Rear wheel revolution
Posted: Mon Sep 12, 2016 6:23 pm
Hi,
No, rear wheels have not risen up against their oppressive drivers demanding equal rights as front wheels!!
My question is one I've been meaning to ask for some time and is something I first noticed on Abby, the two door I owned previously....
With the rear wheels jacked up and the rear axle supported by axle stands, turn the engine on and put the car in gear (2nd in this case).
I have noted that with both of my 4.22 diffs (when fitted to Abby) that the wheel on one side rotates and the other does not or (in a different gear) does so considerably slower than the other.
Given a helping hand (extra manual spin from me) you can feel it engaging and picking up on the forward (or reverse) momentum being supplied by the diff / prop / gearbox, presumably imitating what it does in practice, when on the ground and the car is being driven.
Today when I had Olwyn up on stands, whilst greasing her nipples, I decided to see it the diff fitted to her drove the wheels in the same way. Sure enough one wheel rotates freely whilst the other is much slower (and even a bit clonky -- something I've not noticed when driving her though??).
Is this normal for these type of diffs?? Or a sign they need rebuilding?? Basically should they be driving both wheels at the same speed?? There was no sign of excessive wear on the either of the 4.22 diffs when I checked them and the splines on the half shafts seemed good too -- I haven't looked and Olwyns splines yet, so can't comment on them.
I have to say I've never found this causing any noticeable issue when driving either Abby or Olwyn.....
Many thanks for your thoughts on this,
Mike.
No, rear wheels have not risen up against their oppressive drivers demanding equal rights as front wheels!!
My question is one I've been meaning to ask for some time and is something I first noticed on Abby, the two door I owned previously....
With the rear wheels jacked up and the rear axle supported by axle stands, turn the engine on and put the car in gear (2nd in this case).
I have noted that with both of my 4.22 diffs (when fitted to Abby) that the wheel on one side rotates and the other does not or (in a different gear) does so considerably slower than the other.
Given a helping hand (extra manual spin from me) you can feel it engaging and picking up on the forward (or reverse) momentum being supplied by the diff / prop / gearbox, presumably imitating what it does in practice, when on the ground and the car is being driven.
Today when I had Olwyn up on stands, whilst greasing her nipples, I decided to see it the diff fitted to her drove the wheels in the same way. Sure enough one wheel rotates freely whilst the other is much slower (and even a bit clonky -- something I've not noticed when driving her though??).
Is this normal for these type of diffs?? Or a sign they need rebuilding?? Basically should they be driving both wheels at the same speed?? There was no sign of excessive wear on the either of the 4.22 diffs when I checked them and the splines on the half shafts seemed good too -- I haven't looked and Olwyns splines yet, so can't comment on them.
I have to say I've never found this causing any noticeable issue when driving either Abby or Olwyn.....
Many thanks for your thoughts on this,
Mike.
) on a hard surface - and in between are expensive and ever more complicated limited slip differentials that can be set to deliver variable drive to each wheel as required.