R34 Gtt Axel Tramp!

[silverr34gtt]

Hi all

I have a 34 making 230 odd rwkw and it has started to tramp real bad in 1st and sometimes in second.

It has potenza for the street shocks iv never herd of them and imagine their from japan fitted before it was imported.

Whats an easy way to fix this problem. can i just get new shocks for my car?

[joeyjoejoejuniorshabadoo]

pineapples....

[dmr]

diff cradle bushes are probably stuffed. time for pineapples. or bananas?

[skylinecouple]

I'd have to agree. Pineapples in the squat position are the best thing to do. I have also added Unique Autosport diff bushes and have eliminated it all together. Has nothing to do with springs and shocks. I chased that crappy idea for a year before deciding to start at the diff and go from there. Lucky for me that made a huge difference and the pineapples fixed the rest.

[silverr34gtt]

Thanks for the heads up,

Wheres a good place to buy and get these mods done? and how much do you think it will cost me?

im in Melbourne eastern suburbs.

[stenve]

Dunno if there is a fulcrum suspension down south. but i just received a quote from them today and part of it was Rear diff pinion mount kit - $61.78c

Dan at elite racing does the whiteline pineapples for about $90ish i think. can also be had from ebay

[joeyjoejoejuniorshabadoo]

i got mine form centreline.... not exactly east, but they are worth the travel....

[34GeeTeeTee]

Damn, i was just about to post the same thread...Glad i looked...

Mine was tramping a bit before, but not with 250Rwkw its hopeless, its progressively getting worse i think!

With the pinapples that people are recommending, are these the alloy type ones i've seen advertised (Skylinecouple??)

What diff bushes are you guys referring too?

Silverr34gtt - Can you please PM me with the result and cost? Be much appreciated

[skylinecouple]

I have the yellow urethane ones but I have often wanted to try the alloy. From my way of thinking the pinapples are designed to change the pinion angle mostly to help the rear end squat or lose traction for your particular motorsport. The alloy ones are for locking the subframe and stop lateral or front to rear movement when cornering, stopping or accellerating. I had an idea where I could put the required pinapples in to help the car squat and the alloy ones on the other two locating points to stop lateral movement. Take my advice with the diff bushes, I have said this before, NO axle tramp.

Diff bushes are from Unique autosport and pinapples anywhere really. The sponsors here on the forums are the best place to start.

[gt-t_r34]

I have the yellow urethane ones but I have often wanted to try the alloy. From my way of thinking the pinapples are designed to change the pinion angle mostly to help the rear end squat or lose traction for your particular motorsport. The alloy ones are for locking the subframe and stop lateral or front to rear movement when cornering, stopping or accellerating. I had an idea where I could put the required pinapples in to help the car squat and the alloy ones on the other two locating points to stop lateral movement. Take my advice with the diff bushes, I have said this before, NO axle tramp.

Diff bushes are from Unique autosport and pinapples anywhere really. The sponsors here on the forums are the best place to start.

skylinecoupe are those diff bushes ur talking about the red ones that go on the 4 mounting positions?

i already have those Bee R pineapples set to traction i still have really bad axle tramp think i might give these diff bushes a try are they hard to put in? im not keen on taking the diff out again i just did that i blew my diff to pieces lol... i get the feeling it was because of axle tramp and maybe because i angled the diff with those pine apples..? if i put these diff bushes in i reckon ill change how i have the pine apples set up and just putt all four on the bottom and see how that goes..

[skylinecouple]

Yes the red ones. They merely replace the originals but are much stiffer and if you already have had diff replacement then you have been flogging the bushes every time you dropped the clutch or accelerate then decelerate. Be carefull because some mechanics are good at convincing you to only put the front ones in but only because they are too lazy to take diff out. Besides, you can do it yourself. Even if you just do the front ones I'll bet there is a difference.

[nisskid]

10% of the time it’s tyre pressures, the sidewall flexes and releases. Try pumping the tyres up and see if the axle tramp stops and/or gets less.

5% of the time it’s worn subframe bushes, since you have fitted a rear subframe alignment kit (pineapples) I suspect that isn’t the problem in your case.

25% of the time its drive shaft angle, the car is TOO LOW and the angle of the universal joints are winding up the drive shafts. If your car is lower than 345 mm centre of wheel to guard on the rear, then try raising it up.

60% of the time it’s incorrectly matched spring and shock damper rates. The rebound (extension) damping is not sufficient to control the oscillations of the springs. Standard springs with worn shocks get this problem. BRAND NEW aftermarket coil overs get this problem where the spring rate is too high for the shocks to control.

Once you have eliminated 1, 2 and 3, then your problem is #4

cheers

[skylinecouple]

This is exactly the type of nonsense I'm talking about. Start with a solid diff that has had the bushes flogged out of it over 10 or even 15 years and work your way out. Stop following the same old advice. Sydney kid is right of course but only if you have the diff tied down tight in the first place. Did the Skylines have bad axel tramp when they let the factory ? No, they didn't. So if a brand new car with soft suspension didn't why would the same car with more pwer to spin the wheels and better (stiffer) suspension have teeth rattling tramp now !

[Drift Motorsport]

D-Project Alloy Subframe Bushes :

$135 Delivered to your door (no pickup).

Easy to install yourself if you know your way around cars.

Pineapples and Squat/Antisquat work in the short term, but they will not fix or secure the shagged subframe bushes. You can still setup the subframe for squat/anti squat with the alloy bushes, but we have found that all 8 installed is the best setup.

We also have replacement subframe bushes OEM style for $199 Delivered

Diff Bushes etc are in development.

[yogi000]

Are the OEM bushes hard to remove?

do you need to take the whole sub frame out'?

[nisskid]

yes and yes

[skylinecouple]

I'm with nisskid on that one. Hope you have good mates that work for snags on buttered rolls.

[yogi000]

have you guys actually done this?

i get so much axel tramp that my doors sound like their gonna fall off and i've got the pineapples in for max squat.