Ae85 rear end movement (or front something)

[rx7guy]

Hey my ae85 had a damaged rear trailing arm bush, so I replace the lot with nolathane. Now it has something whackjob going on, I think in the rear.

It feels as if the diff moves when I lift off or accelerate on a corner. For instance the car will pull to one side, I will take the corner, feel a small lurch, then it will pull to the other side.

The new bushes were all nice and tight to put in, and visually they still seem to be fine. I cant seem to see any play with the panhard rod either when someone shakes the car.

Also seems to get axle tramp, its worst when entering my driveway which is slightly uphill. I'm not sure if its related. It is lowered with adjustables and has an adjustable panhard rod.

Does anyone have any idea what is going on? Any way it could be diff internals/axles?

[jakesae101]

sounds panhard rod ish as the panhard rod tops the sideways movement of the diff and combats axle tramp

[rx7guy]

Yeah that is kinda what im thinking. I cant seem to get it too move by hand though and it looks fine.

[frost]

to fix axle tramp you need traction brackets on the lower arms,
the side to side will be panhard rod. most likely bush is worn/cracked

[rx7guy]

Ok. Will pop it off and have a good look.

[rx7guy]

Had a look, and the hub can move in and out on both sides a little. Is that wheel bearing? It was running low on diff oil before, would that have had an effect?

Edit: Just went round the block and its sounding horrible, clunks whenever I start, stop or go over a bump and a bit of whirring too.

What's munched?

[d1 mule]

sounds like the diff man, i brought a ae85 recently with those exact symptoms, replaces the diff head and was mint

[fangsport]

to fix axle tramp you need traction brackets on the lower arms,

not always, especially if the car is close to standard height
too soft rear spring will cause tramp as well.
an offset diff due to lowering can cause it as well.
never tried those tractions brackets, but making top links adjustable worked a treat on my Levin

[rx7guy]

Ohyep. How much oil meant to be in it? Fill to the plug on the side?

[fangsport]

Ohyep. How much oil meant to be in it? Fill to the plug on the side?

level to filler bung on rear bowl

[frost]

to fix axle tramp you need traction brackets on the lower arms,

not always, especially if the car is close to standard height
too soft rear spring will cause tramp as well.
an offset diff due to lowering can cause it as well.
never tried those tractions brackets, but making top links adjustable worked a treat on my Levin

from the pics on garage dori his car is much lower then stock,
d2 come with 6kg rear springs.
he has adjustable panhard rod, so i assume he has centered his diff.
adjustable top links is a good idea too.

[fangsport]

should have also mentioned too stiff rear springs can cause tramp, although 6kg seens to be the norm for AE/TE rear, it is probably too rigid for most road applications.

[frost]

should have also mentioned too stiff rear springs can cause tramp, although 6kg seens to be the norm for AE/TE rear, it is probably too rigid for most road applications.

yeah that sounds right to me. problem with the d2 stuff is even though they have heaps of damper adjustment you never get it right no matter what you set it at. too soft is too soft and a little harder is too hard

i have 4kg trd rear and that's still too hard coming off speed humps and stuff.
way too stiff for such a light rear end on the road.

[jondee86]

Edit: Just went round the block and its sounding horrible, clunks
whenever I start, stop or go over a bump and a bit of whirring too.

What's munched?

Had a car that broke the crownwheel carrier, and it behaved like that.

Cheers... jondee86

[rx7guy]

So far i have decided the diff is still making a few noises and has slightly worn wheel bearings, but that is ok. It just was especially bad the other day it seems. The panhard rod is tight, and I think the rear end is secure.

After some more driving it now seems that if I turn the wheel and then drive straight the car pulls in the direction I turned. After time the pulling eases off. At any time if the steering wheel is straight, the car is driving straight though.

Ive had it at firestone for a wheel alignment and the guys there have checked everything is tight and set up and dont know why it is behaving like it is.

It has powersteering which I installed recent-ish, is it possible there is pressure somehow trying to turn the wheels? Have i put a valve or something in the wrong way round?