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Whats wrong here?
coozer - 21/7/12 at 07:38 PM

Can anyone point out, if anything whats wrong with this propshaft please??

liam.mccaffrey - 21/7/12 at 07:43 PM

not welded at one end?

Alfa145 - 21/7/12 at 07:43 PM

Bolt missing of the back flange?

jollygreengiant - 21/7/12 at 07:45 PM

Looks like its attached to a Land Rover.


'NUFF said

Ben_Copeland - 21/7/12 at 07:47 PM

1. Theres a nut missing
2. Theres a bolt missing
3. One end of the prop tube isnt welded to its joint

coozer - 21/7/12 at 07:48 PM

Lol, its mock up, they are Range rover bits going on my Jago... been advised it would lunch the front uj but no explanation so thought I'd ask here..

ReMan - 21/7/12 at 07:49 PM

Both Yokes in alignment
5001

slingshot2000 - 21/7/12 at 07:56 PM

quote:
Originally posted by ReMan
Both Yokes in alignment



Yes ReMan is correct, the yokes should be out of phase by 90degrees.
I also seem to think that the sliding joint should be at the top/gearbox end and not the axle end (I will check that and get back to you)!

Regards
Jon

owelly - 21/7/12 at 08:03 PM

I disagree. I think the yolks are just fine.

coozer - 21/7/12 at 08:05 PM

Cheers Jon, it will go on either way.. I was a bit puzzled but I put it back together like that cause it was like that when I got it!

steve m - 21/7/12 at 08:05 PM

That is weird, as when i made my propshaft, and had both yokes alligned together (i did that!) as per your pic
The guy that balanced my Prop, told me it did not make a jot of difference, as long as the prop was balanced
it would not make any difference

I do hope so, as ive lived with my prop, sitting 9" from my left butt, for about 8000 miles !!

Steve

mark chandler - 21/7/12 at 08:06 PM

Slide should be at the gearbox end so wrong way around, on a range rover it would have been at a much greater angle so will not have any issues.

Yokes are as Landrover would have placed them BTW, although look wrong are correct.

Someone's giving you BS !

[Edited on 21/7/12 by mark chandler]

owelly - 21/7/12 at 08:08 PM

I'm sure the Landy handbook says the front prop shaft should be 30 dgrees out of phase to eliminate any rumblings. But I've fitted dozens of prop shafts, all in phase and none have flown to bits or worn out prematurely.

ReMan - 21/7/12 at 08:12 PM

What difference does it make which end the slide is?

Dusty - 21/7/12 at 08:35 PM

Hardy Spicer joints are not constant velocity. That's why they are used in pairs, yokes aligned as shown, input and output angles equal and opposite if possible (by fitting the gearbox and back axle so that the gearbox output shaft and diff input shaft are parallel) and a sliding joint in place. All good really except I would say from the pics the gearbox end angle is quite sharp and the diff angle seems almost straight. This will produce stress. Probably not enough to notice or make a scrap of difference off road.

JoelP - 21/7/12 at 09:33 PM

As dusty says, the diff nose is pointing up a fair bit, meaning the two joints wont cancel eachother as effectively. No idea if this makes a difference in real life but its 'wrong' according to common advice.

ps id say the yokes are ok that way round, but ive had a few beers and dont intend to waste ages pondering it!

[Edited on 21/7/12 by JoelP]

mark chandler - 21/7/12 at 10:03 PM

If you want to see yokes in different planes then look at a classic range rover front prop, the diff is angled up with the gearbox parallel with the chassis, still good for 100k miles.

When I used to race range rovers/land rovers we used to grind out the back of the yoke to make more room for prop to twist, better still use the rear yokes from the back propshaft as these are deeper, its amazing how far you can twist these things.

I really would not worry

coozer - 21/7/12 at 10:12 PM

quote:
Originally posted by Dusty
Hardy Spicer joints are not constant velocity. That's why they are used in pairs, yokes aligned as shown, input and output angles equal and opposite if possible (by fitting the gearbox and back axle so that the gearbox output shaft and diff input shaft are parallel) and a sliding joint in place. All good really except I would say from the pics the gearbox end angle is quite sharp and the diff angle seems almost straight. This will produce stress. Probably not enough to notice or make a scrap of difference off road.


Its not possible to line the flanges up, you want see how far the front ones are out!

I have a classic range rover front prop and I'll angle that one the same.

Heres the front prop..



[Edited on 21/7/12 by coozer]

designer - 21/7/12 at 10:23 PM

Gearbox output shaft and diff input shaft must be parallel.

coozer - 21/7/12 at 10:38 PM

quote:
Originally posted by designer
Gearbox output shaft and diff input shaft must be parallel.


Its not possible! Front diff points up as the steering geometry insists so even if the trans was level, which it isnt, there would be tons of angle at the trans output.. this isnt possible with a big 4x4 and thats why theres big angle and double cardon joints available.

Plus what you cant see is the props angle in the other plane as the diffs arnt at the same position as the trans output.

ReMan - 21/7/12 at 10:38 PM

quote:
Originally posted by designer
Gearbox output shaft and diff input shaft must be parallel.


Or as near as possible....

Peteff - 22/7/12 at 08:20 AM

quote:
Originally posted by designer
Gearbox output shaft and diff input shaft must be parallel.


That's why it has a slider in because they can't always be parallel. It's not the ideal solution and should really allow for length changes not misalignment but it seems to work out alright.