Hotrod hauler repair: Need help with 85' Ford F-150 4X4 4speed 300-6 (Trans-shifting) - Hot Rod Forum : Hotrodders Bulletin Board
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Old 03-09-2009, 11:36 PM
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Hotrod hauler repair: Need help with 85' Ford F-150 4X4 4speed 300-6 (Trans-shifting)

Good Morning.

I have a 1985 F-150 yard truck.

It is a 4 speed 4WD with the granny gear.

The transmission is likely from an older F-150.

I use this truck for plowing snow, pulling, pushing, and towing.

I purchased this truck not long ago knowing it had a intermittent transmission issue and some bad repair choices from the prior owner.

I was driving it home Sunday evening when I noticed that it was becoming difficult to put in reverse.

It seemed like the shift pattern tilted slightly.

When I got to my driveway the transmission was locked in third.

I was able to get the truck up into my driveway by putting it in 4WD low and giving it a little gas.

I have to figure out how to get it down the driveway.

I probably need to repair it where it is at. (not looking forward to that)

Initially when I got the truck there was a problem with shifting in first and second gear that I suspected was a bent shift fork or lost needle bearings.

That problem seemed to work itself out, but has come back with this new issue.

The clutch is new, so that is not the problem.

Your advice and assistance is always appreciated.

Semper Fi,
ret_Marine2003

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Old 03-10-2009, 02:41 AM
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I would wager a guess that the shift forks are worn/bent. That seems to be a common issue with them. I don't know why since that transmission was used in many trucks over many years, but I've driven several Fords where the shift forks were skrewd up and it was tough to find gears.

Definitely sounds like an internal issue.
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Old 03-10-2009, 02:56 AM
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The Trans. that you have is a heavy duty true top loading transmission. 1st and reverse are not syncronized and use a long straight engagement tooth. So 1-2 shifts are a pain I always use 2nd to start unless heavily loaded on a hill. A lot of times these trans are indestructable unless excessive grinding of 1st and reverse is done then you get a lot of metal shavings built up from this and or it is run low on lube.

Check oil level before going any farther. Low levels will cause excessive wear in the shift tower as well as gears.

Then uncover the shifter my guess would be the pivot in the shifter tower is worn or broken allowing the shifter to hit the forks incorectly or bind in the pivot. If this is the case then a replacement top cover should fix it. The cover should be removeable without pulling the trans. if it is a factory truck (should be) there will be a large removable plate in the floor of the cab that allows for this. salvage yards used to be full of these not sure after the big shredding movement last year.

HTH
Tony
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Old 03-10-2009, 03:53 AM
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I do not see a window or a port on this trans. for checking the oil.

I know it must be there, but where?

Where could I get a replacement top cover at?

Thank you.

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Old 03-10-2009, 08:27 PM
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Mrs. Ford Junkie typing - Mr traveling today - relaying via phone.

On the bottom of the transmission there will be a square drain plug. There is a plug, I believe, on the left side about 1/3 or 1/2 way up on the side of the transmission that looks the same as that bottom plug. May be on the right side - long time since I was under one. This is the fill plug where you check & fill. Put your finger in to the first knuckle and you should be able to touch oil.

You should be able to find a used top cover at a local salvage yard.

Tony
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Old 03-11-2009, 05:00 PM
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Thank you Tony

Is there an aftermarket source for a new top cover?

The price of scrap last year made my junk yard part sources a thing of the past.

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Old 03-11-2009, 08:10 PM
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Talked to Tony tonight - he doesn't know of anywhere to purchase a new one. You might get the local junkyard to do a search for it or you might be able to search the internet for it yourself.

HTH,
Mrs. Ford Junkie (aka Angela)
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Old 03-12-2009, 01:54 AM
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Thank you Angela and Tony.

I have been looking, but forgot to ask a couple of local Ford Fanatics I know.

If they do not have one I will be SOL.

Times have been tough in Michigan for about six years longer than the rest of the country and when the price of scrap shot up, junk trucks became the new gold overnight.



There is not much left to pick from.

Many of the old yards are no longer open to the public for parts sales.
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