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Author Topic: Rear diff bushes  (Read 1132 times)

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2.5v6

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Rear diff bushes
« on: 23 May 2017, 15:51:54 »

Hi guys, MOT is soon and I know my rear diff bushes are kaput, looked on ebay for poly resin, just want to know what strength I should buy thanks

http://www.ebay.co.uk/sch/i.html?_odkw=polyurethane+resin&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR3.TRC1.A0.H0.Xpolyurethane+rubber.TRS0&_nkw=polyurethane+rubber&_sacat=0

Also have some parts for sale, last time admin deleted advert did I miss something?
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Doctor Gollum

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Re: Rear diff bushes
« Reply #1 on: 23 May 2017, 16:09:34 »

They won't fail the Mot unless the idiot jacks it by the diff :-X

I went solid with mine... together with poly donuts it made the back end solid, allowing the suspension to work properly.

Depends how you drive and want the car to feel on the road :-\
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Nick W

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Re: Rear diff bushes
« Reply #2 on: 23 May 2017, 17:39:42 »

I bought the stiffest polyurethane I could find.


The fixture I made to hold the parts together is a bit excessive, but it does make doing both mounts simultaneously much easier. Now the worst part of the job is removing all the old rubber.





and a completed mount:


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2.5v6

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Re: Rear diff bushes
« Reply #3 on: 24 May 2017, 09:41:23 »

Nice job there! will tackle mine this weekend just gotta order it 1st lol
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laney101

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Re: Rear diff bushes
« Reply #4 on: 24 May 2017, 18:50:59 »

Did it work well what were increases in nvh like


I bought the stiffest polyurethane I could find.


The fixture I made to hold the parts together is a bit excessive, but it does make doing both mounts simultaneously much easier. Now the worst part of the job is removing all the old rubber.





and a completed mount:



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Doctor Gollum

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Re: Rear diff bushes
« Reply #5 on: 24 May 2017, 18:53:09 »

Yes, and imho, irrelevant. In that order ;)
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Nick W

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Re: Rear diff bushes
« Reply #6 on: 24 May 2017, 19:04:16 »

Did it work well what were increases in nvh like



It works fine. The fixture holds everything where it should be.


NVH decreased because the the diff is now attached, not just relying on gravity.

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Vega

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Re: Rear diff bushes
« Reply #7 on: 24 May 2017, 19:49:20 »

What about sound and vibration?
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Nick W

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Re: Rear diff bushes
« Reply #8 on: 24 May 2017, 20:10:11 »

What about sound and vibration?


Answered in the previous Noise, Vibration and Harshness post.
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Vega

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Re: Rear diff bushes
« Reply #9 on: 25 May 2017, 08:08:41 »

Answered in the previous Noise, Vibration and Harshness post.

Aha okay. Not yet known with all your abbreviations. :)
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Vega

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steviet

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Re: Rear diff bushes
« Reply #11 on: 05 January 2018, 13:38:05 »

how to replace diff mounts?
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steviet

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Re: Rear diff bushes
« Reply #12 on: 05 January 2018, 13:50:30 »

How to replace diff mounts
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GastronomicKleptomaniac

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Re: Rear diff bushes
« Reply #13 on: 06 January 2018, 19:35:03 »

Now the worst part of the job is removing all the old rubber.

 Fire? Solves everything!

(And not for the first time I'm impressed with the skill in making a relatively simple mould - if I were to try I'd probably end up in Casualty...)
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Nick W

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Re: Rear diff bushes
« Reply #14 on: 06 January 2018, 20:06:10 »

Now the worst part of the job is removing all the old rubber.

 Fire? Solves everything!

(And not for the first time I'm impressed with the skill in making a relatively simple mould - if I were to try I'd probably end up in Casualty...)


ever tried to burn out a rubber bush?


No, I thought not.


I can still smell the one I tried to do, and that wasn't even this century ;D


That fixture is intended to be reusable, a one-off could easily be made from some waxed paper and duct-tape.
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Fraggles Rock

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Re: Rear diff bushes
« Reply #15 on: 06 January 2018, 20:57:09 »

How clean does the metal work need to be? Thinking to cut the bulk of the rubber off and take a file to the remnants :-\
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GastronomicKleptomaniac

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Re: Rear diff bushes
« Reply #16 on: 06 January 2018, 21:12:16 »

Now the worst part of the job is removing all the old rubber.

 Fire? Solves everything!

(And not for the first time I'm impressed with the skill in making a relatively simple mould - if I were to try I'd probably end up in Casualty...)


ever tried to burn out a rubber bush?


No, I thought not.

Not a diff bush, but the remains of a shock mount on one of those Ford based "vintage sports car" kits... My boss told me to... He regretted it when we could no longer see the other side of the yard... :D

Niw what the bloody hell were they called? Panther, maybe?
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Nick W

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Re: Rear diff bushes
« Reply #17 on: 06 January 2018, 21:31:41 »

How clean does the metal work need to be? Thinking to cut the bulk of the rubber off and take a file to the remnants :-\


You need the polyurethane to bond to the metal. So getting it to be completely clean, and shiny should be considered the minimum. I found a razor sharp scraper, followed by 80grit sanding discs to be effective, if boring.
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Fraggles Rock

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Re: Rear diff bushes
« Reply #18 on: 06 January 2018, 22:44:53 »

Fair enough ;)
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