Freelander IRD

[woko]

Would anyone have a old IRD unit that the case is not damaged on?
I will rebuild it. I need it out of a K1.8 or diesel (L or TD4) I think my brothers has done his and it has lost all the oil so guessing the case has cracked. Have to pick it up tomorrow.

[woko]

Yep has hole in it. Pinion bearing has failed and pinion gear has warn a hole in it. Im willing to pay for any IRD that case is ok.

[woko]

I have got hold of one. Will let you know how the rebuild goes.
Still after a spare if anyone's got a old one for sale.

[woko]

All bearings have been ordered and should be here by Wednesday.
Removed cooler with out damaging but crown wheel had been rubbing on it so have to replace.
Crown wheel and pinion have been damaged and the current manufacturer has gone broke, so these parts are scarce at the moment until another manufacturer starts making them. I did find a supplier but it has doubled the price of crown wheel and pinion.
I'm going to convert to be a 2wd in the mean time. The only off bitumen this freelander sees is about 500m of a gravel road once a month if lucky.

[woko]

Have it all back together. just need to fit. I did have some troubles finding 2 of the input shaft seals as they have a 43mm id, but I did find them. The only seals shown on LR micro cat are the RH output and pinion seal, the 4 that seal input shaft are not sold through LR.
Very easy job to do. There are 2 bearings that can be difficult to remove. 1 is on the crown wheel and the other is on the diff assembly. required welding the bearing to remove.
Looking on LR micro cat looks like the only shims available are for the pinion so to shim crown wheel and diff you may have to make shims.

[Ace]

is it the Viscous Coupling that causes this to fail?

Will these touble some VC's have been done under warranty on these vehicles by now?

I know in 2000 models onwards they were rectified

[101RRS]

In the pre 2000 FL1s the difference between the front diff ratio and the rear diff ratio was too great causing the VCU to be loaded up. When it failed after about 120,000km it locked causing transmission windup which resulted in bearing failure in the rear PTO of the IRD which allowed the rear crown and pinion of the rear PTO to unmeash (IRD failure).

At the start the IRD could not be repaired and was replaced and the new item had a different diff ratio so the VCU was not loaded up and did not fail so early. Later, parts became available to repair the IRD so on these the old diff ratio might exist - also if a second hand unit was installed an early one could have been fitted.

I would expect that by now most would have the later IRD fitted but there is no guarantee.

Garry

[Ace]

In the pre 2000 FL1s the difference between the front diff ratio and the rear diff ratio was too great causing the VCU to be loaded up. When it failed after about 120,000km it locked causing transmission windup which resulted in bearing failure in the rear PTO of the IRD which allowed the rear crown and pinion of the rear PTO to unmeash (IRD failure).

At the start the IRD could not be repaired and was replaced and the new item had a different diff ratio so the VCU was not loaded up and did not fail so early. Later, parts became available to repair the IRD so on these the old diff ratio might exist - also if a second hand unit was installed an early one could have been fitted.

I would expect that by now most would have the later IRD fitted but there is no guarantee.

Garry

thanks Garry, makes sense to me now. Matt

[woko]

This failure was on a 2001 TD4 with 200K. The VC had not seized but was difficult to turn. The pinion bearings had collapsed.
After some research I have found out the viscous coupling should be replace between 120K and 150K. And this should be for all manufacturers as I have found it is also common on Jeeps, Hyundai's and Subaru's. Why this happens is the coupling is oil filled and the oil brakes down with age. If you could change the oil it would be fine, but it is a sealed unit, I'm going to add a drain and fill plug to the one that came off and change oil but I'm having difficulty finding oil. I can find a supplier in US but not AUS
You can tell the difference of which IRD you have as the casings are slightly different.
You used to be able to get different ratio crown wheel and pinions so the front and rear ratios difference are lower but the company making them have gone broke and they are difficult to get.

[Ace]

This failure was on a 2001 TD4 with 200K. The VC had not seized but was difficult to turn. The pinion bearings had collapsed.
After some research I have found out the viscous coupling should be replace between 120K and 150K. And this should be for all manufacturers as I have found it is also common on Jeeps, Hyundai's and Subaru's. Why this happens is the coupling is oil filled and the oil brakes down with age. If you could change the oil it would be fine, but it is a sealed unit, I'm going to add a drain and fill plug to the one that came off and change oil but I'm having difficulty finding oil. I can find a supplier in US but not AUS
You can tell the difference of which IRD you have as the casings are slightly different.
You used to be able to get different ratio crown wheel and pinions so the front and rear ratios difference are lower but the company making them have gone broke and they are difficult to get.

whats the replacement VC unit worth?