Tranny prob fixed.... huh?
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Junior User
Joined: May 2003
Posts: 60
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Tranny prob fixed.... huh?
83 F250 6.9 diesel. The transmission (C5 I think) was shifting really poorly. The engine would rev real high before shifting. I checked and smelled fluid level. All good. I checked all vacuum lines and linkage all good. I adjusted bands. Still same thing.
A couple of months went by and in the meantime I developed a fuel leak on the IP. Oddly enough my heater core started leaking also. So I changed the core, IP and gave her an oil change. The tranny is now shifting beautifully! No complaints of course, but I can't figure out how this problem fixed itself. Any possible explainations for this?
Sam
A couple of months went by and in the meantime I developed a fuel leak on the IP. Oddly enough my heater core started leaking also. So I changed the core, IP and gave her an oil change. The tranny is now shifting beautifully! No complaints of course, but I can't figure out how this problem fixed itself. Any possible explainations for this?
Sam
Post Fiend
Joined: Jan 2000
Posts: 5,330
Likes: 17
From: Dryden, ON, Canada
Your trans is a C6. Your shifting problem was probably related to the vacuum regulator valve on the IP. I have no experience with a non electronic engien behind these diesels, but, I know that problems with the VSV will cause just those kind of problems.