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RL Heavy ShockProof in '00 996 MT with ATB Diff? #4529176
09/29/17 08:52 AM
09/29/17 08:52 AM
Joined: Oct 2013
Posts: 2
Los Angeles, CA
Glennsky Offline OP
Glennsky  Offline OP
Joined: Oct 2013
Posts: 2
Los Angeles, CA
I'm looking to quiet down some of the lightweight flywheel chatter in my '00 996 and was considering using Red Line's Heavy ShockProof gear oil.

However, Red Line's description of "Not recommended for most synchro applications due to the product's extreme slipperiness" has me second-guessing myself. Needless to say, I'm not very technically savvy and am not sure if it'll be compatible with the Wavetrac diff (or everything else that's in the transaxle). Pros/cons...any advice would be much appreciated. Thanks in advance!

Re: RL Heavy ShockProof in '00 996 MT with ATB Diff? [Re: Glennsky] #4529221
09/29/17 09:43 AM
09/29/17 09:43 AM
Joined: Sep 2015
Posts: 5,868
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 5,868
Kalifornia Kollective
Shockproof is differential and transfer case oil. It works well in most applications. I dunno about the wave trac posi. For that you'd have to call RL.

As far as flywheel chatter, that is a whole nuther subject. You been beating on the clutch some ... laugh


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: RL Heavy ShockProof in '00 996 MT with ATB Diff? [Re: Glennsky] #4529283
09/29/17 10:35 AM
09/29/17 10:35 AM
Joined: Jun 2002
Posts: 19,246
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,246
Iowegia - USA
Light weight flywheel chatter is a an issue caused by mechanical harmonics across the face of the clutch.

You don't have shock loads there, you have harmoncs.

Never understood why people use a lightweight clutch. They usually warp rather quickly.

Last edited by MolaKule; 09/29/17 10:36 AM.

Reading is fundamental; understanding is not a given ability.
Re: RL Heavy ShockProof in '00 996 MT with ATB Diff? [Re: MolaKule] #4529302
09/29/17 10:57 AM
09/29/17 10:57 AM
Joined: Oct 2013
Posts: 2
Los Angeles, CA
Glennsky Offline OP
Glennsky  Offline OP
Joined: Oct 2013
Posts: 2
Los Angeles, CA
Yup, some of the guys on the Porsche forums explained the harmonics thing of the single mass flywheel. BTW, it isn't a lightweight clutch I'm using. Rather, it's a lightweight flywheel. Very noticeable difference on the 996 when it comes to getting the revs up!

Re: RL Heavy ShockProof in '00 996 MT with ATB Diff? [Re: MolaKule] #4529554
09/29/17 04:28 PM
09/29/17 04:28 PM
Joined: Jun 2002
Posts: 19,246
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,246
Iowegia - USA
Yep, should have said:


Originally Posted By: MolaKule

Never understood why people use a clutch SYSTEM with a lightweight flywheel. They usually warp rather quickly.


Reading is fundamental; understanding is not a given ability.

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