Gear Shift Problems!
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Joined: Dec 2005
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Gear Shift Problems!
I have a 1970 f100 with a 3 speed on the column. I can't get it to shift into any gear while the truck is running. When it is not running it shifts into all gears with no problem. If I try to crank it with the clutch engaged it rolls forward as if I didn't have the clutch pedal pushed in. What should I look for?
Posting Guru
Joined: Jul 2003
Posts: 2,222
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From: East Central Florida
1st of all let me say WELCOME TO FTE, the nations information Truck Stop to quote John Our Moderator here at the 67-72 F Series forum Page 
John,
It sounds to me as if your clutch is not releasing correctly when you depress the pedal this would be caused by an Error in clutch linkage or clutch release mechanisms'
Things like out of adjustment, Bad, Breaking/ Tearing or failing equalizer, bad bushings at equalizer pivots, broken clutch fork, faulty throwout bearing, bad clutch cover (pressure plate), clutch driven disc rusted/ stuck to flywheel or installed backwards. . . . .These are Probably most common causes, without actually seeing & trying it myself.
FBp
Last edited by FordBoypete; Dec 6, 2006 at 07:08 PM.
Elder User
Joined: Feb 2004
Posts: 909
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From: San Luis Obispo, CA
One possibility is that the driven disk of the clutch is stuck to the clutch plate or flywheel so that the clutch acts engaged whether the pedal is up or down. This is more comon with old vehicles that have had some oil seepage from the rear engine seal and then, with time, some of the oil gets on the clutch disk and becomes glue. While disassembly is the ultimate fix one can sometimes break this weak "glue joint" by delivering a shock load through the system. Top gear in the trans will give the most "leverage". Assuming one can do this safely (I am on 15 acres, so I can do it off road), start in top gear and gently lug up to a speed where the engine is happy and capable of making torque. Then, with the clutch pedal down, get sharply on and off the gas and the disk will often break free. I have done this with a 1937 Dodge pickup and with an Allis Chalmers Model G tractor. Do not be surprised if it reglues itself the next time it sits up for a while -- time for a new clutch disk and maybe a rear engine seal. (If you are cheap, just leave the dust cover off of the bell housing.)
