tony-devon
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| posted on 6/9/10 at 07:28 AM |
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sierra propshaft UJ running angles
Greetings, I know that in an ideal world things would be run as damn near straight as possible
well!! my garage isnt an ideal world, and I wasnt prepared to make sacrifices in the way of sitting a diff 3" to the left just to make the props
life easier LOL
what I am trying to find out is what is the max/safe running angle of the UJ on a sierra propshaft?
I have already had to alter the jog and move engine another 100mm away from the diff to get it somewhere near to where I reckon it will be ok, but as
I cant get a propshaft at the moment, Im relying on luck mainly
so anyone that can help with specs for the joint?? would be greatly appreciated
thanks
Tony
[Edited on 6/9/10 by tony-devon]
heavy is good, heavy is reliable, and if it breaks, hit them with it
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johnemms
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| posted on 6/9/10 at 07:35 AM |
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A big factor that i discovered on here (also an obvious one) was that the gearbox flange and the diff flange must be square and run parellel to each
other..
If not it will shake the car to bits..
Some one will give a better explanation in a bit or put a link to the old topic.
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Doofus
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| posted on 6/9/10 at 08:00 AM |
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I ran the rear UJ dead straight on my old car for 5000 miles and it wore the bearings so they went notchy, because there was no articulation. A small
angle should prevent this.
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tony-devon
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| posted on 6/9/10 at 08:30 AM |
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thanks, yes running them dead straight will flat spot the bearings
my problem is that although the offset of the diff to gearbox flange isnt huge, I want the propshaft as short as possible
Im not prepared to do as others have in this style of build and move the diff to one side, then you go unequal length shafts, preload wound up more on
one side etc etc, besides that, when sat behind it, it looks gash! LOL
things sit on the centreline or in the bin as far as Im concerned.
so Im having to let the maximum safe working angles of the UJ's define the length of the propshaft and therefore the setup of my jig
as a slight aside, I see a few front propshafts on ebay, and being shorter people are willing to ship them, does anyone know if the UJ flange will
mate up with a rear diff?
heavy is good, heavy is reliable, and if it breaks, hit them with it
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trikerneil
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| posted on 6/9/10 at 03:57 PM |
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I am running approximately 4-1/2" offset and an 18" propshaft on my Trike.
The UJs look to be almost at the limit of their articulation but seem OK over approx 5000 miles, I only have 90 BHP to play with though.
As said before you must get the flanges parallel in both planes.
HTH
Neil
ACE Cafe - Just say No.
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