The Ford Barn

CA Victoria · 01-02-2013, 02:37 PM

The MARK USA Gears I just recieved have .005 clearance on my 1.25 main shaft. This is about .035+ more than my original gears.

This seems excessive, has anyone had any experience with these gears?

J Franklin · 01-02-2013, 03:00 PM

Seems a bit loose. The bulletins reference the spline width and dia. Page 303. It says the dia of main shaft was changed to 1.2485/ 1.249 and the gears 1.2495/ 1.2505 Ford suggested assembling by selective fit.

700rpm · 01-02-2013, 05:28 PM

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Mine (Mark USA) seemed loose to me, too, but I installed them anyway, because they are the best available on the market, and the trans is quiet and shifts beautifully. Given the amount of miles I expect this car will have in my lifetime (and probably for the foreseeable future) I don't expect there will be any problems.

01-02-2013, 02:37 PM	#1
CA Victoria Senior Member Join Date: Feb 2011 Posts: 2,216	MARK USA Gears The MARK USA Gears I just recieved have .005 clearance on my 1.25 main shaft. This is about .035+ more than my original gears. This seems excessive, has anyone had any experience with these gears? __________________ Tim Downtown, Ca

01-02-2013, 03:00 PM	#2
J Franklin Senior Member Join Date: May 2010 Location: Oregon Posts: 6,370	Re: MARK USA Gears Seems a bit loose. The bulletins reference the spline width and dia. Page 303. It says the dia of main shaft was changed to 1.2485/ 1.249 and the gears 1.2495/ 1.2505 Ford suggested assembling by selective fit.

01-02-2013, 05:28 PM	#3
700rpm Senior Member Join Date: May 2010 Location: Portland, Oregon Posts: 6,039	Re: MARK USA Gears Sponsored Links (Register now to hide all advertisements) Mine (Mark USA) seemed loose to me, too, but I installed them anyway, because they are the best available on the market, and the trans is quiet and shifts beautifully. Given the amount of miles I expect this car will have in my lifetime (and probably for the foreseeable future) I don't expect there will be any problems. __________________ Ray Horton, Portland, OR As you go through life, keep your eye on the donut, not the hole.