Transmission question
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Senior User
Joined: Aug 2005
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Transmission question
My 1987 F-150 4.9 C6 transmission has a problem and I was just wondering what you guys and girls thought about it. Especially when it is cold, you will fire the truck up and throw it in drive and it will sit there, wait, wait, wait, AND wait. It will eventually catch and all will be good. It never jumps out of gear or anything, just takes a while to get into gear. Once the transmission is warmed up it catches almost perfectly. It does not have this problem in Reverse, just drive. Is there anything I can check or do before I look at rebuilding...the good thing is a rebuild on this transmission is $325 with me taking it out and reinstalling it. I should mention that it has 250,000 miles on it.
Thanks,
Matt
Thanks,
Matt
Thread Starter
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Senior User
Joined: Aug 2005
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This problem started occuring over the past year and a half. It seems to progressively get worse and worse. The fluid level does drop and I keep bringing it back up to the proper level BUT I let this truck sit two weeks and there is not even a drop of transmission fluid on the ground. Thanks.
-Matt
-Matt
Junior User
Joined: Oct 2006
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From: jasper,GA
my old bronco had this same problem, took it to a ford tranny shop and the said its "morning sickness". its when the tranny is cold the clutches slip, until the temp warms up and expands the worn clutches. nothing u can do from the outside without tearing into it. just drive it till it quits all together. i drove mine for 2 years after it started before it died
Senior User
Joined: Dec 2005
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I have a 66 t-bird with the first gen c6 and it has the same problem. One mechanic told me it could be a clogged filter screen or bad valve (?) Don't know for sure though, I've been driving (as one drives a toy) it with 'morning sickness' for about 4 years. It does not leak fluid, though. The fluid leak might just be one of your problems.
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The undercarriage has some oil on it due to a leaking drain plug. I don't see any evidence of transmission fluid. To my knowledge the filter and fluid have never been changed, except for me refilling it. I'm somewhat scared to change the filter, but, what do I really have to lose? Thanks for the insight.
-Matt
-Matt
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Post Fiend
Joined: May 2004
Posts: 11,289
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From: Lakewood, Ohio
scared to change the filter!!!!! why?
never had a 20 year old trucks fluid changed, and you wonder why it is acting up.
just do it. it is not that hard or scary.
also drain convertor when you are changing the fluid.
never had a 20 year old trucks fluid changed, and you wonder why it is acting up.
just do it. it is not that hard or scary.
also drain convertor when you are changing the fluid.
Laughing Gas
Joined: Jun 2003
Posts: 1,166
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From: Chino, California
The only other place the oil can go is out the vacuum diaphragm thru the vacuum line and into the manifold where it will burn off once it reaches the combustion chamber. Check that hose where it attaches to the vacuum point and see if it is wet with oil.
Mu suspicions are your front pump is worn out. It's an easy repair.
OMG I just noticed someone has told you to change that filter screen. Of course you should, just like he said, if it is plugged up, it wont pick up the oil!! It's a piece of cake to do!
Mu suspicions are your front pump is worn out. It's an easy repair.
OMG I just noticed someone has told you to change that filter screen. Of course you should, just like he said, if it is plugged up, it wont pick up the oil!! It's a piece of cake to do!
Last edited by pops_91710; Dec 31, 2006 at 03:24 PM.
Posting Guru
Joined: Feb 2001
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From: Keweenaw Bay, MI
Change the oil & filter and put in a bottle of LubeGard red, it is a friction modifier and it works wonders. You will be good to go! I also strongly recommenc an oil cooler, that is the best insurance you can get against transmission failure. The things run very hot and 90% of failures are caused from heat.
Tuned
Joined: Dec 2006
Posts: 291
Likes: 4
From: houston,tx
there is a piston apply seal inside the trans that tends to harden with age/use. the only real fix is to freshen up the trans-sorry. $325 is a deal if it includes the convertor
have them "spruce up" the valve body for a better shift.
have them "spruce up" the valve body for a better shift.