Hey all,
My latest woe is driveline related and it makes the car very unpleasant to drive.
It is most pronounced when cold.
To start with the clutch judders when taking off, unless an inordinate amount of slip is used.
Secondly when off the throttle, approaching an intersection, or at slow speeds (carpark etc) the whole car gets this resonant bunny hopping motion going.
Its almost like there is some play in the gearbox/clutch/driveshaft/diff.
A new clutch was fitted when I did the engine (not many kms done since then) and the gearbox has been rebuilt.
Thoughts?
Cheers
Ash
Jerky driving, "juddery" takeoffs etc.
Re: Jerky driving, "juddery" takeoffs etc.
Did you machine the flywheel?
--------------------------------------------------------------------------------
Elwood: I bet these cops got SCMODS.
Jake: SCMODS?
Elwood: State County Municipal Offender Data System.
W.S.C.C.A.
St Marys chapter.
Elwood: I bet these cops got SCMODS.
Jake: SCMODS?
Elwood: State County Municipal Offender Data System.
W.S.C.C.A.
St Marys chapter.
Re: Jerky driving, "juddery" takeoffs etc.
Check your engine mounts first, after that its gearbox and / or engine out for a good look at the clutch.
The clutch plate might have some oil on it from the rear main seal or it could have been bent when reassembling. The flywheel can become warped if the old clutch was slipping and generating a lot of heat (might now need machining).
Lets hope it's the engine mounts.
The clutch plate might have some oil on it from the rear main seal or it could have been bent when reassembling. The flywheel can become warped if the old clutch was slipping and generating a lot of heat (might now need machining).
Lets hope it's the engine mounts.
Alan
Member No.1 of the FB EK Holden Car Club of WA (Woo-hoo sweet!)
Member No.1 of the FB EK Holden Car Club of WA (Woo-hoo sweet!)
Re: Jerky driving, "juddery" takeoffs etc.
Yeah flywheel machined and in perfect condition.
I've had the inspection plate off and can't see any oil, certainly no leaks.
Engine mounts are also new.
I've had the inspection plate off and can't see any oil, certainly no leaks.
Engine mounts are also new.
Re: Jerky driving, "juddery" takeoffs etc.
Ash,
a) Check clutch free play at both pedal end (1/8”) and slave end (5/64”).
b) Foot on brake, handbrake on, bonnet open. Engage first gear and let clutch out gently (ride it somewhat) then pull clutch back in. Repeat. Have assistant stand at side of car (NOT IN FRONT!!!) and watch the engine - it it rocks excessively (or clunks) you may have busted a mounted (or had a shitty new one fail prematurely).
Cheers,
Harv.
a) Check clutch free play at both pedal end (1/8”) and slave end (5/64”).
b) Foot on brake, handbrake on, bonnet open. Engage first gear and let clutch out gently (ride it somewhat) then pull clutch back in. Repeat. Have assistant stand at side of car (NOT IN FRONT!!!) and watch the engine - it it rocks excessively (or clunks) you may have busted a mounted (or had a shitty new one fail prematurely).
Cheers,
Harv.
327 Chev EK wagon, original EK ute for Number 1 Daughter, an FB sedan meth monster project and a BB/MD grey motored FED.
Re: Jerky driving, "juddery" takeoffs etc.
Check ya unis mate ...........Fingers
Don’t you find it Funny that after Monday(M) and Tuesday(T), the rest of the week says WTF?
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Re: Jerky driving, "juddery" takeoffs etc.
I had the same problem years ago and went thru the usual oil on clutch, rear main, engine mounts, etc with no luck.
Mine was ok in forward gears but shocking in reverse.
All of my problem was down to driveline slop and I ended up doing a fair bit to get rid of it i.e.
Uni's
Rebuilt gearbox incl replacing all gears with excessive backlash
Overhaul diff to reduce crownwheel to pinion backlash (replaced planetary gears as they were shot and this was the worst area found)
Reset rear springs and fit helper spring to stiffen suspension and prevent axle windup. One common cause of diff wind up is loose "u" bolts combined with shot spring pads which all leads to the diff housing being grooved out.
I never did it but I've always been sus on the clutch plate damper springs and have wondered how a solid clutch would go. Atleast it would eliminate another possible cause.
Hope this helps somewhat.
Cheers
Mine was ok in forward gears but shocking in reverse.
All of my problem was down to driveline slop and I ended up doing a fair bit to get rid of it i.e.
Uni's
Rebuilt gearbox incl replacing all gears with excessive backlash
Overhaul diff to reduce crownwheel to pinion backlash (replaced planetary gears as they were shot and this was the worst area found)
Reset rear springs and fit helper spring to stiffen suspension and prevent axle windup. One common cause of diff wind up is loose "u" bolts combined with shot spring pads which all leads to the diff housing being grooved out.
I never did it but I've always been sus on the clutch plate damper springs and have wondered how a solid clutch would go. Atleast it would eliminate another possible cause.
Hope this helps somewhat.
Cheers