GrumpyGel
Well-Known Member
- Posts
- 26,744
- Location
- Christchurch, New Zealand
I would imagine your IRD is about '75%' shagged. Means its in a decent enough condition to drive the front wheels without any problem (although for how long is a question!) and will turn the rear pinion without a prop attached without jamming the crown & pinion gears (ie the gear that drive the rear pinion).
As it will turn the pinion without jamming - your friendly seller couldn't be arsed to swap out the pinion for a plate, and of course could tell you it was an economy decision to remove props
However the bearings in the IRD will be so worm, and teeth on the crown and pinion gears possibly broken, so when you attach the props and start putting forces through it (the front & rear wheels turn at different speeds when turning) - it won't take it. It will have been made like this by a a faulty (overly stiff) VCU, mismatched tyres or unevenly inflated tyres.
You're almost definitely looking at a recon VCU and a recon IRD - kerrrr-ching. You might be lucky and be able to get something from a breakers that is servicable. You might also be unlucky and need a rear diff.
When my IRD went I, I recon it was about '85%' shagged. I took the props off, took it for a test drive and this is what it sounded like....
Mine made that knocking sound. I could have replaced the pinion for a blanking plate, but I didn't trust the remaining front axle drive, so had all the bearings in the IRD replaced (and shims & seals). I also removed the pinion gear to make it 2WD as I didn't want the expense of crown and pinion gears and a VCU shipped from the UK (I still run the pinion, props and siezed VCU). You're luckier - you have cheap parts local.
As it will turn the pinion without jamming - your friendly seller couldn't be arsed to swap out the pinion for a plate, and of course could tell you it was an economy decision to remove props
However the bearings in the IRD will be so worm, and teeth on the crown and pinion gears possibly broken, so when you attach the props and start putting forces through it (the front & rear wheels turn at different speeds when turning) - it won't take it. It will have been made like this by a a faulty (overly stiff) VCU, mismatched tyres or unevenly inflated tyres.
You're almost definitely looking at a recon VCU and a recon IRD - kerrrr-ching. You might be lucky and be able to get something from a breakers that is servicable. You might also be unlucky and need a rear diff.
When my IRD went I, I recon it was about '85%' shagged. I took the props off, took it for a test drive and this is what it sounded like....
Mine made that knocking sound. I could have replaced the pinion for a blanking plate, but I didn't trust the remaining front axle drive, so had all the bearings in the IRD replaced (and shims & seals). I also removed the pinion gear to make it 2WD as I didn't want the expense of crown and pinion gears and a VCU shipped from the UK (I still run the pinion, props and siezed VCU). You're luckier - you have cheap parts local.