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04-14-2004, 05:56 PM
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#1 |
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Registered User
Join Date: Jan 2004
Location: Holmen, WI
Posts: 50
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drip drip drip goes the tranny
I know one of you out there will have a simple fix for this problem. My 78 Chev (350/350TH) leaks tranny fluid where the speedo cable goes into the trans. I replaced the O-ring but it didn't make much difference. Is there a particular procedure I should be following or better brand of 0-ring ????
Thanks!! 
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Currently in and around my garage: 1978 Chevy Stepside (Elvis) 1993 Chev S10 ext cab (LittleTruck) 1998 Chev Astro Van (Wife's Hauler) 2001 Honda 1500 Valkyrie Interstate (dad's toy) 2003 Honda 1800 Gold Wing (mom's toy) |
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04-14-2004, 06:09 PM
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#2 |
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You get what you pay for
 
Join Date: Dec 1999
Location: Cherryville, NC
Posts: 4,798
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I'm guessing you replaced the o ring on the sleeve. There is a seal on the speedo gear shaft too.
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Mike 1985 Chevy C-10 |
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04-14-2004, 06:21 PM
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#3 |
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Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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I was able to buy a whole new "bullet" with inner seal and outer o-ring for just a few dollars at a transmission supply place. That ought to fix your problem unless there is a rough spot on the gear or something that eats up seals.
Slonaker |
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04-14-2004, 08:24 PM
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#4 |
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Registered User
Join Date: Jan 2004
Location: Holmen, WI
Posts: 50
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Thanks for the ideas. I'll check with the trans shop..........
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Currently in and around my garage: 1978 Chevy Stepside (Elvis) 1993 Chev S10 ext cab (LittleTruck) 1998 Chev Astro Van (Wife's Hauler) 2001 Honda 1500 Valkyrie Interstate (dad's toy) 2003 Honda 1800 Gold Wing (mom's toy) |
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04-15-2004, 01:03 PM
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#5 |
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Registered User
Join Date: Oct 2003
Location: Chesapeake, VA
Posts: 734
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Cool thread.
I've got the same problem-- minor, but annoying.
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Semper Paratus |
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04-15-2004, 02:27 PM
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#6 |
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Right turn Clyde
Join Date: Nov 2002
Location: Cincinnati, Ohio
Posts: 2,911
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I just went to the HELP section and bought an assorted O-ring pack. Put one in that fit the best and all fixed. Mine didn't have one at all in there somehow.
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1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI |
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04-15-2004, 03:25 PM
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#7 |
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BeWarE tHe eViL CrAnkTOe!
Join Date: Oct 2002
Location: Yukon, OK
Posts: 3,605
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Guys..its not an o-ring....its a gasket that looks more like a top hat that has its top cut out. Its harder plastic than an o ring also. Like 2 bux and a pita to put in....
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~Dave~ You can call me Mike, Mike Oxlong - 1986 Chevy SWB - Stock for now - 1986 Chevy Custom SWB *Stolen 6/26/05* - 1985 Chevy SWB SOLD - 1999 T/A Some mods  www.cardomain.com/id/ramairdave AIM Screenname - Jester84 |
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04-15-2004, 07:35 PM
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#8 |
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Right turn Clyde
Join Date: Nov 2002
Location: Cincinnati, Ohio
Posts: 2,911
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got any pictures of it?
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1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI |
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04-15-2004, 08:53 PM
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#9 |
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You get what you pay for
Join Date: Dec 1999
Location: Cherryville, NC
Posts: 4,798
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Here's the seal I'm talking about. This is what my 700R4 uses. I'm guessing a 350 uses something similar.
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04-15-2004, 10:35 PM
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#10 |
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BeWarE tHe eViL CrAnkTOe!
Join Date: Oct 2002
Location: Yukon, OK
Posts: 3,605
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Oh my bad guys...on the speedo mike is correct... I was thinkin about the kickdown cable.
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~Dave~ You can call me Mike, Mike Oxlong - 1986 Chevy SWB - Stock for now - 1986 Chevy Custom SWB *Stolen 6/26/05* - 1985 Chevy SWB SOLD - 1999 T/A Some mods www.cardomain.com/id/ramairdave AIM Screenname - Jester84 |
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04-16-2004, 12:44 AM
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#11 |
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Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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These are for my TH350C. They are resting on the receipt, so you can see how cheap they were ($5.90 for the pair). I'll install them one of these days.
Speedo cable bullet with seal and o-ring preinstalled (side view) and new speedo gear:  Speedo bullet (end view of seal):  Damn! This cheap little camera takes good close-ups! The bullet in the pic above is only about 3/4 inch in diameter...  Slonaker Last edited by Slonaker; 04-16-2004 at 12:47 AM. |
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