F.A.O. Austen (Bell Engineering)

Hi Austen,

I would be very grateful if you could clarify a problem I think I may have with my prop/VCU.

I had both the bearings changed about 15 months ago by a garage, yesterday I had to fit two new bearings again (I did this myself) after the bearings were fitted I noticed the UV joints were not in line with each other. If you can imagine a clock face the rear UV joint was at: 12 o clock, Quarter past, Half past, and Quarter to.

The front UV joint was at: Ten to, Five past, Twenty past, and Twenty five to,

I'm thinking the front prop shaft was not put back together on the splines in the correct position the first time the bearings were changed.

Please could you give me your thoughts on this.

Many thanks

Grayo

It makes no difference what so ever, the vcu slips so within 10 yards of driving the front and rear prop alignment has changed. Its all a load of balls about marking how the prop is bolted to the ird and rear diff, makes no difference what so ever.

austen said:

It makes no difference what so ever, the vcu slips so within 10 yards of driving the front and rear prop alignment has changed. Its all a load of balls about marking how the prop is bolted to the ird and rear diff, makes no difference what so ever.

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Thank you Austen, for your reply it's very much appreciated. I can stop worrying now. LOL

You can thank your different diff ratios for this .

Grayo said:

Thank you Austen, for your reply it's very much appreciated. I can stop worrying now. LOL

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Yup, never marked mine.

all i did was to make sure that the bearing carriers were at 45 degrees to the chassie, so they were running strait

Don't you mean 90 degrees

teddywood1 said:

all i did was to make sure that the bearing carriers were at 45 degrees to the chassie, so they were running strait

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What I did with mine was to use a sliding square Put the flat edge against the VCU in a verticle position then slide the rule to the edge of the bearing carrier adjusting each side until both were the same measurement distance from the VCU. Did the same with the front bearing, both bearings look smack on but only time will tell.

teddywood1 said:

all i did was to make sure that the bearing carriers were at 45 degrees to the chassie, so they were running strait

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I'm not convinced that the VCU needs to be mm perfect on 90° with the chassis as the IRD output is off to the driver's side of central anyway!! As long as the VCU bearing carriers are at 90° to the VCU shaft when it's bolted up to avoid side loads on the bearings.

Always thought they were in a straight line

Freelaner said:

Always thought they were in a straight line

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Rear diff to VCU is strait. The VCU to IRD is off the the right by some way!!

Freelaner said:

Always thought they were in a straight line

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The rear prop and the VCU are in a straight line. The front prop at the UV joint goes off at a slight angle towards the IRD.

Grayo said:

The rear prop and the VCU are in a straight line. The front prop at the UV joint goes off at a slight angle towards the IRD.

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I know that now I read nodges post

Freelaner said:

I know that now I read nodges post

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Nodge types faster than me!! LOL