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Old 08-12-2003, 23:11   #1 (permalink)
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What causes diff to break?

I am a bit worried about my diff soon as 2 of my mates have blown their diffs very easily. On of my mate who owns a commodore with this gutless 186 in it blew his diff while spinning them in first then changed to second and got the revs up dumped the clutch and that was the end of that. My mate in a XF blew his diff sorta the same way but he did it in first gear they both blew theirs on the road. I think I havent blown mine cause mines an auto and I dont really try it on the road cause its rather pointless unless its wet. will my diff be safe because it doesnt really get heavy preasure put on it?? if I was to play a joke on someone and say park in front of their car and spin dirt up onto their car for 30 seconds would that just about stuff it?? They are really to expensive to bust :(

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Old 08-13-2003, 00:49   #2 (permalink)
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Re: What causes diff to break?

They are doing exactly what breaks diffs/uni's/gearboxes. They are shock loading. With an auto you have a much lesser risk of shock loading.
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Old 08-13-2003, 07:25   #3 (permalink)
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Re: What causes diff to break?

Thats very true. I agree with Walkinshaw. In auto, it is harder to break the diff as in a manual but still possible
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Old 08-14-2003, 04:15   #4 (permalink)
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yeah manuals are a lot harder on diffs than auto's unles u got a stage 3 shift kit which is really giving ur diff heaps, but that usually kills ur uni's instead
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Old 08-14-2003, 05:13   #5 (permalink)
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Re: What causes diff to break?

Yep, shock loading, tell them to learn how to get wheelspin without dumping the clutch so hard.

PS - he got wheelspin on the tarmac from a 186??? What did he do, spray baking grease on the road first???
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Old 08-14-2003, 08:31   #6 (permalink)
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Re: What causes diff to break?

EB dont laugh. My mates VH 186 bags it up nicely with a cig locked diff. Drum breaks+175's make it easy.
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Old 08-15-2003, 07:00   #7 (permalink)
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Re: What causes diff to break?

yeah it the sudden shock that they dont like. ie dumping the clutch or at the end of a burnout when the tyre grabs traction again. on gravel/dirt or in the wet its not too bad.
i hope your friends dont love there cars. if someone spun dirt onto my car for 30 secs they would be worrying about more than their diff being broken :)
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Old 08-17-2003, 04:42   #8 (permalink)
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Re: What causes diff to break?

Quote:
EB dont laugh. My mates VH 186 bags it up nicely with a cig locked diff. Drum breaks+175's make it easy.
They must be better than the 202s then, I drove a few of those for a couple of years and never got much out of them (manual)
But hey, I never really paid much attention to the old Holden 6s :)
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Old 08-17-2003, 04:51   #9 (permalink)
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dont kid yourself tho...in an auto you can stuff the diffs pretty easy as well. A mate of mine used to do burnouts in his torana by revving the crap out of it in neutral and whacking it into low - it didnt blow the diff but certainly wore it out...
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Old 08-17-2003, 06:22   #10 (permalink)
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Re: What causes diff to break?

186's are better than 202's, that's why they never raced em.

I've blown 3 diffs in my XF, all were due to 'shock loading'.

The 3 biggest killers of diffs are Axle tramping, Doing 1 wheel static burnouts at high speed, and going from dirt to bitumen while spinning the wheels.
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