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#Post#: 98277--------------------------------------------------
Which rear prop (52cm)?
By: TimXRO Date: July 3, 2015, 4:10 am
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Hi folks
Bit of advice if you wouldn't mind. The TattyWagon is a 1956 S1
88 bitsa with a SII gearbox and 109 rear axle. The rear prop has
disintegrated beyond repair and I need to get a replacement. Can
anyone suggest which one though? The old shaft was 52 cm from
face to face on the flanges.
Thanks for any ideas.
Tim
#Post#: 98278--------------------------------------------------
Re: Which rear prop (52cm)?
By: NoelC Date: July 3, 2015, 5:01 am
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When you say 109 rear axle, which series of 109? A series 3
Salisbury?
#Post#: 98279--------------------------------------------------
Re: Which rear prop (52cm)?
By: TimXRO Date: July 3, 2015, 5:09 am
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A series 3 Salisbury indeed.
So far the shortest prop I've found is FRC4907 which although
could even be correct for the original car seems to be minimum
54cm, quoted on johnrichardsurplus. So without further info
looks like it wont fit.
#Post#: 98280--------------------------------------------------
Re: Which rear prop (52cm)?
By: RMS Date: July 3, 2015, 5:41 am
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Problem is, as far as I know, a Salisbury wasn't a standard
fitment on a SWB.
As it was never fitted as standard, you probably won't find a LR
prop to fit.
The previous owner possibly either had the original prop
shortened, had one made or found one from another vehicle.
#Post#: 98282--------------------------------------------------
Re: Which rear prop (52cm)?
By: big-chris Date: July 3, 2015, 6:19 am
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As above, not a standard fit, propshaft developments in
Rotherham or similar in your area will be your next port of
call, my mate did the same conversion a couple of years ago..
Very short prop and a steep working angle, he had one built with
wider yokes to cope better, not your £50 from paddocks though...
To give you and idea, I had a new front one built for my LWB
when I lifted it, slightly longer with wider yokes = £150 :-?
If a standard prop fits the flanges you require but is just a
little too long they will be able to take a piece out and
shorten it for you, ie you buy a new standard prop and let them
cut it up!! Think their minimum work shop charge is about
£40.....
Hope this helps a little..
#Post#: 98285--------------------------------------------------
Re: Which rear prop (52cm)?
By: NoelC Date: July 3, 2015, 8:07 am
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^^^ :thumbs:
My mate attempted a similar conversion back in the early 90s.
The project never completed however he did enough investigation
to find out no factory prop was short enough for the Salisbury
in a SWB so a custom one would have been required. It seemed to
be the done thing back then to weld the spring mounting plates
in such a way as the axle tilted back a tad to reduce the
hammering the U/Js get. I suppose logically you need to work out
what's what and move the filler/level plug on the diff pan to
take this into account. If your axle is mounted level I'd think
wider yokes would be a good choice.
#Post#: 98293--------------------------------------------------
Re: Which rear prop (52cm)?
By: spitfiremk1uk Date: July 3, 2015, 4:51 pm
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As has been mentioned the salisbury/dana 60 is 1 3/4 inches
longer nose so in basic terms you need a prop that is nearly 2
inches shorter than any original fitment.
I have purchased several britpart props over recent years.
Fitted to a totally standard car they will JUST manage the UJ
angles needed. Any modification from standard such as 2 inch
dampers and parabolics and they run out of angle and the prop
UJs bind and they run out of spline movement making them useless
for applications other than standard cars.
The original landrover props have better UJ angles but even
these are considered "not very special".
So then you end up getting into special prop terratory. Wide
angle UJs/yokes, often with extended splines to cope with
increase axle movement and made to the correct length.
I have cheated a little in the past and mounted salisbury axles
1 inch further towards the rear of the car making it technicaly
an 89" wheelbase. I think this looks better when viewed from the
side as the wheel sits in the wheel arch much better and eases
the prop angle slightly. Tested and still the britpart prop UJs
run out of angle. Still needed a special prop!
#Post#: 98420--------------------------------------------------
Re: Which rear prop (52cm)?
By: TimXRO Date: July 17, 2015, 8:18 am
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Hard to tell but I reckon the rear is at 89". The old prop was
15 years old at least and seemed to work OK so for now I got my
locals to shorten the FRC4907 and I'll run it on the standard
yokes for now. It was the easiest thing to do at the time as I
needed the old girl back on the road.
Thanks for all your help folks. If things go pear shaped from
here I'll get into the world of wider yokes. Guessing I wont
know until I get a bot of articulation going and the current
yokes get tested.
Thank again.
#Post#: 98430--------------------------------------------------
Re: Which rear prop (52cm)?
By: spitfiremk1uk Date: July 18, 2015, 3:13 am
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It is easy to check for binding UJs and it is something you need
to do rather than think about. A binding UJ will snap props,
destroy UJs and sliding joints, snap diff pinions, destroy diff
pinion bearings etc.
Simply fit your new prop and jack the chassis up and let the
rear axle hang on the dampers. Now turn the prop. Any resistance
or "notchyness" will be the prop UJs binding. This test also
makes sure your sliding joints are adequate.
In an ideal world you would also test the other way, fully
compressing the suspension and doing the same test but this is
almost impossible to do easily.
Have fun.
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