78 Vette Speedo Cable Bullet Issue
Thread Starter
Heel & Toe
Joined: Nov 2012
Posts: 23
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From: Greenville SC
78 Vette Speedo Cable Bullet Issue
Random question. Replaced my lower speedo cable on my 78 vette recently and within a week started to get a leak from the bullet housing on the transmission where its attached. New cable was the same length as the old. Thought it was odd so yesterday i replaced the bullet housing to make sure its old seals were not at fault. Today still a small leak. So i just went and ordered a new cable from corvette america. First one was a cheap one from advance auto. Does it sounds like i am on the right track?
Team Owner
Joined: Jan 2006
Posts: 37,637
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From: Crossville TN
You disassembled an item that had old worn seals in it. The appropriate repair would have been to change those seals while you were at it. And, you have now found out WHY we do that when repairs are made to such devices. THEY BEGIN TO LEAK if you don't finish the job.
Thread Starter
Heel & Toe
Joined: Nov 2012
Posts: 23
Likes: 0
From: Greenville SC
All is brand new now. I guess i wasnt clear in my post but i already put a completely new bullet in the transmission. Just waiting on the new speedo cable to get here. The question that was being asked was other than those two things could anything else be causing a leak from that bullet housing.
Last edited by ADHDVETTE; Jul 6, 2016 at 07:30 PM.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Nope. Something above that bullet could be leaking and making it appear like the speedo bullet had the leak. But, if the O-ring and internal lip seal are not damaged, the only other way that bullet could leak is if there was a machining or assembly error.
If the O-ring is not lubed before installation, it can 'roll' and/or cut during installation.
If the O-ring is not lubed before installation, it can 'roll' and/or cut during installation.
Last edited by 7T1vette; Jul 7, 2016 at 12:40 AM.
Melting Slicks
Joined: Oct 2000
Posts: 2,143
Likes: 195
From: Englewood FL
Random question. Replaced my lower speedo cable on my 78 vette recently and within a week started to get a leak from the bullet housing on the transmission where its attached. New cable was the same length as the old. Thought it was odd so yesterday i replaced the bullet housing to make sure its old seals were not at fault. Today still a small leak. So i just went and ordered a new cable from corvette america. First one was a cheap one from advance auto. Does it sounds like i am on the right track?
When I installed it, I put some plumber's grease around the o ring and some lithium grease around the shaft of the driven gear.
