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Testing Clutch Drag #4755538
05/13/18 03:44 AM
05/13/18 03:44 AM
Joined: Apr 2018
Posts: 82
Azerbaijan
NICAT Offline OP
NICAT  Offline OP
Joined: Apr 2018
Posts: 82
Azerbaijan
Hi.
I sometimes have difficulty in shifting to a gear while the car is moving. Even shifting to neutral is sometime hard. But not as hard as shifting to a gear. (Not to the first gear only, but to all gears)
Some told that it can be a clutch drag. it is the cause is clutch drag, how can i test it ?
I lifted front of the car so that the front wheel can spin freely.
Then in first gear, i depressed the clutch pedal, front wheel stopped spinning.
Does this mean that there is no drag ?

I have retrofitted an adjustable slave cylinder pin and have lengthened the pin to a level, so if i do it a little bit more, the clutch will slip. Does this guarantee that there can't be any drag ?
The gearbox is, Opel's F16 5 Speed Synchronized.

Regards

Last edited by NICAT; 05/13/18 03:49 AM.
Re: Testing Clutch Drag [Re: NICAT] #4755542
05/13/18 04:23 AM
05/13/18 04:23 AM
Joined: May 2005
Posts: 10,375
ROCHESTER, NY
Char Baby Offline
Char Baby  Offline
Joined: May 2005
Posts: 10,375
ROCHESTER, NY
I don't know anything about clutches so, I bring this up as a basic and fundamental test.
How is the clutch fluid?
Again, because I don't know however what I do know is that most clutches use regular brake fluid.


"Retired"
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic LX
Re: Testing Clutch Drag [Re: NICAT] #4755586
05/13/18 06:22 AM
05/13/18 06:22 AM
Joined: May 2015
Posts: 915
Frogland / Brittany
Popsy Offline
Popsy  Offline
Joined: May 2015
Posts: 915
Frogland / Brittany
As you were told in the other thread, first be sure that the right oil is in the gearbox, then replace "clutch fluid" (generally brake fluid too) and be sure it's correctly bleeded.

These two things done, then by adjustable slave cylinder pin you mean you can adjust the travel of the pins that actuates the clutch? If yes, adjust it for the longest travel possible for the clutch not to slip (you can test that old school by putting handbrake in a slope and trying to do a fast start in 3rd gear, the engine should stall right away).

But really, first right fluid in the gearbox, cause believe me, that makes a BIG difference, even the right specification fluid between brands can make a difference.

If you listen carefully (engine off) you should be able to hear the clutch being actuated while slowly depressing the clutch pedal). Perhaps you can even adjust the pedal height and travel, it depends on cars (I don't know this specific model), but if it's possible you should have the recommended settings in the manual. Most of the time it's for car with cable actuated clutch though.


96 Barchetta, Motul 300V 5W40 | 98 Barchetta, Quartz 9000 energy 5W40
05 Forfour 95, SHU 0W40 (gf's car) | 10 Colt Ralliart, 300V 0W40
Re: Testing Clutch Drag [Re: Popsy] #4755600
05/13/18 07:01 AM
05/13/18 07:01 AM
Joined: May 2005
Posts: 10,375
ROCHESTER, NY
Char Baby Offline
Char Baby  Offline
Joined: May 2005
Posts: 10,375
ROCHESTER, NY
Yes, check for the correct gearbox fluid along with the clutch fluid.


"Retired"
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic LX
Re: Testing Clutch Drag [Re: NICAT] #4755618
05/13/18 07:42 AM
05/13/18 07:42 AM
Joined: Dec 2002
Posts: 41,173
'Stralia
Shannow Offline
Shannow  Offline
Joined: Dec 2002
Posts: 41,173
'Stralia
If the wheel stopped spinning, then if there is any drag, it should not affect drivability.

Re: Testing Clutch Drag [Re: NICAT] #4756440
05/14/18 12:50 AM
05/14/18 12:50 AM
Joined: Jul 2003
Posts: 4,812
New Zealand
Silk Online content
Silk  Online Content
Joined: Jul 2003
Posts: 4,812
New Zealand
The usual test is 2500rpm in neutral, push your foot on the clutch, wait 5 seconds and engage gear...if it won't go in then the clutch is dragging. I like to use reverse...it makes a better noise.


1987 BMW R65 - Penrite V Twin 20/50
2005 Nissan Expert - Gulf Western 10W-40
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.
Re: Testing Clutch Drag [Re: NICAT] #4756445
05/14/18 01:00 AM
05/14/18 01:00 AM
Joined: Apr 2018
Posts: 82
Azerbaijan
NICAT Offline OP
NICAT  Offline OP
Joined: Apr 2018
Posts: 82
Azerbaijan
Thanks for replies. smile


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