Landcruiser diesel clutch shudder

Submitted: Monday, Apr 26, 2004 at 09:13
ThreadID: 12380 Views:3142 Replies:2 FollowUps:4
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Just over a weekago I finished converting my HJ61 cruiser from auto to 5 speed manual. Yes, I actually was silly enough to do this myself in the garage at home, even assembly of the transfer case on the gearbox. (I had a shop assemble the gearbox for me, as I didn't have access to a bearing puller or press for the rear mainshaft bearing). I also fixed a lot of small faults/problems that I knew were there, which has turned an average cruiser into an exceptional one.

The only problem is that the clutch shudders, not so much when taking off in low gears, but more so when changing down from 4th to 3rd, and even at low speed, 35-40kph. it does shudder on the up shift 3rd to 4th, but only if the release of the clutch pedal is drawn out, as when trying to change smoothly.

I have checked engine mounts, and found one was slightly loose so tightened that, no change. Gearbox mount is ok, I checked to see if the drive shafts were binding or hydraulicing (too much grease in the slip joints, and no where for air to be release when moving in and out) not that.

I checked the net and found 80 and 100 series cruiser owners have had problem with clutch shudder, but it appears to be when the vehicle is cold, and is lower gears.

I discussed this with mate yesterday, and we were wondering if clutch shudder has become more prevalent since the exclusion of asbestos from friction material? Has anyone suffered from similar circumstances and/or can anyone shed some light on this matter?

regards,

Martin Bristow
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Reply By: Coops (Pilbara) - Monday, Apr 26, 2004 at 10:01

Monday, Apr 26, 2004 at 10:01
I've only ever experienced clutch shudder in reverse gear (80 Series)
AnswerID: 55975

Follow Up By: GO_OFFROAD - Monday, Apr 26, 2004 at 12:11

Monday, Apr 26, 2004 at 12:11
Toyota clutches can be a little prone to shudder if people take to long to let it out, or slip it, especially when cold.

Check you have no oil leaks, and you did have the flywheel machined, cleaned the surface product they keep it oxide free with, and didnt handle the clutch assembly with greasy fingers though I take it?
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FollowupID: 317853

Reply By: Member - Jiarna (SA) - Monday, Apr 26, 2004 at 10:37

Monday, Apr 26, 2004 at 10:37
Hi Martin
Have a look at post #7864. Might shed some light on the problem. Good luck.
John Wright
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AnswerID: 55985

Follow Up By: flyology - Monday, Apr 26, 2004 at 11:08

Monday, Apr 26, 2004 at 11:08
I read post 7864, and I don't think there are any problems with my gearbox input shaft, as I had a brand new one installed in the gearbox. (box I used was an HZJ box, so I needed to change the shaft to the early coarse spline) Clutch, pressure plate, and throw out bearing were all brand new, and I had the flywheel machined before it went in also. I had clean hands when I put it all together, but possibly I grabbed the disc with greasy/oily hands. Either I have done that, or maybe I have been unlucky enough to get a faulty clutch.

But what is strange is that it shudders more in higher gears, than when taking off in a low gear.....

I have four days off now, so I think I will have to pull it out and see what is going on........ but first to a clutch specialist tomorrow morning, for their opinion.

Anyone out there that is good at lifting heavy things...........

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FollowupID: 317845

Follow Up By: Member - Jiarna (SA) - Monday, Apr 26, 2004 at 11:16

Monday, Apr 26, 2004 at 11:16
Yeah bring it up here and I'll give you a hand!! LOL
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FollowupID: 317847

Follow Up By: flyology - Saturday, May 01, 2004 at 18:40

Saturday, May 01, 2004 at 18:40
Just thought you might like to know I bit the bullet and pulled the box out, and low and behold, the flywheel which I had machined by a local clutch and brake specialist was not machined square...... they tried to blame me saying I had contaminated the clutch plate with oil/grease. they did remachine it for me free of charge. However, after doing the gearbox again in such a short time I did not want to have to pull it for a third time, so I had a machinist check there work on the second job........... it was still out 12 thou. Got it fixed (remachined properly for $25- )and now it is silky smooth.

I am happy, because I was going to pay the clutch and brake place to pull the box out and check it.......I bet I would never have been told what was wrong, but would have had to pay for a new clutch, p/plate etc plus labour..... reckon I saved near a grand doing it myself.

Lucky repco replaced the clutch kit too, so the total cost was $25 for the remachining of the flywheel, plus a box of xxxxgold to show my appreciation to the fitter who stayed back and measured the flywheel up in his own time and wouldn't charge me for it.

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FollowupID: 318635

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