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[Patriq Backlund]

I've recently bought a 33 SW Q4 1993 . I drove a 33 SW 4x4 -89 earlier. I'm just wondering, are all P4 jerky and "jumps" around tight corners ? I experience something that reminds me very much of when I by mistake drove my 4x4 on asfalt with 4x4 engaged and took tight corners.

Or is there something wrong in my differential ? I also have a noice, mostly bearly audiable but sometimes very clear, that reminds of something like brakes that do not release interely. Only it isn't the brakes, that I know. Usually I only hear it if I fold my rear seats and listen for it intentionally. But sometimes the noice is heard over all other sounds in the car. It comes from the rear of the car. Could it be the roatating mass ? Differential, or what ?

Sincerely,
Patriq Backlund, Norway.

[Admin]

Hi

They should not jump around, although they doo seem more prone to jump sideway on a bump when cornering hard. It is the viscous coupling that allows the front and rear wheels to turn at slightly different speeds. That is a large cylinder under the car just behind the gearchange. Check it is there and someone hasnt taken it out and replces it with a swtichable 4x4 prop shaft.

Suspect your noise is either a diff bearing or a wheel bearing. Without being there to hear it I cannot really say whether it is worth worrying about

All the best

Keith

[Patriq Backlund]

Hi !

Yes, the viscous is there alright.
It doesn't really jump, but there are "knocks" when f.ex. manouvering in a parking lot.
I've recently had a new bearing mounted on one side rear and the other side works just fine as well. That means I'm suspecting the differential.

Every once in a while the '4x4' light lights up in the panel whilst driving. And sometimes it goes of again whilst driving. But this doesn't seems connected in any way with the noice from the rear.

I'm planning to dismantel the dif. later this fall.

But basically with this post I was just curious if the P4 should always be supersmoth, no matter how hard the steering wheel is turned or if it is common with the "knocks" or "thrusts" that I'm experiencing?

Sincerely,
/Patriq Backlund - Norway

[Admin]

Hi

The P4 often has thumps at low speed through the floor. The problem is the viscous coupling which tries to only allow a small variation in the speed of the front and rear wheels. On a tight corner the front wheels have to turn a fair bit faster than the rear wheels, and the viscous coupling jumps around in its mounts as it tries to cope

All the best

Keith