The Ford Barn

wkuehnis · 10-04-2018, 02:01 AM

Hi,
when I drive down a very steeply street in 3th gear for more then about 10 seconds, then the 3th gear falls out into neutral.
I can hold the shift lever, then it's not a problem.

What exactly is the problem in the transmission ?

Thanks
Willi

Jacksonlll · 10-04-2018, 05:23 AM

Take the tower off and fix or clean your detents. Not a hard job.

Tom Wesenberg · 10-04-2018, 06:53 AM

If the 2-3 gear is too loose on the shaft it slides on, then it can walk out of engagement.
If the flywheel cover isn't dialed in to be within .006" or less, then the input shaft won't be in a straight line with the crankshaft, and that can make it walk out of engagement.

100IH · 10-04-2018, 05:05 PM

Tom is talking about the shims that go at the top of the flywheel housing. 2 bolts that are on top, also hold the throttle assembly. Check a parts catalogue. Search "jumping out of gear" or " align transmission".

Frank Miller · 10-05-2018, 07:28 AM

Had one once where the gear was worn and it would twist itself out. This was where the direct drive engaged.

Terry, NJ · 10-05-2018, 10:53 PM

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Wish I could post pictures! I'd post one of my old input shaft with the wear on the area where the sliding gear engages it for third gear. Compare it to a good one and you can see right away where it's worn. Boy, I had a nice transmission after I made all the improvements!. Start with the trans cover and check the detents. Better replace the springs and detents themselves (cheap). Next the shift lever. Mike the ball, should be.500. If it's almost square weld it up and forge it to a ball. (Forging toughens it) then finish it up by carefully grinding it back to a ball. Then check the fit in the shifting gates. If it's too tight, use emery cloth and roll it around till it fits loosely in the shift gates. Not too loosely or you 'll defeat the purpose of all that work. The ball should mike around .495-.500. A little over or under doesn't make too much difference, as long as it doesn't bind. It will shift like it did when it was new.
Terry

10-04-2018, 02:01 AM	#1
wkuehnis Member Join Date: Dec 2016 Location: Switzerland Posts: 59	3th gear falls out Hi, when I drive down a very steeply street in 3th gear for more then about 10 seconds, then the 3th gear falls out into neutral. I can hold the shift lever, then it's not a problem. What exactly is the problem in the transmission ? Thanks Willi

10-04-2018, 05:23 AM	#2
Jacksonlll Senior Member Join Date: Jul 2012 Location: Michigan-- Member of Oakleaf of MARC Posts: 1,686	Re: 3th gear falls out Take the tower off and fix or clean your detents. Not a hard job.

10-04-2018, 06:53 AM	#3
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: 3th gear falls out If the 2-3 gear is too loose on the shaft it slides on, then it can walk out of engagement. If the flywheel cover isn't dialed in to be within .006" or less, then the input shaft won't be in a straight line with the crankshaft, and that can make it walk out of engagement.

10-04-2018, 05:05 PM	#4
100IH Senior Member Join Date: Dec 2011 Location: SW Idaho Posts: 970	Re: 3th gear falls out Tom is talking about the shims that go at the top of the flywheel housing. 2 bolts that are on top, also hold the throttle assembly. Check a parts catalogue. Search "jumping out of gear" or " align transmission".

10-05-2018, 07:28 AM	#5
Frank Miller Senior Member Join Date: May 2010 Location: Auburn, MA Posts: 2,106	Re: 3th gear falls out Had one once where the gear was worn and it would twist itself out. This was where the direct drive engaged. __________________ “The technique of infamy is to start two lies at once and get people arguing heatedly over which is true.” ~ Ezra Pound

10-05-2018, 10:53 PM	#6
Terry, NJ Senior Member Join Date: May 2010 Location: Bucks Co, Pa Posts: 3,740	Re: 3th gear falls out Sponsored Links (Register now to hide all advertisements) Wish I could post pictures! I'd post one of my old input shaft with the wear on the area where the sliding gear engages it for third gear. Compare it to a good one and you can see right away where it's worn. Boy, I had a nice transmission after I made all the improvements!. Start with the trans cover and check the detents. Better replace the springs and detents themselves (cheap). Next the shift lever. Mike the ball, should be.500. If it's almost square weld it up and forge it to a ball. (Forging toughens it) then finish it up by carefully grinding it back to a ball. Then check the fit in the shifting gates. If it's too tight, use emery cloth and roll it around till it fits loosely in the shift gates. Not too loosely or you 'll defeat the purpose of all that work. The ball should mike around .495-.500. A little over or under doesn't make too much difference, as long as it doesn't bind. It will shift like it did when it was new. Terry