GQ clutch query

Post by **TuffRR** » Sun Jul 11, 2004 9:15 pm

Howdy Nissaners.

I borrowed my brothers 4.2 diesel GQ over the weekend to go up the high country. I was pretty impressed with it although if it was mine the first thing i would do is chuck a turbo on it.
Anyway, i noticed that on a number of occasions that when i let the clutch fully out after changing down gears, the revs would drop about 200rpm even while accelerating. Is this normal or does it indicate a problem with the clutch?

Post by **buger man** » Sun Jul 11, 2004 9:21 pm

MORE INFOMATION PLEASE

Post by **TuffRR** » Sun Jul 11, 2004 9:58 pm

Ok, say changing from third to fourth, when the clutch is fully let out the revs might be around 2000rpm but straight afterwards the revs will slowly drop down to maybe 1800-1900rpm even with the accelerator depressed. This did not seem to happen all the time, i noticed it maybe half a dozen times over the weekend.

Post by **bazzle** » Mon Jul 12, 2004 6:51 am

Sounds like it is slipping a bit before fully engageing..

Bazzle

Post by **TuffRR** » Tue Jul 13, 2004 9:04 am

If it was slipping, wouldn't this cause the engine revs to increase without any corresponding increase in drive to the wheels and not the other way around?[/u]

Post by **chimpboy** » Tue Jul 13, 2004 9:54 am

TuffRR wrote:If it was slipping, wouldn't this cause the engine revs to increase without any corresponding increase in drive to the wheels and not the other way around?[/u]

That can happen too, but it's not the only way a clutch could slip.

Basically revs x gearing = speed. So if you're in a lower gear (ie third in your example) and you go to a higher gear, your revs have to lower in order for you to be at the same speed.

ie gear up, revs down / gear down, revs up

So what could be happening is that it is taking a second for the gearbox to pull the engine revs down to the right speed, as the clutch isn't fully engaging.

When the clutch gets worse you'll be able to push in the accelerator and have the revs climb up without the car going any faster.

Either way, if your speed isn't in direct proportion to your revs in any given gear, then your clutch is slipping. There is no other possibility (except a faulty tacho).

Jason

Post by **chimpboy** » Tue Jul 13, 2004 9:56 am

BTW this could all be because the throwout setup is gummed up with mud or whatever, not necessarily a worn friction plate.

But of course, it will LEAD to a worn plate, so it's much the same.

Jason

Post by **Josh_GQ** » Tue Jul 13, 2004 11:20 am

After my last trip to lcmp my GQ was doin the same thing, got home and washed it then it was good as new. figured it must have been mud stuck somewhere aroung the clutch levers and sh!t underneath

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GQ clutch query

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