how to stop axle tramp

[manual vz sv6]

hey guys was just wondering how to stop axle tramp
any help would b great thanx

[bigdaddycool]

I second this question. I have a seriously bad case of it......... Mine's more self inflicted due to pushing the Optimal Torque, VE and Spark Tables........ and now i'm moving to the Variable Cam Phasing it's only gunna get worse. I've backed right off my tune because it'll break something.

My thoughts are better diff........ but it's odd because V8's make alot more power and dont stuffer this problem?

[andyman]

rear shocks stuffed, rear diff housing bush has play in it, there the main two that comes to mind,

nolathane has a bush that fits into the rear diff mount to make it more rigid, apparently thats a point of inducing tramp

[impulsive]

might be worthy checking your rear tailshaft rubber coupling too.. How much play should there be in the diff andyman, i know a little is un avoidable but how much is too much?

[GTRwilson]

A mate of mine gets it fairly bad in his brand new VE SV6 Ute so his shocks/bushes ect couldnt be worn or damaged surely? Unless the holden items are all that good?

[bigdaddycool]

Alrighty I took mine down to Pedders today to find out whats up with mine........specifically to do with the rear it came down to:

2 bushes for the rear suspension, 2 rear gas shockies, Urethane Various Bush and a wheel alignment.

That was specifically for the rear only.

I asked them about my rear diff mount which I felt needed doing they said that it's really irrelevant because the diff which mounts onto the main suspension side of it, what happens is the two main bushes wear and the whole suspension frame moves (forget the name of it) ......... causing the diff to move itself with it a bit.

On my car I have to replace two front rear bushes for the front steering as well, total quote $890.

I'll be getting it done soon, but they recon that's basically go for the axle trunk side of things.

PS. Their report shows I have worn X Member Mounts specifically for the rear.

[manual vz sv6]

yeh i think i need to do something like that its not to bad now but its getting worst so yeh
thanx for ya help
bigdaddycool you were takin bout cam phasing wats that bout

[andyman]

might be worthy checking your rear tailshaft rubber coupling too.. How much play should there be in the diff andyman, i know a little is un avoidable but how much is too much?

the rear diff mount is obviously a rubber bush in a bush, so youu get a lil bit, the nolathane insert is a bush that pushes into the rear mount, it dosnt replace it, just firms the stock one up

A mate of mine gets it fairly bad in his brand new VE SV6 Ute so his shocks/bushes ect couldnt be worn or damaged surely? Unless the holden items are all that good?

if traction control kicks in, yes its the same effect as axle tramp, try it without esp on

Alrighty I took mine down to Pedders today to find out whats up with mine........specifically to do with the rear it came down to:

2 bushes for the rear suspension, 2 rear gas shockies, Urethane Various Bush and a wheel alignment.

That was specifically for the rear only.

I asked them about my rear diff mount which I felt needed doing they said that it's really irrelevant because the diff which mounts onto the main suspension side of it, what happens is the two main bushes wear and the whole suspension frame moves (forget the name of it) ......... causing the diff to move itself with it a bit.

On my car I have to replace two front rear bushes for the front steering as well, total quote $890.

I'll be getting it done soon, but they recon that's basically go for the axle trunk side of things.

PS. Their report shows I have worn X Member Mounts specifically for the rear.

well pedders is pretty stupid then, the rear diff mount is important because it hold the rear in end up in the car, if the rear bush in the diff mount flex's or is cracked, it will cause the rear cross member to move around and vibrate, generally under high load, so accellerating, hence causing the vibration

lowered cars with small springs and rooted shocks will also cause this, mainly becasue when you lower the car the angle of the cv shafts change, so with big power, they can slightly lever themself from the angle and cause the vibration, utes are worst

[BrAdAsS]

I got the said Nolathane/red ranger diff insert bush and the Pedders Axle tramp bushes, The tramp bushes stiffened up the sub frame which you can feel but it didn't do anything for my axle tramp...

I can't spin the wheels in a straight line without the whole car vibrating and banging, go sideways and it doesn't do it at all... I got a locker in mine which is what caused the tramping in the first place.

My next step is going to be the harrop sports diff cover then down the line change the rear shocks and or springs to firm it up and see what that does.

[GTRwilson]

if traction control kicks in, yes its the same effect as axle tramp, try it without esp on

Im pretty sure it happens even when the esp is off.

[danja]

I've got one of those diff inserts, they firm up the drive line a bit.

The good part is the car feels more responsive because when you get the power on it doesn't have to take up the slack in the diff bush, it just powers on, the bad part is a little more noise in the cabin and it's a little harsher.

It didn't really solve my clunking either, I think I have too much lash in the gears which is going to need some specialist work to remedy. Does anyone know if adjusting the pre-load can solve ye olde Commodore diff clunk?

[andyman]

I've got one of those diff inserts, they firm up the drive line a bit.

The good part is the car feels more responsive because when you get the power on it doesn't have to take up the slack in the diff bush, it just powers on, the bad part is a little more noise in the cabin and it's a little harsher.

It didn't really solve my clunking either, I think I have too much lash in the gears which is going to need some specialist work to remedy. Does anyone know if adjusting the pre-load can solve ye olde Commodore diff clunk?

depends on where the slack is, you could get away with spacing the diff centre with the adjusters on the side, or you might have to get a new colapsible spacer and reset the adjustment from the pinion position

[danja]

depends on where the slack is, you could get away with spacing the diff centre with the adjusters on the side, or you might have to get a new colapsible spacer and reset the adjustment from the pinion position

Which adjusters are you talking about? Is this something which requires disassembly of the carrier?

[Ray-915]

i keep getting told the harrop diff cover makes a world of difference along with the nolathane bushes. Is wat i will be tryn neway

[wikky]

My thoughts are better diff........ but it's odd because V8's make alot more power and dont stuffer this problem?

Yep V8's certainly do suffer. You can not totally stop axle tramp, but only reduce it. Ways to do this are better suspension components, better bushes and a Harrop diff cover. Doing this will make a dramatic difference.

[calay]

worn tyres will also make tramp bad - when i replaced the tyres on my old car it completely went away. but then again, the tyres on my calais are fair rooted and they don't skip at all, and the rear suspension is completely shagged!!!

alternatively, stop doing skids...

[dynoryder]

hi i just read the first few posts vn-vz rear end irs cradle bushes and diffmount shocks just mask the prob

ve rear cradle bush inserts

this will stop tramp as much as you can

note vn-vz cradle bushes have a extra optional spacer from nolathane and or pedders to stop tramp

btw i work for pedders

[Corbs1234]

axle tramp? could someone just explain what this is? or is there another thread on this?

[dynoryder]

it is when you try to take off or do a burnout and the wheels bounce up and down

my mates vr ute gets it real bad

[HoZy]

hi i just read the first few posts vn-vz rear end irs cradle bushes and diffmount shocks just mask the prob

ve rear cradle bush inserts

this will stop tramp as much as you can

note vn-vz cradle bushes have a extra optional spacer from nolathane and or pedders to stop tramp

btw i work for pedders

Saying you work for pedders enhances your chances of me not giving a damn about anything you say.

Cheers
MaT

[HoZy]

it is when you try to take off or do a burnout and the wheels bounce up and down

my mates vr ute gets it real bad

How about you fix your "mates" car if you work at pedders

[Grennan]

hi i just read the first few posts vn-vz rear end irs cradle bushes and diffmount shocks just mask the prob

ve rear cradle bush inserts

this will stop tramp as much as you can

note vn-vz cradle bushes have a extra optional spacer from nolathane and or pedders to stop tramp

btw i work for pedders

I thought your motto was no bull?

[Corbs1234]

right o. just had a read elsewhere then. i've only ever had it happen in the wet when i give it too much turning a corner. i suppose the lack of weight over the rear axle (being a ute) doesnt help either...
feels similar to traction control kicking in right?

[wikky]

hi i just read the first few posts vn-vz rear end irs cradle bushes and diffmount shocks just mask the prob

ve rear cradle bush inserts

this will stop tramp as much as you can

note vn-vz cradle bushes have a extra optional spacer from nolathane and or pedders to stop tramp

btw i work for pedders

That's crap, crap and more crap. And just because you work for Pedders doesn't mean squat. The lady that answers the phone at the service counter works for Pedders too....

[Ray-915]

right o. just had a read elsewhere then. i've only ever had it happen in the wet when i give it too much turning a corner. i suppose the lack of weight over the rear axle (being a ute) doesnt help either...
feels similar to traction control kicking in right?

My clubby stills tramps bad at times. But yeah only at certain times like in the wet or on a sticky track (not townsville dragway, that place is never sticky lol) if i dont feed it enough wen doin the burnout. Either way it feels like the car is guna fall apart.