300tdi transfer/gearbox

[Geoff_Potts]

Hi - advice please?

My 300tdi bought from new has on 2 occasions now collapsed the rear diff, so this week, I've been getting clunking noises and then it feels as though it is dragging, ie little jerks when driving, more noticeable in reverse as though something is jamming up.

Immediately I suspected rear diff again, so went underneath today and everything is fine. No play on input to diffs, propshats etc, however if I lift wheels off the ground and turn them there is a clunk coming from the transfer/gearbox area. More noticeable if I turn front and rear propshafts against each other, there is a lot of backlash and a large clunk apparently from transfer box.

Any ideas please?

thanks,

geoff

[bananahead]

thought that was normal

[Geoff_Potts]

Ha ha, yeah - it's a Landrover.

This time it feels serious with major 'snagging' mainly when revesrsing.

feels as though gears jam and then free off with a deep sounding clunk?

Thanks,

Geoff

[Mydisco03]

HI, i'm new here and i have a problem with my transmission i hear a noise when i drive fw around 15mph a ticking noise coming from the transmission or transfer case this is a 2003 discovery with no looking transfer case. any ideas??? i been off roading in deep water ,i check for water inside the tranny but i don't know how to tell if is water there ,everthing looks normal to me........:eek: i don't know what to do:banghead2

[Mydisco03]

ooops sorry for the mistakes i made when i write, it was locking transfer case and transmmission

[StrangeRover]

Geoff,
Could it be that your centre diff-lock is sticking and the busted rear differentials are a result of transmission wind-up?
Best bet would be to pick-up a known good transfer box (always some on eblag or on here) and do a swap-over. If you are doing it yourself.................
Look for a transfer box of a similar age as gearbox output shafts are not all the same http://forum.landrovernet.com/showthread.php?t=122347
You can leave the controls in-place (assuming they are free-moving).
You will need to remove nuts and detatch the LHS gearbox mount in order to tip the whole engine and transmission on to the crossmember.
Keep us posted!

[Mydisco03]

[quote=StrangeRover;1074946]Geoff,
Could it be that your centre diff-lock is sticking and the busted rear differentials are a result of transmission wind-up?
Best bet would be to pick-up a known good transfer box (always some on eblag or on here) and do a swap-over. If you are doing it yourself.................
Look for a transfer box of a similar age as gearbox output shafts are not all the same http://forum.landrovernet.com/showthread.php?t=122347
You can leave the controls in-place (assuming they are free-moving).
You will need to remove nuts and detatch the LHS gearbox mount in order to tip the whole engine and transmission on to the crossmember.
Keep us posted![/quote Oh ok i was thinking that the transfer case went bad, i know that sound come from under the truck around the transmission, now i have another question :D i wanna get the transfer case from a 2004 discovery v8 wich it has the center locking differential bcz the one i got now is just the 2 speed transfer case and the question is if the 2 discos share the same transmission? the swap it's possible?????? and thanks for the quick answesr

[Mydisco03]

Ok, thanxs for the quick answser but now i have another question:D the new transfer case i want its the one that have the center lockin differential bcz the one i got now its the 2 speed H-L wich it suck, jeje i want an up grade you know, if i do that can i just get the up grade and swap that baby up plus the get the inside part and then i'm good to go??? Off roading againg/??:cheers:

[StrangeRover]

This is goint to get confusing. Geoff started the thread and my response was directed to Geoff with a Disco 300.
See new thread for US Disco 2003.

[Geoff_Potts]

Hi Strangerover,

You could be very right there. There were a number of problems when I bought it as the dealer gave me a super deal as it was 2000 and they stopped making the 300tdi in 1998, therefore I have one of the few 300tdi's on a W plate. The result of this was I assume it's stood somewhere for a couple of years an dI had a few problems with headlight and indicator connectors being corroded.

The first rear diff went very early on although it does a lot of towing, and the one after that I assumed was because I did the rebuild on the diff and it wasn't perfect although all new bearings etc. I know there are critical settings for the diff, but we've rebuilt truck ones before and they work OK if you are close to settings.

Although if I jack just one wheel off the ground and try to drive, that wheel will spin, if the diff lock is sticking it woudl try to drive away wouldn't it?

Anyway, I do 100 miles a day commute and the disco just isn't practical with fuel prices as they are, it may be for sale now, tax and MOT ran out today, so I'll get the tax and test done and need to decide either to sell or to have a second car.

Thanks,

Geoff

P.S. if anybody's interested it's a W reg 300tDi, 7 seater, Epson Green, beige interior, alloys, plastic wraparound bull bar with spots.

[StrangeRover]

Although if I jack just one wheel off the ground and try to drive, that wheel will spin, if the diff lock is sticking it woudl try to drive away wouldn't it?

You're right it would send drive to the other axle and 'try to drive away'.

So, you have demonstrated that the centre differential works in its 'open' mode; which kicks my theory into touch. Unless the 'sticking' is intermittent: Does the dash-light work? There's always a few seconds of delay.
Personally I hate the LT230s they are so agricultural: That's why I swapped to BW.

So let's look elsewhere. At the risk of stating the obvious, can you be positive that there are no bits of old differential in your axle case?

I have a spare transfer box, a spare differential and an umbrella: I've never needed to use any of them!
If you need any help (seriously) drop me a PM.
Cheers, SR.

[Geoff_Potts]

My own theory on the diff is (probably totally wrong), as I mentioned it does a hell of a lot of towing and the rears was sagging quite soon after I bought it. I noticed however a few months ago that if you push the rear end right down with a heavy loadt the weight seemed to sit on the propshaft, ie it ran out of travel. it didn't go as low as bump stops. I changed my rear springs for heavy duty ones to lift the rear.

When the diff went it was always the propshaft end bearing so I assume it was getting shocked via the shaft on bumps. Is this possible?

Although I'm not a Landrover Engineer, I've been working as an engineer for 12 years now and I'm quite meticulous etc and even i dare say good at jobs like that. But no - I cannot totally rule out an old pice of diff or bearing.

I think to diagnose correctly it won't doi any harm to remove rear diff, clean, inspect, replace fill with fresh oil and check housing before going any further.,

I also have a suspect front swivel housing which I ned to fix to eliminate that. The 'jamming' for some reason only happens in reverse and then mainly when wheels turned so I'm thinking maybe a front swivel now?

Thanks for your help,

Geoff

[StrangeRover]

The sliding coupling on the prop (a splined joint with a rubber boot) may be jamming. When you have the propshaft off it's worth checking and greasing (if you split it, mark the position of the two halves).
The early 300 series have a 'rubber donut' coupling at the axle-end and these are prone to break-up, particularly if there's another problem in the propshaft. I guess LR learned something as they re-introduced proper UJ an later 300s. I've never had a problem with the donut set-up (nice and smooth).
The lock-up that you describe sounds like a dodgy CV joint (just like a FWD hatchback). If you're doing the swivels next anyway................

[V8_Disco]

My Disco 2 has a donut insted of UJs on the rear dif/propshaft position

A

[Geoff_Potts]

Hi got sick of Disco, and been using cycle overthe summer, much cheaper on diesel, although lager costs have risen considerably!.

OK, problem was front cv joint, when I got it stripped, swivel had lots of pitting in it, and cv was full of rusty water. Running lovely now.
Thanks for help and advice, greatly appreciated.

thank you

[StrangeRover]

Result!:D
Cycling in the snow's no fun.;)

[Geoff_Potts]

Nope, but driving a Disco in the snow is!

Also lost half a stone cycling, so got all winter to put it back on now!!

thanks