My 90 is crabbing!

jwhat · Jan 17, 2011

Hi,

My 90 is crabbing, I didn't notice until someone who was driving behindme pointed it out. I've since brought it to a laser alignment place and the rear axle is out. The chassis is straight, the bushes look fine, I've swapped the trailing arms and made sure they are torqued up properly.

Is there anything else I can try before I go putting shims in? They are a last resort.

tottot · Jan 17, 2011

Check both arms are the same length, you never know and has a trailing arm mount been replaced at any time, also axle mount?

sypher · Jan 17, 2011

or somone has weldeed replacement mounts on wrong !!!!

Get the tape messure out time

jwhat · Jan 18, 2011

tottot said:
Check both arms are the same length, you never know and has a trailing arm mount been replaced at any time, also axle mount?

They are the same length alright.

sypher said:
or somone has weldeed replacement mounts on wrong !!!!

Get the tape messure out time

I don't think there has been replacement mounts but sure I won't know until I check, so out with the tape measure this weekend.

Thanks for the information lads.

auto · Jan 20, 2011

If you want to check the mounts, park on a level surface and get your chalk and plumbline out.

First, drop off the hub each side, and mark a line where it falls.

Go underneath and drop the line from each mount, marking an X where the line settles.

Remove vehicle and join points up. They SHOULD make a square with a large X inside it. If the centre of that 'X' is not equal in distance to the corners of sides - then the mounts are out.

tottot · Jan 20, 2011

auto said:
If you want to check the mounts, park on a level surface and get your chalk and plumbline out.

First, drop off the hub each side, and mark a line where it falls.

Go underneath and drop the line from each mount, marking an X where the line settles.

Remove vehicle and join points up. They SHOULD make a square with a large X inside it. If the centre of that 'X' is not equal in distance to the corners of sides - then the mounts are out.

After you have done the back axle and its ok,do the front as above.

Discoandy · Jan 20, 2011

It will be crabbing if it's lifted or front springs have sagged. The only way to sort it is to fitan adjustable panhard rod.

jwhat · Jan 23, 2011

So I went out yesterday and took off the arms again, and started to measure with a plumbline where the mounts lined up. I found one of the rear trailing arm to chassis mounts (part no is stc8606 or similar) is at an angle!!! Now I don't know whether the o/s or n/s is correct.

So can anyone tell me if the mount should be straight (vertical) or at a slight angle In very crude terms like this I or \ ?

I assume straight but can't find any pictures to confirm.

tottot · Jan 23, 2011

jwhat said:
So I went out yesterday and took off the arms again, and started to measure with a plumbline where the mounts lined up. I found one of the rear trailing arm to chassis mounts (part no is stc8606 or similar) is at an angle!!! Now I don't know whether the o/s or n/s is correct.

So can anyone tell me if the mount should be straight (vertical) or at a slight angle In very crude terms like this I or \ ?

I assume straight but can't find any pictures to confirm.

That would give you the crabs allright

Should be vertlcal.Is it bent or someone put a new one on askew?

My 90 is crabbing!

jwhat

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tottot

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jwhat

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auto

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