axle tramp problem?

[wfracing]

hello, i have a 2002 holden vu ss ute, 6 speed manual. the problem i am having is if i dump the clutch in 1st or second gear the whole rear of the car shutters, is this normal for a ute due to having no weight in the back or is there away to fix the axel tramp as i love doing burnt outs but cannot stand the shuttering.

[StevieD]

Do a search on this- there are different rear suspension bushes you can use to slow down the tramp.

What I have found totally eliminates tramp is driver technique.

The utes don't respond well to dumping the clutch.

On factory street tyres if I want a quick launch I rev mine to 4000 rpm and let the clutch out as quick as possible without wheelspin maintaining the 4000 rpm (slipping the clutch)until the back wheels fully catch up to engine revs (clutch fully out).

Doing this my M6 ute takes off like a sling shot with no wheel spin or tramp :cool:

Good luck searching and experimenting with driving style

[wfracing]

thanks mate i have done a search on this site and found a few different types of bushes to stop the axel tramp, i will try one of them and let you guys know how i go.
thanks

[vycalais5.7]

easy fix, one of 2 ways to fix it; jam a few blocks of wood in the rear springs so they wont compress anymore:stupid: or just dont do it to the poor thing!

[wfracing]

yip yeah, no more axel tramp. just brought and fitted a notholane diff bush which cost me $40.00 and about half an hour to fit, what a difference.:yup:

[doogal]

yip yeah, no more axel tramp. just brought and fitted a notholane diff bush which cost me $40.00 and about half an hour to fit, what a difference.:yup:

bloody hell you dont muck around huh? posted that u were gonna get a bush last night and by 11am next morning its fitted. lol it would take me at least 2 weeks to get my bum into gear and get it organized:rolleyes:

[wfracing]

bloody hell you dont muck around huh? posted that u were gonna get a bush last night and by 11am next morning its fitted. lol it would take me at least 2 weeks to get my bum into gear and get it organized:rolleyes:

dude if i want something done i do it straight away no mucking around.

[mmm]

yip yeah, no more axel tramp. just brought and fitted a notholane diff bush which cost me $40.00 and about half an hour to fit, what a difference.:yup:

have you noticed any difference in car stability / reaction when driving / taking fast & slow corners?

[VU_SS_UTE]

yip yeah, no more axel tramp. just brought and fitted a notholane diff bush which cost me $40.00 and about half an hour to fit, what a difference.:yup:

Whats this bush??? :hmmm: Pics??

As im sick of axle tramp myself!

[AGENT ALFIE]

I would also be interested in this BUSH?? where did you get it from, my vy ute is absolutely shocking for axle tramping, makes me feel like the car is falling to pieces..

[mmm]

try a Pedders outlet & ask for 'diff mount bush'

i tried to find some pictures or info on the net but no luck
and me not educated enuff to describe to you

[wfracing]

try a Pedders outlet & ask for 'diff mount bush'

i tried to find some pictures or info on the net but no luck
and me not educated enuff to describe to you

i got the 'diff mount bush' from pedders and it cost me $40 and all you have to do is pull of the diff mount it is 4 13mm bolts and 2 22mm bolts, place a jack under the diff before you remove then just press the new bush over the old one, all this bush does is take up any movment in the exsiting bush. bolt it all back together and away you go. it takes about half an hour, pedders wanted anywhere between $120 to $150 supplied and fitted, bit of a rought for half an hours work.

[wfracing]

have you noticed any difference in car stability / reaction when driving / taking fast & slow corners?

it feels a little harder in the rear suspension but nothing to worry about and seems to handle better around corners.

[Nutter]

it feels a little harder in the rear suspension but nothing to worry about and seems to handle better around corners.

Funny you say that, considering the diff is bolted solid to the body and has no movment....are you sure this is what you felt?

[wfracing]

Funny you say that, considering the diff is bolted solid to the body and has no movment....are you sure this is what you felt?

well when was the last time you looked under a late model commodore with irs, the diff is mounted to a rear cradle which has about 4 to 6 bushes plus a diff bush. do you know what you are talking about????:rolleyes:

[StevieD]

Funny you say that, considering the diff is bolted solid to the body and has no movment....are you sure this is what you felt?

I think you'll find that they do move up and down. The diff mount reduces this greatly.

[wfracing]

I think you'll find that they do move up and down. The diff mount reduces this greatly.


thanks mate least somebody else knows what they are talking about.

[Nutter]

well when was the last time you looked under a late model commodore with irs, the diff is mounted to a rear cradle which has about 4 to 6 bushes plus a diff bush. do you know what you are talking about????:rolleyes:
yeah I know what an IRS rear looks like the bushes are to allow for flex and vibration dampening, the cars weight is not supported by the diff centre hence (independant rear suspension)........Im a mechanic by trade what do you do since we are going to take stabs???

The cars weight is supported by the springs and therefore will not ride harder, the springs attach to the control arms and NOT the diff centre, Do i need to prove my point or are you gonna get back in ya box.:flip2:

At best you may feel more jolt or vibration becuase its got a nolathane bush instead of rubber....

[wfracing]

yeah I know what an IRS rear looks like the bushes are to allow for flex and vibration dampening, the cars weight is not supported by the diff centre hence (independant rear suspension)........Im a mechanic by trade what do you do since we are going to take stabs???

The cars weight is supported by the springs and therefore will not ride harder, the springs attach to the control arms and NOT the diff centre, Do i need to prove my point or are you gonna get back in ya box.:flip2:

well i am not the one that said "the diff bolts straight to the body" when in fact it bolts to a rear cross member which is attached to the body by several bushes and a diff mount, please correct me if i am wrong:teach:

[Nutter]

well i am not the one that said "the diff bolts straight to the body" when in fact it bolts to a rear cross member which is attached to the body by several bushes and a diff mount, please correct me if i am wrong:teach:

You are wrong in the respect theres no movement in the mounting that will effect ride quality in the way you have said, the diff mount bush simply stiffens an already "solid" rubber mount to avoid lateral movment in the housing which then goes down the shafts and causes wheel hop.

Mate I have installed more bushes, springs and shocks than I can recall, on more cars than I care to remember, how many you have done or what your background is I dont know, but your not going to convince me that the car rides harder becuase you changed a diff mount from rubber to nolathane, considering during normal driving cruising etc that particular mount doesnt take up any suspension travel, simply alows the housing to move under power without transferring reasonance or shock through the body.

[wfracing]

You are wrong in the respect theres no movement in the mounting that will effect ride quality in the way you have said, the diff mount bush simply stiffens an already "solid" rubber mount to avoid lateral movment in the housing which then goes down the shafts and causes wheel hop.

Mate I have installed more bushes, springs and shocks than I can recall, on more cars than I care to remember, how many you have done or what your background is I dont know, but your not going to convince me that the car rides harder becuase you changed a diff mount from rubber to nolathane, considering during normal driving cruising etc that particular mount doesnt take up any suspension travel, simply alows the housing to move under power without transferring reasonance or shock through the body.

have you ever fittted a diff mount bush before as it sound like you have not, you do dont remove the rubber bush at all, you just add the nolathane insert
into the orginal bush which takes up any movement to prevent axel tramp which in fact makes the bush very solid and stiff. now tell me that wont effect the suspension or ride set up?:moon:

[Nutter]

Cars weight ride height etc is not supported nor effected by diff mount rubber, Im not wasting anymore time playing on words with you, back in your box :whip:, im going to go find some posts that make sense...

[wfracing]

there is no need to get upset, you are getting of the subject now trying to prove yourself on the statement you made which is wrong
Originally Posted by Nutter
Funny you say that, considering the diff is bolted solid to the body and has no movment....are you sure this is what you felt?
last time i checked the diff was bolted to a rear cross member supported by bushes which move up and down while driving, but correct me if i am wrong. i would hate to drive a car with a soild mounted, diff oh hang on they dont make them i wonder why:spew:

[StevieD]

Is it really worth putting boxing gloves over a minute difference in interpretation?

Bottom line here is that the diff cradle bush and also the rear cross member mounts eliminate most of the axle tramp we get from the IRS rear ends in the sedans and utes.

[markone2]

Bottom line here is that the diff cradle bush and also the rear cross member mounts eliminate most of the axle tramp we get from the IRS rear ends in the sedans and utes.


Wots :confused: axle tramp

[StevieD]

Wots :confused: axle tramp

when your back wheels go :errr: on take off

[wfracing]

Is it really worth putting boxing gloves over a minute difference in interpretation?

Bottom line here is that the diff cradle bush and also the rear cross member mounts eliminate most of the axle tramp we get from the IRS rear ends in the sedans and utes.

thats what i have been trying to explain, i beleive that if you put harder bushes or take up any freeplay or movement by either replacing the bushes or adding a insert you are going to get a harder and stiffer ride.

[StevieD]

I had my diff mount and rear crossmember mounts done almost 18 months ago now and I noticed a firmer ride out the back going over corrugations in the road.

After a week or so I didn't notice it anymore. It's not like changing the rear shocks and springs for a circuit set up that rattles all your teeth loose.

The bush change is definitely a worthwhile mod to mostly eliminate the tramp and a relatively inexpensive mod- which is unusual for L$1's

[wfracing]

I had my diff mount and rear crossmember mounts done almost 18 months ago now and I noticed a firmer ride out the back going over corrugations in the road.

After a week or so I didn't notice it anymore. It's not like changing the rear shocks and springs for a circuit set up that rattles all your teeth loose.

The bush change is definitely a worthwhile mod to mostly eliminate the tramp and a relatively inexpensive mod- which is unusual for L$1's

well said:burnout:

[Scenator]

Axle tramp is fscking sh1t. I hate it. It gives me the sh1ts when its wet, and the wheels will spin with minimal acceleration, and it looks and sounds terrible. Never had axle tramp in any other cars except commodores =\

[neb]

wfracing, does this new rear diff mount bush replace the old existing one or fit over/inside it somehow?

[SLEEPERVX]

wfracing, does this new rear diff mount bush replace the old existing one or fit over/inside it somehow?

It fits over the existing mount.

[blackr8clubby]

Nice to see a cheap and easy fix,or part fix,to a common problem,I have been looking for something like this,will give it a go.

cheers

[neb]

hi guys, i had my read diff mount bush put in yesterday, early stages yet but so far it has not fixed my axle tramp problem. i will give the ute a decent run on weekend and see how it goes. might have to go the rear crossmember bushes as well i think. from reading the other post , markone put a picture up of some bushes. i think these are the rear crossmember bushes?

[Animal]

Im a mechanic by trade what do you do since we are going to take stabs???



Unfortunatley being a mechanic does not make you a specialist in this feild. It is good to quote location points for the IRS and although it is bolted to the chassis, it does flex a fair bit though.

We have fitted a wide variety of components to reduce / prevent axel tramp in a whole heaps of cars. What works on one car does not necessarily work on another. Just how it is. It is frustrating.

The Noltec lit is a great start. The ride is noticeable firmer and they do have some results on the tramping.

It took fitting the Harrop diff housing / noltec bushes / Koni shocks to prevent the axel tramp on my Monaro. Only the shocks on another clients Monaro fixed theirs.

It also comes down to the amount of engine horsepower and tyre grip. I have seent utes on our private track days lay down rubber like they are sliding on ice. Others bounce the driver out of the seat.

[StevieD]

I was fortunate that the Noltec kit on the street has eliminated 95% of my tramp.

My factory tyres will tramp at WSID but I only run MT street radials now and they don't tramp :burnout:

[XsPwr2W8]

I find just changing between tyre compounds and road sufrace greatly effects axle hopping. And sometimes the softer compound tyres dont do it.

[commodoreking]

guys, if you want to have a look at a quality product check out the diff mount on the Harrop website:

http://www.harrop.com.au/root_folder/driveline_components/99-acvr6824-00.html

:bow:

[joffa]

i wish i could get rid of my axel tramp in my ute, so far i've put noltec bushes in, harrop diff cover, and koni shocks, and even polyair bags and still can't get rid of it!

[mmm]

try keeping traction.....your rubber will thank you

[Cobalt]

i wish i could get rid of my axel tramp in my ute, so far i've put noltec bushes in, harrop diff cover, and koni shocks, and even polyair bags and still can't get rid of it!

Tyres can make a huge diff to axel tramp.....

[Animal]

i wish i could get rid of my axel tramp in my ute, so far i've put noltec bushes in, harrop diff cover, and koni shocks, and even polyair bags and still can't get rid of it!

Sounds like it is time for a stroker then :burnout:

Have you used a different set of tyres to see if it does it with them too ?
Suprised that the air bags didn't assist you. That would have been my next choice too.

Just to make you feel a little better, I was at WSID on the weekend & there were 2 very well setup cars in Super Street that also had axle tramp. The guys were ready to weld braces to stop it.

[klink]

i got the 'diff mount bush' from pedders and it cost me $40 and all you have to do is pull of the diff mount it is 4 13mm bolts and 2 22mm bolts, place a jack under the diff before you remove then just press the new bush over the old one, all this bush does is take up any movment in the exsiting bush. bolt it all back together and away you go. it takes about half an hour, pedders wanted anywhere between $120 to $150 supplied and fitted, bit of a rought for half an hours work.


Just out of curiousity, did you have to break the welds and slide it in from behind and reweld it?

Does yours stick out the front of the mount (engine side).

I have seen several and they all had the back cover removed and rewelded. I had one put in my car 6mths ago and mine sits slightly forward,

It solved my axel tramp up until last night when all of a sudden it returned with a vengance, i have been meaning to redo mine for a while as it seems to have moved putting tailshaft on a slightly different angle to normal. Guess i got no choice now,