]

But is that the problem??? Who knows I guess without diagnosing it which really means a hoist. It’s not a big enough issue for me to look into it further. One day I’ll get around to getting the Indy to take a look.

My concern is any damage the thud could be doing downstream - assuming its the transfer case, am I now placing undue stress on diffs, drive shafts and their universal joints, etc etc?

[josh.huber]

Im pretty sure mine is in the gearbox, been there ages. It's not in the transfer case. I dropped it and felt it and lined the rear shaft.

My rear diff also has allot of back lash in it.

Adds character

[veebs]

Out of interest, as anyone changed the rear drive shaft, with any improvement to this clunk?

[josh.huber]

Out of interest, as anyone changed the rear drive shaft, with any improvement to this clunk?

Yep, nup!

I changed the rear shaft, no improvement.. Not saying they are all the same though.

[350RRC]

So these things have slop in the gearbox, diffs and a chain that stretches in the TC on top of all the other joys? Wow. [biggrin]

DL

[josh.huber]

So these things have slop in the gearbox, diffs and a chain that stretches in the TC on top of all the other joys? Wow. [biggrin]

DL

Well... Mine is 280k. The noise started in the 170k zone, hasn't got worse. The TC chain stretch to me if a myth, not enough problems to be real, I've spoken to a supplier who regrets keeping stock of the parts, can't sell em!

How much slop is to much? Mine can be corrected with attitude.. So it's probably not a big deal.

It's all character building

[350RRC]

.......................

It's all character building

I've noticed that. Cheers, DL