I have recently changed the transfer box (Borg Warner) on my 1990 RRC the old one had a stretched chain.

Since putting the s/h replacement unit one on (which incidentally was filled with Ep90 when it arrived, now changed back to dextron) i have a tyre squeal (front passenger side) when cornering to the right at relatively slow speeds. This tyre is also warmer afer a short run than the other 3 tyres.

Left hand corners & the driver side wheel has no squeal even when cornering hard, all i can hear from drivers side is the rubber gripping the tarmac but no squeal.

I have changed the tyre from a chunky mud tyre to a smoother road tyre, with no difference in the squeal.

I have jacked up both front wheels individually, put hi/lo into neutral and turned the wheels by hand, both wheels needed a similar torque to turn them, about 20 secs to turn 1/4 of the way round.

Looking on the net & this site tyre squeal seems to suggest viscious coupling problems but the results of my tests suggest the VCU has not seized.

Any ideas of where to look next would be useful to me,

Thanks, Mike

I would have said viscous coupling but if you have discounted this then perhaps a binding brake calliper? I'm p***ing in the wind with that but it maight be worth making sure all the brakes are free and the noise is not actually off the back end.

Had the front axle jacked up two days ago, both front wheels turn freely. Discs are clean, no sign of binding & it is only the tyre that gets warmer after a short run. The rims are all at similar temperature suggesting that the passenger side tyre is scrubbing with the heat caused by friction rather than transfering heat from brakes etc through rims.

Noise is coming from front pasenger side wheel, you can hear it clearly with window open & head out...& someone else driving...

Also the tyre pressures have been checked.

Ta for suggestion.

Have you checked all the tyre pressures?

The first source of tyre screech is soft tyres.

A worn(as in locked up) VC will spin out its torque on the tyre with the least load which is likely to be the outside rear on a corner and should screech no matter which direction you turn.

recchem said:

Also the tyre pressures have been checked.

Click to expand...

yep checked.

I've done the checks for viscious coupling, am sure its passsenger side front tyre & it only makes a noise on right hand corners, i dont need to go fast, a mini roundabout at normal slow speed will squeal. I have changed tyres getting same noise ....im stumped....

recchem said:

yep checked.

I've done the checks for viscious coupling, am sure its passsenger side front tyre & it only makes a noise on right hand corners, i dont need to go fast, a mini roundabout at normal slow speed will squeal. I have changed tyres getting same noise ....im stumped....

Click to expand...

try swapping the wheels over if youve tried most other things?

recchem said:

I have changed the tyre from a chunky mud tyre to a smoother road tyre, with no difference in the squeal.

Click to expand...

Tried that, i have a set of mud type & a set of smoother road tyre, it makes no difference, i still get the squeal.

Must be hub bearing or tyre rubbing boddy work. What sizes are you running?

Have you got brake pads with wear indicators?, could need some new pads?
Also is your wheel camber/ toe-in set correctly?