Play in transmission

Land Rover Discovery 1, 2 and 3

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Kaspaas
Posts: 16
Joined: 30 Jul 2008 10:06

Play in transmission

Postby Kaspaas » 04 Jan 2011 11:33

I hope any of you can help mme with my issue .

I have play on my transmission from what i suspect.
Symptoms: There is a clanking noise coming from the transmission when I coast. But I only here the noise when I step on the throttle while cruising.
So I drive and step on the throttle I here a clank noise and when I leave the throttle I here a clanking noise again. Sometimes it is worst than other times.
I had it with a indepentant workshop and they told me that it usually is a small bearing in the transfer box that is the culprit. I had it there they replaced some seals and told me the bearing was fine and the car is fixed after they did the seals.
Surprise, the same still happens.
I have checked the rear roto flex and it seems fine. All the drive shafts also seems fine.
I must say that this has been going on for the last 40 000 km's.
I know some would say that I shouldnt bother, but I do.
Can there not be play in the rear diff? I know they say that the diffs are strong but that is the only other area where the problem could be.
Can it be the clutch perhaps?

It sound like a common problem to the Disco's with higher mileage and usually it is a bearing in the transfer case. However mine was checked and repaired but I still hear the clanking noises.

It is a automatic and the gearbox was overhauled not to long ago. It was like that even before the gearbox overhaul.

Does anyone perhaps know a transmission specialist in the Cape area.

It is driving me nuts and very frustrating as I do not know what the problem is.

Thanks

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naks
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Location: Stellenbosch, Republic of the Western Cape
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Re: Play in transmission

Postby naks » 04 Jan 2011 11:50

Symptoms: There is a clanking noise coming from the transmission when I coast. But I only here the noise when I step on the throttle while cruising.
Sounds like excessive play from the rear drive member?

Not sure what indie you use, but I would recommend you take to Marius Rondhart (http://landyonline.co.za/landyforum/mem ... file&u=243)
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naks
Posts: 1688
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Location: Stellenbosch, Republic of the Western Cape
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Re: Play in transmission

Postby naks » 04 Jan 2011 16:09

Marius is the mechanic from Safari Offroad Centre, seems like he doesn't hang out here anymore. http://www.safarioffroadcentre.co.za/
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gcef
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Joined: 04 Jan 2011 16:47

Re: Play in transmission

Postby gcef » 04 Jan 2011 16:53

I have the identical problem and it also drives me nuts. So far have had both prop-shafts replaced, diff oils replaced and one r/h front hub. The clunk continues. Do you have a transmission vibration at around 120-125kph? I subscribe to LRO magazine and see that there are suppliers offering replacement diff kits and am considering this but only as a last resort. If you need this information, reply. In the mean time I am now replacing my transfer case as a precaution. Any other ideas out there?

Joseph
Posts: 120
Joined: 05 Dec 2008 07:38
Location: Centurion

Re: Play in transmission

Postby Joseph » 05 Jan 2011 08:18

After spending some time taking my transfer case apart I can add my 5 cents.

The transfer input shaft has to be torqued to a specific pre-load using shims. If it is t0o loose you will experience the very common LR transfer box clunking, if it is too tight you get the very common LR transfer box whine. This can be done without removing the box from the car.

It is also possible to set the pre-load on the transfer box main drive shaft as well as on the intermediary gears, this will need complete removal and dissasembly.

IMHO this is a bit of a trial and error for most workshops.
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jakeslouw
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Joined: 25 Jul 2008 10:53

Re: Play in transmission

Postby jakeslouw » 05 Jan 2011 08:31

From what I've seen and heard, it's beyond most so-called "specialist gearbox rebuild workshops", with some "rebuilt" gearboxes coming back worse than when dropped off.

And let's not start discussing diff repairs.

There are a bunch of guys in Centurion that seem to be good: Centurion Gearbox and Diff Centre seems to get consistently good reviews.

Naks will have seen that they have been discussed on ZALRO.
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Kaspaas
Posts: 16
Joined: 30 Jul 2008 10:06

Re: Play in transmission

Postby Kaspaas » 05 Jan 2011 10:03

Hi fellow frustraturers!

Marius actually did the recon of my gearbox. At first I thought it was a issue with that. I took it back to him and he confirmed that it was not the gearbox. He also could not pin point the where it was coming from.

The car just came back from a service centre in Wellington. Still the same problem.
Thats why I need somebody that specialize in transmissions.
I believe even with the independant guys that some of them are better then other ones in certain areas.
Marius is very good with electrical stuff and detailed stuff, where the guys in Wellington is very good on mechanical stuff and they get the job done quickly.
I dont say one is better or worse than the other, they are all good in certain areas.Marius is just very far for me.
I have also heard good stories about centurion diff centre.

I cannot afford a workshop to open the transfer case charge me 7hrs x R300 + vat and then the problem still persists afterwards.

Joseph, I like your 5cents
Can you add another 5 cents worth
How would one torque the input shaft without taking the transfer case apart.
Can one do it with some basic tools and ten fingers.

I am almost sure the sound is coming from the transfer case.
It does not sound from the diffs.
Gcef, be carefull not to throw to much money at it. Who is your advisors /workshop?

Thanks guys

Joseph
Posts: 120
Joined: 05 Dec 2008 07:38
Location: Centurion

Re: Play in transmission

Postby Joseph » 05 Jan 2011 12:01

If the input gear has too much play you can remove the input gear cover (it's the round cover at the top/back of the transfer case to the left of the handbrake drum) and change the shim a size or two up. It's fastened with 6 small bolts and should only be a half an hour job to remove them. They are locktite so you will need a 13 mm socket to get them off, also you will need to pry/hammer a bit to get the bearing housing plate. You would have to first remove and measure the existing shim before you will know what size to get from you friendly stealer.

Whilst you are taking the cover off remove the input gear and check the condition of the input gear and gearbox shaft.

Unfortunately you won't be able to measure the pre-load whilst it is connected to the gearbox so you would have to be prepared for some trial and error.

The gears and bearings inside the transfer box are really impressive heavy duty stuff, the intermediary gear weighs more than 6 kg's. The weakest point of the box is the differential assembly and the high/low locking arm.

I can send you the relevant page in the RAVE manual if you decide its worth a shot.
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Kaspaas
Posts: 16
Joined: 30 Jul 2008 10:06

Re: Play in transmission

Postby Kaspaas » 05 Jan 2011 15:58

Thanks Joseph

I have scanned through my Rave manual. I looked through the transfer box pages. Can you tell me what page they actually show this.
Is it the selective shim we are talking about. So i would just replace it with a thicker one or add another small one.
Can this parts be so expensive.

Sound very easy when you explain.

Thanks

hgb-560sel
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Location: Pretoria, South Africa

Re: Play in transmission

Postby hgb-560sel » 06 Jan 2011 07:42

Hi Kaspaas

I had the same problem on my Disco1. As I have quite a lot of experience with 4X4's after checking the basic and obvious stuff, I honed in on the the half shafts holding the spider gear assembly. Where they mate there is the development of quite a lot of play over time.

I solved the problem by fitting a Kamdiff spider (available from LandyOnline - Brian). Check in my thread "my nearly unstoppable Disco1".

It shows some pics of what I have done. If you are running any type of locker, then the Kamdiff spyder is a must! ;)
with kind regards
George

2003 RR Vogue Td6
2005 LR Disco3 TDV6 S
1955 MB 300SL W198/I
1988 MB 500SL R107
1991 MB 500SL R129
2001 MB SLK 32 AMG
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