 One less transmission drip...drip...drip..., drip...drip...drip...drip...drip...drip...drip... |
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| McMark |
 Feb 19 2010, 10:07 PM
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#1
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914 Freak!  Group: Retired Admin Posts: 20,180 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None  |
I had a brain wave today while resealing a transmission. I've pulled out so many speedometer drives that are slathered in RTV trying to stop a leak. But that o-ring at the top of the drive almost never does a good job of sealing, even when new. Part of the reason is that the speedometer cable hangs off the end of that thing and vibrates back and forth, eventually wearing that bore into an slight oval.
It occurred to me that adding a second o-ring further down the drive body would help by adding another level of protection as well as helping to keep the drive centered in the bore, thereby helping the upper o-ring to do its job more successfully. So that's what I did, and if anyone else is interested in having this modification done, check here. (IMG:style_emoticons/default/aktion035.gif) (IMG:style_emoticons/default/aktion035.gif) Attached image(s) 
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| McMark |
Mar 9 2010, 11:28 PM
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#2
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914 Freak! Group: Retired Admin Posts: 20,180 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
I've confirmed that the seals I ordered are the correct ones. This modification is now only sold as a complete refresh of the speedo drive. Two new o-rings, a new internal seal, and a new sealing washer. All new, through and through, and better than original.
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| SirAndy |
Mar 10 2010, 11:42 AM
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#3
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Resident German Group: Admin Posts: 42,257 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(McMark @ Mar 9 2010, 09:28 PM)  I've confirmed that the seals I ordered are the correct ones. This modification is now only sold as a complete refresh of the speedo drive. Two new o-rings, a new internal seal, and a new sealing washer. All new, through and through, and better than original. (IMG:style_emoticons/default/thumb3d.gif) |
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Posts in this topic
McMark One less transmission drip...drip...drip... Feb 19 2010, 10:07 PM
sixnotfour great idea , could you have done it ahead of the b... Feb 19 2010, 10:38 PM Sleepin Very cool! Or either side of the bolt. I think... Feb 19 2010, 10:40 PM kwales Cool!
I'm still trying to remove one of t... Feb 20 2010, 10:08 AM McMark Got a slide hammer? I have a 911 speedo cable ... Feb 20 2010, 07:03 PM RobW Great idea.... now drive the transmission 50,000 m... Feb 20 2010, 08:01 PM detoxcowboy I like it, repost when you get the other seals.. Feb 21 2010, 10:24 AM
zx-niner Ordered mine and sent off a core today. Mar 10 2010, 06:28 PM Dr Evil Interesting. I just clean up the bore and use Vase... Mar 10 2010, 08:47 PM
pbanders Mine was leaking a few drops a day. I folded up a ... Mar 11 2010, 12:24 PM |
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