Clutch problems again..

91GSL-SE · 07-29-2010, 07:40 PM

So I have a 91 that has a freshly rebuilt motor (S5 NA) and a trans and driveline out of a 88 vert. It has a new slave cylander, good working master, slightly worn clutch disc and pressure plate, new pilot and throwout bearings. The first problem I ran into was that the clutch release fork had slipped off its pivot point on the transmission in the bell housing. It would go into gear just fine, but when I let off the clutch the car would hardly move. After fixing that problem I let off the clutch pedal and no movement what so ever.

I have plenty of movement in the clutch at the slave and fork, the car goes into all gears just fine, no excessive noise, all new or good working parts.

I'm stumped. Hopin for some help here guys.

Thanks in advance, Rob.

bryant · 07-29-2010, 08:13 PM

do you smell clutch any?
are you sure its full of fluid? lol just in case
if not sounds like trans or bent fork?

91GSL-SE · 07-29-2010, 09:46 PM

Quote:

Originally Posted by bryant

do you smell clutch any?
are you sure its full of fluid? lol just in case
if not sounds like trans or bent fork?

Clutch has about 2000 miles on it. Fairly new. No clutch smell. Plenty of fresh fluid. Bled the system. The fork has been replaced. Trans was just working in the vert I pulled it from.

NoDOHC · 07-29-2010, 11:39 PM

Does the clutch pedal feel spongy?
It sounds like the throwout bearing is getting hung up at the end of the stroke. Either that or the springs are all fatigued, either by heat or by age.
Either way, the clutch should feel spongy.

If it doesn't feel spongy, it is possible that it is improperly adjusted and is never releasing (if the master cylinder never goes back in far enough, the slave cylinder will never fully allow the clutch to engage).

RETed · 07-30-2010, 04:41 AM

Clutch disc installed backwards.

-Ted

***TitaniumTT*** · 07-30-2010, 06:38 AM

Ted, it's been a while since I had a stock clutch and I'm trying to remember what it looks like, but I think it would never fully disengage. Or is it a function of the disc splines not making contact with the input shaft splines?

I was thinking what NoDOHC was thinking, the clutch isn't fully engaging due to improper adjustment

91GSL-SE · 07-30-2010, 08:02 AM

Quote:

Originally Posted by NoDOHC

Does the clutch pedal feel spongy?
It sounds like the throwout bearing is getting hung up at the end of the stroke. Either that or the springs are all fatigued, either by heat or by age.
Either way, the clutch should feel spongy.

If it doesn't feel spongy, it is possible that it is improperly adjusted and is never releasing (if the master cylinder never goes back in far enough, the slave cylinder will never fully allow the clutch to engage).

I have adjusted the clutch to engage fully.
No spongy feeling at all.

91GSL-SE · 07-30-2010, 08:03 AM

Quote:

Originally Posted by RETed

Clutch disc installed backwards.

-Ted

Nope double checked that.

RETed · 07-30-2010, 08:26 AM

Quote:

Originally Posted by TitaniumTT

Ted, it's been a while since I had a stock clutch and I'm trying to remember what it looks like, but I think it would never fully disengage. Or is it a function of the disc splines not making contact with the input shaft splines?

Even though the OP says this is not the case, I'd figured I'd answer this anyways...

If you look at the clutch disc hub, it's not symmetrical on the "snout".
The hub that faces the flywheel is shorter.
If you install the clutch disc the wrong way, this hub will ride on the eshaft, causing the clutch disc to never engage and mate with the flywheel (mating surface).
You can bolt everything in and not notice anything, cause the pressure plate will just push back on the spring fingers.
The only way you can inspect this is you'd notice the clutch disc face is not resting on the flywheel when looking through one of the "inspection holes" in the pressure plate cover.

Result?
The clutch will never engage, but everything (clutch hydraulics, fork, etc.) will work just fine.

-Ted

07-29-2010, 07:40 PM	#1
91GSL-SE At the dirt track. Join Date: Jan 2010 Location: Willamette Valley, OR iTrader: (5) Posts: 89 Rep Power: 15	Clutch problems again.. So I have a 91 that has a freshly rebuilt motor (S5 NA) and a trans and driveline out of a 88 vert. It has a new slave cylander, good working master, slightly worn clutch disc and pressure plate, new pilot and throwout bearings. The first problem I ran into was that the clutch release fork had slipped off its pivot point on the transmission in the bell housing. It would go into gear just fine, but when I let off the clutch the car would hardly move. After fixing that problem I let off the clutch pedal and no movement what so ever. I have plenty of movement in the clutch at the slave and fork, the car goes into all gears just fine, no excessive noise, all new or good working parts. I'm stumped. Hopin for some help here guys. Thanks in advance, Rob. __________________ Rollin like a reuleaux. Unstoppable.

07-29-2010, 08:13 PM	#2
bryant Rotary Fan in Training Join Date: Feb 2008 Location: Montgomery, Al iTrader: (0) Posts: 31 Rep Power: 0	do you smell clutch any? are you sure its full of fluid? lol just in case if not sounds like trans or bent fork? __________________ 94T-78 (Want 500WHP)

07-29-2010, 11:39 PM	#4
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin iTrader: (1) Posts: 855 Rep Power: 17	Does the clutch pedal feel spongy? It sounds like the throwout bearing is getting hung up at the end of the stroke. Either that or the springs are all fatigued, either by heat or by age. Either way, the clutch should feel spongy. If it doesn't feel spongy, it is possible that it is improperly adjusted and is never releasing (if the master cylinder never goes back in far enough, the slave cylinder will never fully allow the clutch to engage). __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)

07-30-2010, 06:38 AM	#6
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son iTrader: (4) Posts: 4,581 Rep Power: 10	Ted, it's been a while since I had a stock clutch and I'm trying to remember what it looks like, but I think it would never fully disengage. Or is it a function of the disc splines not making contact with the input shaft splines? I was thinking what NoDOHC was thinking, the clutch isn't fully engaging due to improper adjustment __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**