Outer Limits 4x4 Board

Hey fellas,

I have a sprung over 75s and used to have great pinion angles...

My rear pinion to drive shaft angle has rotated over 0deg from not having a rear wrap bar.

do u think this angle will cause problems?

do u think i could bend it back when i build a wrap bar by making the end sit too high and just push it down to get it into the shackle pin?

I guess you have two issues, axles wrap and pinion angles. Does it vibrate at all under acceleration?

You gotta do something about your axles wrap...An anti-wrap bar is the most obvious but a lot of work.


I was talking to a very knowledgeable suspension guru who's been in the game a long time...He stated that he used to combat axle wrap by installing a half leaf on the top of the pack from the housing to the front mount for the rear spring. Doesn't affect flex but when it tries to wind up under load it has to do this against that spring. I'm going to try it in my zook.

If your pinion angle is out at ride height then maybe look at some castor wedges to bring the pinion angle back towards the ground a bit.

Edit: having another look at your pic, your pinion angle will improve as the axle wraps! Still something to look at because your springs will hat you for it...

Yes that angle is going to cause problems. for it to have already gone that far, you must have MASSIVE axle wrap under power.

You've bent your springs now so trying to "force" the axle back with a traction bar is going to be an issue- there's going to be an amazing amount of force on the traction bar if it's fighting the springs even before it has to do anything.

You've discovered one of the great truths about SPOA cars - the spring rate required for a good ride and flex isn't enough spring rate to control axlewrap.

Steve.

Sorry for bit of a hijack.

But what are peoples thoughts on this one?

It does have a bad driveline vibration too




And if anyone has any suggestions on where to take it so they can have a look, that would be good - Melourne area

BushTuckerNed wrote:Sorry for bit of a hijack.

But what are peoples thoughts on this one?

It does have a bad driveline vibration too




And if anyone has any suggestions on where to take it so they can have a look, that would be good - Melourne area

Sandy.

Yeh hes on the cards.

Your diff looks pretty doesnt it lockee

BushTuckerNed wrote:Yeh hes on the cards.

Your diff looks pretty doesnt it lockee

Why not get longer top arms?

Weiner wrote:

BushTuckerNed wrote:Yeh hes on the cards.

Your diff looks pretty doesnt it lockee

Why not get longer top arms?

Its a bit more envolved than that. Gotta change the mounts for coilovers and arms i think...to keep all the geometry the same

BushTuckerNed wrote:Yeh hes on the cards.

Your diff looks pretty doesnt it lockee

Apart from the Orange bits.

Z()LTAN wrote:Hey fellas,

I have a sprung over 75s and used to have great pinion angles...

My rear pinion to drive shaft angle has rotated over 0deg from not having a rear wrap bar.

do u think this angle will cause problems?

do u think i could bend it back when i build a wrap bar by making the end sit too high and just push it down to get it into the shackle pin?

Looks to be on the edge of self destruct , try doing a bit of a step and i would say that will bind and make a mess .
Time for new springs and an anti wrap bar,

Do those orange bits bind on droop at the rear ?

nah, there just std nissan set up too

when we built my zuk SPOA on lux leaves with lod leaf removed the pinion angle was set just a touch high, nothing serious - however after a bit of spring wrap and a year of use the springs are now settled nice and flat and the pinion angle was shot to bits - even with a trac bar there was no bringing it back (unless i got new springs again)... in the end the solution was simple, and a pain in the ass - cut off the perches and re-set the pinon angle with the current leaves in.

This said though - if thats the full extent of the angle you might get away with some 8 degree wedges in the leaf pack?

Z()LTAN wrote:Hey fellas,

I have a sprung over 75s and used to have great pinion angles...

My rear pinion to drive shaft angle has rotated over 0deg from not having a rear wrap bar.

do u think this angle will cause problems?

do u think i could bend it back when i build a wrap bar by making the end sit too high and just push it down to get it into the shackle pin?

I say, not really, if your just driving it on the road, it will wear out the uni's at an accelerated rate.

Those leafs will/can snap in half now, be aware of that, because after you S them like you have, they can crack in the center of the u-bolt, and or on the from of the u-bolt/spring plate. Take it bush, and stick the big wheels on it, it will also fail - its only a matter of time...


If that sucker breaks at 100 klicks, its game over mate...

I've been where you are. I have snapped leafs, and after it went in the bush, we got the car home by stripping a high-lift jack down, and bolting it in place, and limping the 4wd out of the area and home.

Dozoor wrote:Looks to be on the edge of self destruct , try doing a bit of a step and i would say that will bind and make a mess .
Time for new springs and an anti wrap bar,

I agree. I'd be pulling the plates off and having a look for hairline cracks. And if i had some spare leafs kicking around, I'd defently be sticking some leafs back in the pack's until i decided what I was going to do with the rear end.

I take it, that you have removed leafs, to gain more flex, and also a better ride quality??

fix's
- Load leaf like the Hi-lux's have - cost is articulation, and also ride quality
- Track bar combined with new packs - the current ones you have in place and beyond help.

BTN

This is Wendles Set up





I mean, i see no reason to why you cant keep the current geometry by;

- making the upper arms longer
- making the lower arms shorter
- Moving the coil over mounts

only advantage I see is the ability to keep the factory oil capacity the same, without adding extra to compensate for a raised pinion angle...





Also, do the lower arms bind in the highlighted area?

Cheers for the inpuit fells

Cheers reddo ill see what i can do.

These are Parabolic type leaf springs and are only designed to have 2 leaves.

They are almost brand new too

Z()LTAN wrote:Cheers for the inpuit fells

Cheers reddo ill see what i can do.

These are Parabolic type leaf springs and are only designed to have 2 leaves.

They are almost brand new too

ahhhhhh

Well, i can't say I've had any experience with Parabolic leafs, so what i have said may well be wrong...

Good luck with it then