Corse I CV joints

**hollytree** · 27-05-2018, 12:09

Right
Inner and outer CVs on both left and right drive shafts check, and left(the short side) both replaced.
Both calipers off, checked, copperslipped etc and refitted.
Dampers lowered so less misalignment on CVs.
Go 100yds and still bang! (feels like large heavy hammer thump on car) and feeling that something is sticking/dragging.
Stop the car, jump out and it pushes/rolls in both directions no trouble.
Turn round and drive home, and all OK.
WTF is going on?

Jacked the rear of the car up, both wheels off ground and put car in gear.
Turning one wheel, there is probably 5mm of rim rotation before a clunk and the other wheel starts to turn in the other direction.

Could I have an intermittent differential problem?
Can i take the cover off with engine in situ and inspect it?
Anyone have any instructions on how to get it out, and if I do should I put LSD in.
The box and diff was new (supposedly) when I bought all the bits.

Steve

**strat24v** · 27-05-2018, 17:03

That does sound like diff problems or a shaft bearing problem.

**hollytree** · 27-05-2018, 19:26

I guess wheel bearings in the uprights next before I start on the diff or the clutch.
It is just so weird. As soon as i stop the car rolls freely. I drive home, jack it up and there are no funny noises, no signs of rubbing. Nothing!
Steve

**Strat Fan** · 27-05-2018, 19:42

Originally Posted by hollytree

I guess wheel bearings in the uprights next before I start on the diff or the clutch.
It is just so weird. As soon as i stop the car rolls freely. I drive home, jack it up and there are no funny noises, no signs of rubbing. Nothing!
Steve

If you've already jacked it up and turned the wheels then you would have felt something on the wheel bearings.
It could well be a faulty diff and the standard ones can fail (I have one that has let go on a 3.2 GT) see - http://www.autolusso.co.uk/gearbox-rebuilds.html In this case the car went with a bang and lost drive, I then managed to engage a gear and limped it home before it would not drive anymore. In my case it is terminal but if it is your diff failing then you may be able to save your gearbox by checking now. As they say swapping to the Quaife helps prevent this failure.
You should be able to drop the diff without removing the box from the car, it is possible in the other replicas so you could be lucky.
The fact that one wheel goes the opposite way when you turn the other suggests that at least some of the parts are where they are supposed to be. You would still be able to push the car back and forth irrespectively, it is just when you try to drive the car that the problem would arise.
Happy hunting

**Normb666** · 27-05-2018, 21:16

That reminds me of a box failure I had in a Fulvia - big bang, stop, roll car, all OK, drive a bit, still OK, then big bang again. Turned out one of the gears shed some teeth and all was fine as long as the bits were at the bottom of the box, but they kept getting picked up and...well, you can guess the rest...

As Craig says, get that diff out pronto before any loose bits take the rest of the box out!! Don't know if you can have a good look round in the casing with the diff off to check for debris?

Good luck and let us know...

**hollytree** · 28-05-2018, 10:48

So does the Quaife from Autolusso fit a 16v 12v gearbox (i hope thats what it is, the box came with all the bits when I bought it all.)
It was supposed to be a new box, and was painted bright clean red.
I put a new clutch cover and plate on the engine when I fitted it.

If am going to pull the engine, perhaps now is the time to get the rear damper mounting plates made correctly for a Corse I. Any body have the dimensions, or know where I could get some plates made up, if I can make up some templates?

Oh well, engine out and I can tidy up the rubber grommit thing round the gearshaft rod whilst I am at it. Anyone got any good product details for this.