Shortening a propshaft by 10mm?

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philhoward
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Shortening a propshaft by 10mm?

Post by philhoward » Fri Oct 02, 2020 6:59 pm

I can’t remember which way round it is (I’ve never had a 6 series) but anything is possible in the last 40 years.


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Shortening a propshaft by 10mm?

Post by rjeng » Fri Oct 02, 2020 7:45 pm

Hi there, gosh its along time (when one’s been enjoying driving the car) since I originally raised this concern: sorry that I forgot to give feedback at the time.
The good news is that I had my prop shortened as I proposed, and have driven 25k + enthusiastic miles since with no further problems or noises – and since 2015 this also includes having had the diff rebuilt (again), and having fitted a complete replacement O/D. Since 2015 the prop yoke has run comfortably with plenty of spare travel either way on its splines at the extremities of suspension travel.
I can confirm that my SE6a (1977: 7F52/182 02968) trailing arms are of equal length, and that my engine / transmission mounts so far back in the chassis, that removing the gearbox is always very difficult because the O/D output splined shaft clashes (overlaps) the welded chassis centre section. Whatever peculiarities my car has, it has just very successfully completed 3,400 miles around France; as it does most years.


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Shortening a propshaft by 10mm?

Post by scimjim » Fri Oct 02, 2020 8:08 pm

philhoward wrote:
Fri Oct 02, 2020 6:42 pm
Aren’t there different length trailing arms on a 6b? Eluded to be windy above.
I think we concluded that the later trailing arms had bigger bushes - so the overall length was longer, but the distance between bolt centres was the same.


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Shortening a propshaft by 10mm?

Post by surfer91919 » Fri Oct 02, 2020 8:10 pm

Many thanks for the update Roger!
So the noises etc went away with the shorter prop and the long prop issue didn't cause any immediate issue with the diff or o.d?
I'd better get mine shortened too. Wonder what is going on here... 6b props on 6a?!



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