Its amazing the things you learn hanging around rally service areas.

This is not a cento problem, yet, but may raise its ugly head.

Fiat are not the only ones to use bonded crown wheels.

The topic of conversation today was Pugwatt bonded crown wheels, and how with additional shocks fed through them in rallying/racing/sprinting etc they can become 'unbonded'.

If anybody suddenly looses drive, and the shafts are intact, this may be the issue.

This has been tagged for the future

Cheers

SPD

It is an issue with heavier fiats, have been in bravado when it happened. The LSD group buy showed it up, and for fitting the LSD needs a bolted crown. Details of which cars tend to have bonded ones check the LSD thread

Also an issue on old ford essex engines, but on the timing side of things. MOdiffied wheels are readily available.

IMHO bonded = bad

kritip said:

Also an issue on old ford essex engines, but on the timing side of things. MOdiffied wheels are readily available.

IMHO bonded = bad

Click to expand...

Was that not a cog made of fibre, rather than a bonded issue?

Cheers

SPD

One potential problem is not the bonding but process failures - like too much polish spirits on Friday.

More than 30 years ago my mate had a 2l Ford engine at front with rear wheel drive, and the propellor shaft was bonded.

He was a traveller got a company car and it was a new car, the car spent weehends under warrenty having the shaft re-boned, they cannot have all been like that?

Noel