Rear axle problems

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vessomitkov
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Rear axle problems

Postby vessomitkov » Mon Jan 22, 2018 10:51 am

Hello, boys. We have problem with our MK1 Capri. I will show you with some pictures
Image
Image
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Paul G
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Re: Rear axle problems

Postby Paul G » Mon Jan 22, 2018 12:20 pm

Did they fit before the car was restored? Are they the same anti tramp bars and the same axle that were on the car before it was restored?

It could be that the Atlas(Cologne) axle needs longer arms.

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Re: Rear axle problems

Postby vessomitkov » Mon Jan 22, 2018 1:34 pm

Everything is the same. Only sandblasted and painted. New rubbers mounted.The rear axle can't move ahead and we can't put the bolts from the both sides. The leafsprings are connected to the body and to the rear axle. And now can't push it ahead to put the bolts.

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Re: Rear axle problems

Postby vessomitkov » Mon Jan 22, 2018 1:44 pm

What are the steps for mouting rear suspention ? Assemble the leafsprings to the rear axle and than together to the body? We made it like that but now can't reach these two bolts.

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Re: Rear axle problems

Postby Paul G » Mon Jan 22, 2018 1:57 pm

Longshot - have you got the leaf springs on back to front?

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Andrew 2.8i
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Re: Rear axle problems

Postby Andrew 2.8i » Mon Jan 22, 2018 2:45 pm

vessomitkov wrote:What are the steps for mouting rear suspention ? Assemble the leafsprings to the rear axle and than together to the body? We made it like that but now can't reach these two bolts.

I usually put the front spring bolt in first, then the rear as there is some movement in the shackle. I attach the U-bolts after that, either way it shouldn't make much difference.
Will the holes line up better if you jack up the axle a little?

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Re: Rear axle problems

Postby Bug » Mon Jan 22, 2018 5:43 pm

Paul G wrote:Longshot - have you got the leaf springs on back to front?


Exactly what I was about to say.
Cannot think of any other variables that could affect it.

to be honest, I was more surprised that it wasn't a Timken axle

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Re: Rear axle problems

Postby vessomitkov » Mon Jan 22, 2018 7:40 pm

The leaf springs are corectly positioned. When the car is down the distance is the same. The axle must go ahead. Maybe the U bolts are the problem.

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Re: Rear axle problems

Postby Peter-S » Mon Jan 22, 2018 8:23 pm

Have you measured the leaf springs, one side is longer than the other, that is the point where the axle clamps to the springs is not in the exact middle.
Presumably your prop shaft does not meet up properly at the moment either?
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Re: Rear axle problems

Postby Andrew 2.8i » Tue Jan 23, 2018 3:32 pm

Hi All,
I''ve measured my springs, albeit singles and not multileaf as shown in the photo, and found that the distance from the centre of the mounting bolt to the centre of the u-bolt plate is 71cm on the long side and the same measurement on the shorter side is only 48cm. With that difference in mind, it looks to me as if the sprngs in the photo are fitted the correct way around.

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Re: Rear axle problems

Postby Bug » Tue Jan 23, 2018 5:45 pm

Andrew 2.8i wrote:Hi All,
I''ve measured my springs, albeit singles and not multileaf as shown in the photo, and found that the distance from the centre of the mounting bolt to the centre of the u-bolt plate is 71cm on the long side and the same measurement on the shorter side is only 48cm. With that difference in mind, it looks to me as if the sprngs in the photo are fitted the correct way around.

Andrew.


OK, so assuming they are the correct way round, maybe the axle is not located properly by the bolts through the centre of the springs.

If you take everything apart, keep all the same items and then bolt them back together, it doesn't seem feasible that it won't meet up.
Something has been physically changed somewhere.

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Re: Rear axle problems

Postby vessomitkov » Wed Jan 24, 2018 12:24 pm

Nothing new except the rubbers.

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Re: Rear axle problems

Postby Paul G » Wed Jan 24, 2018 5:25 pm

Last thing I can think of to try is to loosen the u-bolt nuts until they are only a few threads on then drop the whole car down until it's weight is entirely on axle stands with the stands under the axle tubes. Put a bit of old carpet on the axle stands so not to damage your paint. Get some helpers to push down on the back of the car to raise the axle position even more whilst getting someone else to try pulling the diff down by the propshaft (driveshaft) flange.

This might raise and rotate the axle enough to get the bolts in.

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Re: Rear axle problems

Postby mjcapri » Thu Jan 25, 2018 8:36 am

Bit of a strange one this.... :headscratch:

So the only new components are the rubbers. Some of the holes in the rubbers look like they are off-set. Are they definitely the correct bushes and are they fitted in the correct locations?

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Re: Rear axle problems

Postby Toxcity » Thu Jan 25, 2018 10:52 am

The arbs aren't the wrong way round are they?

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Re: Rear axle problems

Postby nigecapri » Thu Jan 25, 2018 10:58 am

More weight in the boot of the car!
If you reduce the internal angle of the triangle as measured at the 'Front Spring Eye - X' then the distance from that point (X) to the 'Rearmost Arm Bush - Y ' will increase as the internal angle at the 'Bush on the Front of the Arm - Z' becomes larger.
To put it another way, the distance between X and Y will increase as you lift the locating bar upwards.

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Re: Rear axle problems

Postby Bug » Thu Jan 25, 2018 5:54 pm

nigecapri wrote:More weight in the boot of the car!
If you reduce the internal angle of the triangle as measured at the 'Front Spring Eye - X' then the distance from that point (X) to the 'Rearmost Arm Bush - Y ' will increase as the internal angle at the 'Bush on the Front of the Arm - Z' becomes larger.
To put it another way, the distance between X and Y will increase as you lift the locating bar upwards.

Image



Yup, good point.
In all my calculations I was assuming (incorrectly) that the axle would just move straight up.
But the swinging nature of the rear hangers will allow the axle to move forwards too.
A photo showing the rear hangers would probably show them to be angled backwards a bit at the moment, whereas, in normal use on the road, they tend to angle forward a little. And, of course, move forwards and backwards as the loads on the moving car change.


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