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Old 11-19-2012, 02:27 PM   #1
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Plastic Throw Out Bearing-LUK Kits

So after reading a couple of threads on another forum apparently the LUK Clutch Kits are suspect due to the plastic throw out bearing. I think Jerry had an email to them inquiring about this change but I wanted to know if anyone has has any issues with them.

I need to replace my clutch (really my TOB) but I am going to do everything and just wanted to get feedback.

I found a different post for on a Suburban/Truck forum about the same issue but I was looking for confirmation.

"I've always used luk in the past with no problems to date...the last kit I bought a couple months ago for my '86 2wd with 4.3L and 3sp (same clutch setup as 465 though...12"..she lasted 145,000mi!!), and the throwout bearing had a "plastic" sleeve, but the area of contact with the pressure plate and the innards were still steel. I called them up to ask, like you, WTF, they said in testing the composite (not really plastic) sleeve held up better in testing, with less fork wear, then the steel version..I installed it, no problems so far, she's my daily driver, about 10,000mi on it thus far..holding up well...I wouldn't worry about it...the composites they have today are very well engineered.."

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Old 11-20-2012, 06:09 PM   #2
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Nobody has recently put in a new clutch with the plastic throw-out bearing sleeve?

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Old 11-21-2012, 06:46 PM   #3
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Went to the dealer and they have an OE kit with an all metal throw-out bearing so it looks like I will go that route. NOBODY USE LUK any more.
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Old 03-03-2013, 01:17 PM   #4
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That is a little premature as some engineered composites DO have more strength than steel and last longer. Just like I am sure people said the same about synthetic winch lines. I would want some proof of testing that shows they don't before I would discredit them.
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Old 03-03-2013, 02:32 PM   #5
Knows a couple things...

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The Luk throwout bearing is not plastic as some think/claim it is. It has some non-metallic content now but not in areas where steel would contribute any needed strength. Just like shocks have plastic content, their urethane bushings, not everything needs to be made from 100% steel.
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Old 03-03-2013, 07:04 PM   #6
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Replaced my clutch with a new LUK 2 weeks ago and did not see any plastic.
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Old 10-02-2014, 11:36 PM   #7
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Just received a new Luk clutch Kit Wednesday October 1, 2014 from Parts Geek and the throwout / clutch release bearing has some plastic / composite where the bearing rides on the front bearing retainer. I am in process of gathering up all the parts for a new clutch install. I expected to get a full metal clutch release bearing, hope this one holds up. Anybody know where to get a good one made of all metal?
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Old 10-03-2014, 12:05 AM   #8
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None of the plastic in the Luk TOB is structural. The clutch friction material isn't steel either.
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Old 10-03-2014, 09:52 AM   #9
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Quote:
Originally Posted by Jerry Bransford View Post
None of the plastic in the Luk TOB is structural. The clutch friction material isn't steel either.
^^^This...! I have used Luk clutches in at least three clutch jobs this past year, and all are holding up fine. The structural parts are encased in steel (the release arm pressure points), and the bearing itself is steel. The composite make up of the bearing sleeve that rides on the transmission bearing retainer is a non wear item and no issue. Here's a picture of the Luk on the right compared to an Autozone on the left.
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