Freelander 1 Ird Bearings

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Tiny1000

Tiny1000

Active Member
Posts
242
Location
Reading, Berkshire
I had a bearing whine from the front of the TD4 which I had hoped it to be the bearings on the prop, but after changing them it's still there. With the prop removed there was no whine, so I expect it to be the IRD. Do I need to change all the bearings or could I get away with just changing the one's which connect to the prop? Also can anyone recommend which set to use - Cheers
 
If its the IRD bearings causing the whine, its a lot easier to just remove (for bearing change) the pinion than the whole IRD. You would think its going to be the bearing in the pinion that's most likely to be noisy. You can also check the condition of the crown/pinion gears with the pinion removed.

It does mean additional agro if you do then have to take the whole unit out though.

I changed the bearings in my IRD 2 1/2 years ago and they've been fine since. I used a kit from these people. It was mainly Timken bearings - but there were a few that just came in plastic bags - so I don't know what make they were.

http://www.onestopgearboxshop.com/
 
There's no need to fit a blanking plate, just remove the props. Have you checked the VCU for stiffness? This is the most likely reason for the whine, particularly on a trailing throttle.
 
GrumpyGel said:
If its the IRD bearings causing the whine, its a lot easier to just remove (for bearing change) the pinion than the whole IRD. You would think its going to be the bearing in the pinion that's most likely to be noisy. You can also check the condition of the crown/pinion gears with the pinion removed.

It does mean additional agro if you do then have to take the whole unit out though.

I changed the bearings in my IRD 2 1/2 years ago and they've been fine since. I used a kit from these people. It was mainly Timken bearings - but there were a few that just came in plastic bags - so I don't know what make they were.

http://www.onestopgearboxshop.com/
Click to expand...

Hi GG
I have found that the crown wheel support bearing - specifically the inner one - can be a main culprit. (providing no play in the pinion shaft / bearings )
If no play or 'roughness' in the pinion assembly, I would not advise changing the bearings due to the compressible spacer.
It would appear that the two main culprits in IRD issues are the inner support bearing (as above) of the crown-wheel assembly - and also the right hand drive shaft outer support bearing / seal/
These are the ones that tend to cause implosion / explosion / bang / clatter / oh bugger this is going to be expensive :).

Excellent link as well !.. not sure if they provide ALL the internal oils seals / O rings though ???? - how did you go on with those ?
Also, removing the INTERNAL race(s) ? did you use a cutting disk ? -(that seems to be a fairly normal way /////////)

Regards
Joe
 
I defer to your knowledge - you've obviously got more experience than I have!

I removed the IRD and split it. I had changed wheel bearings before but once I'd opened the IRD I questioned my ability to removed and refit all those bearings (particularly as the tools I had to hand were a hammer and screwdriver). So I gave the unit and kit to a guy here in Chch that rebuilds/modifies diffs and he did it. He did say that there were a couple of seals that he sourced that were not in the kit.

I then refitted it, filled it with oil and tentatively (very very tentatively) took it for a drive.

All the kits I saw though looked as though they came with the same seals - so presumably its common that they may need some extra bits. All the kits also looked to have the option of either 7 or 8 bearings. The 8th bearing being an 'expensive' one that's difficult to change and doesn't usually need replacing - I don't know how true that is, I got an 8 bearing kit just to be sure.

Your description of an IRD letting to is spot on :) It was more impressive to the hearing senses that the sight of an F1 car's engine letting go at 200mph on the main straight. Its very very noisy and disturbing. The AA guy wanted to tow me the couple of hundred yards home and when I said that that was not an option he looked at me as if I was on drugs or something. But when he pushed the car, and every yard was met with the sound akin to someone whacking it with a sledgehammer, he called the lifting truck!
 
Hi Tiny,
Just a note, it is often extremely difficult to identify WHERE the noise is coming from. In your case, it could be the IRD, the VCU bearings, and even possibly the REAR diff. The rear diff is usually heard from the rear of the vehicle ( but CAN be difficult to identify and confused for location - this is unlikely - but, noise of this sort can be difficult to pinpoint!)
Changing the vcu is one thing (and definitely worthwhile if age is unknown as condition is very difficult to identify and also a fairly controversial subject - I personally belive that if in doubt - replace it - that is VCU)
I presume you are awaiting a vcu AND vcu support bearings ?
is the 'whine' constant at all speeds - does it increase with speed ? does it get worse or better when accelerating ? - does it improve or increase on the over-run ?
Is the whine a load noise, a fairly quiet noise etc
 
It's quite loud but it's only there when engine braking, I've removed my VCU which had new bearings. I'm going to recon it within the next week or two so I'll let you all know how it all goes
 
Did you do the one wheel up test before removing the VCU? I also have a slight whine on overrun. My VCU times at about 45 seconds with 5Kg at 1.2 Meters.
 
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