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Diff backlash ?

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Old Aug 12, 2015 | 06:34 PM
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From: kent
Default Diff backlash ?

I seem to have a lot of play between the wheel and the prop turning,is this classed as backlash.Its really noticable in traffic when i'm pulling away,you can hear it juddering,also have a paddle clutch,which i don't think helps.The diff doesn't whine,and feels smooth other than that.Can i adjust this in situ,or do i have to remove the diff ?
cheers all
Matt
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Old Aug 12, 2015 | 06:41 PM
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Back lash is movement between the crown wheel teeth and pinion teeth. You feel it by holding the prop flang still then rocking the crown wheel to feel the movement
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Old Aug 12, 2015 | 08:49 PM
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Is it a cossie diff? If it is I would whap it out and send it to Bara Motorsport for a refurb and set up.

In a 2wd kit I would be looking for him to adjust the diff ratio to lower the gearing if possible, perhaps?
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Old Aug 12, 2015 | 08:56 PM
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Cheers chaps,
Think I will take it out like you say,but it's a bitch to get out 😕
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Old Aug 12, 2015 | 09:00 PM
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Originally Posted by mattman1234
Cheers chaps,
Think I will take it out like you say,but it's a bitch to get out 😕
Is that due to the kit construction? It's easy on a cos.

You could pick up a 2nd hand one cheap have it built and swap it out all at once and keep the other as a spare or sell on. I let mine go for Ł50 and it seemed fine.
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Old Aug 12, 2015 | 09:01 PM
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Originally Posted by mattman1234
Cheers chaps,
Think I will take it out like you say,but it's a bitch to get out ��
There cheap diffs. If it don't leak oil and still works as a lsd forget about it. If you can remove the back cover then you can adjust the back lash you adjust it by moving the side bearing adjusters in and out to move the crown wheel closer or further away from the pinion gear to increase or decrease the back lash which is how the teeth mesh between the two
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Old Aug 13, 2015 | 06:48 AM
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Make sure it's not the CV joints on the driveshafts that have some play. In my opinion that is more likely the cause than the diff.
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Old Aug 13, 2015 | 09:30 AM
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It's not the cv joints,def inside the diff,no leaks or noises ,just feels like it tramps when you pull away.the rear cover is easy to get of in situ.
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Old Aug 13, 2015 | 04:58 PM
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Mines is the same mate I have an incorrectly setup gripper diff, it's whines like a straight cut box so going to send it to gears for a rebuild.
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Old Aug 14, 2015 | 05:39 PM
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quick vid of my diff,think i was looking at the wrong backlash

Last edited by mattman1234; Aug 14, 2015 at 06:00 PM.
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Old Aug 14, 2015 | 07:12 PM
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I am getting turned on watching this...is that normal?
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Old Aug 14, 2015 | 07:37 PM
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yeah,is an strange noise,good job you can see whats happening
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Old Aug 14, 2015 | 07:55 PM
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Don't look like much to me do you have a dti? I think I have the measurement at work
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Old Aug 14, 2015 | 08:01 PM
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What is the measurement mate?
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Old Aug 14, 2015 | 08:21 PM
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The pinion and planet gears look pretty good,movement wise,not measured it yet,hardly anything i'd say,but its the planet gears that seem to have a lot of movement on their shafts,up/down/left right,
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Old Aug 14, 2015 | 10:05 PM
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Originally Posted by Adam-M
What is the measurement mate?
its in my tool box at work I'll put it up on Monday
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