Crunch, Grind, Stop!! Any thoughts?

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C.J.Mylchreest

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Morning All,

So, just on the way to deliver the 90 to a garage to fit new clutch slave and master and a new PS Box, and suddently a grind and no drive. Just grinding when in gear, and goes nowhere.

I am suspecting some kind of connection between gearbox and transfer box (if there is such a thing), or (hopefuly not) the TB itself.

Will be going in this week, so we'll find out, but any thoughts on initial diagnosis from you experts?

Cheers,
Charlie.
 
Col means what happens if you put it in diff lock, [90's are permanent 4wd]
If you are lucky then it may be a half shaft problem.
However you say you suspect something in the box's. This may well be failure of gearbox mainshaft to transferbox input gear splines. To fix you will need recon/replacement gearbox and transfer input gear. The only good news is gearbox was coming out anyway.
 
Last edited:
Easy enough item to check, remove the round plate on the back of transfer box and you will see the end of the shaft/gear. Engage drive carefully and if shaft spins inside the still gear there's yer problem. Sorry to say it is not unknown for some types:(:mad: to put some blobs of weld to get around the problem for a bit.
It takes a lot of miles for the shaft/gear to wear out so should not be an issue with a recent recon.
 
Can you still get it into gear smoothly, If you were changing the clutch because it was on its way out it may have given up the ghost altogether, clutch cover may have fell apart.
 
Yes it still goes into gear. When you come to take off there is a crunch and it pops out of gear.

Everyone seems ot think gearbox, which really sucks.
 
A recon gear box from Ashcroft isn’t that expensive and it’s not a big or long job to swap them over. If it is a mainshaft failure make sure the put a cross drilled input gear in other wise it will just happen again.
 
C.J.Mylchreest said:
Thanks everyone. Cheapest I have found is Ashcroft at £445. Or £400 a chap on ebay.
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I would go with ashcroft for the extra £45. Unlike most their warranty is actually worth having. I have just sent my recon gearbox back to them as it stripped the teeth of 5th. Phoned them Monday, collected Tuesday, returned to me fully fixed on the Friday. Cannot fault their service.
 
payydg said:
A recon gear box from Ashcroft isn’t that expensive and it’s not a big or long job to swap them over. If it is a mainshaft failure make sure the put a cross drilled input gear in other wise it will just happen again.
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Does anywhere make gear boxes from scratch? Reconditioned always seems a bit middle of the road, but if it's got a warranty it's probably the real deal.
 
payydg said:
How do you mean? They rebuild them from scratch replacing what needs replacing as they go.
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I figured that sure.

But is there anyone not casting and making the transmissions from scratch instead of relying on existing ones that were made years ago to recondition?
 
BuzzLand said:
I figured that sure.

But is there anyone not casting and making the transmissions from scratch instead of relying on existing ones that were made years ago to recondition?
Click to expand...

There isn't only recon boxes. Even when they were making them a new one cost many thousands.
 
If it's actually jumping out of gear - I mean the gear lever moves back to neutral - it's more likely the gearlever/selector bit is out of adjustment, or even just loose.
 
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