axle tramp problem?

[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????

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.

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.

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

[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

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?

[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 , 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

[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 axle tramp

[StevieD]

Wots axle tramp

when your back wheels go 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

[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 =\