Fg Axle Tramp .. Or Diff Bush?

[Seaton]

Maybe calls for a better shock, as the koni is only adjusting the rebound and not the bump,

but, really doesn't look like those arms are doing what the centre is anyway. But I'm no specialist.

Out of curiosity, how did you go last time the wound the rears up? Was it better? They only have 5 half turns from soft to hardest rebound settings. Pat told me to put mine at 1 full turn, so if you went further again than that, you probably have little left to go any harder. Although the rear is very easy to check.

Edited 12/05/13 11:07 AM by Seaton

[God666]

Yep, I agree, the arms seem pretty stable, it seems to be the diff that is bouncing around.

Each time they were wound harder, it improved but has never gone completely. I suspect that if they only have five turns, with one more, I will be near out of adjustment.

[Mr_4.0]

I'll ask a silly question... What tyres are you using? I've seen many times a bad/poorly made tyre produce bad axle tramp.

For example, ford source the Dunlop tyre in a few different models to suit different diameter rims. Some of them made in china and some are not. I'll let you guess which ones tramp worse ..

[God666]

Tyres are Pirelli Rosso and about 50% worn.

[Mr_4.0]

Has it done it for the life of the tyres? Or just started?

I'd be double and triple checking bushes. I'd also look at going to something stiffer than "comfort" series. But not too stiff... Then you will have other issues.

[Weaponxr]

Just a FYI...

I had my suspension all replaced with super pro bushes, bilstien shocks, full camber, etc. The car handled like it was on rails for about 6 to 8 months and I didn't have any issues until a few months ago. I put the foot down a little too hard and the car axel tramped badly which was a surprise to me, another time in the wet everytime I put down the power and spun the wheels it would tramp. It was really odd to me and I had it checked out during the service last week.

Turns out after having the car up on the hoist there are two bushes in the diff that hadn't been replaced. Not sure what they are called but theres two that hold the diff in place each side of the big donut bush. The mechanic put a pry bar on the diff and showed me that the diff was moving a lot, caused by those two bushes. So now im going to book it back in and have those two replaced which also means having to drop the whole cradle again, I was a little frustrated to say the least.

The reason why I thought it would be relevant to share this info in this thread is because of watching those videos the op posted. Going by the videos it looks like the suspension itself is fine with little movement but instead the diff looks to be moving like mine is.

Have those two bushes been replace in your car? I know you said you had it all done but just as I thought all of mine were done, it turns out that those two bushes weren't in my case. Beats the f@ck out of me why you would replace the big donut bush and not the two side ones, especially the way it causes the big bush to move as much as it does.

Best of luck with it all

[God666]

Yep, all the bushes in the diff were replaced as the rear centre bush had torn and that was what prompted me to do it in the first place. They were replaced with Superpro, not the standard Ford bushes.

Re: tyres, I have tried several different tyres and it has not made a difference.

[Ralph Wiggum]

  On 12/05/2013 at 10:59 AM, Ralph Wiggum said:

fwiw, my car does exactly the same thing,LHS only and my LHS front diff mounting bush is cactus. You need new bushes and probably not comfort series

*cough*

[God666]

Yep, time for a closer look at the bushes.

[Weaponxr]

Possibly get underneath and have a look. Jack the rear wheels off the ground and use some kind of pry bar and try to move the diff, you should be able to see which bushes have movement