The Ford Barn - View Single Post

tmodelman · 09-21-2014, 09:16 AM

Could be the band lining is now glazed up and won't hold on the drums. If run too loose or not enough foot pedal push to really hold low and reverse bands against the drums,, so that they 'lock up' and make the planet gears do the trans work, then the spinning action of the drum will glaze the new linings. Probably the brake lining is still good because it is used sparingly and with enough foot pedal pressure on and off.

Or could be the new linings were installed with bumps or gaps, the lining has to be fitted correctly, bumps and gaps will wear first, leaving the lining away from the drum.

Or the bands are standing proud of the drums, that can happen if the bands are sprung, as when installed thru the transmission opening time and time again, bending them out of shape. Before install of the linings, the band "ears" should be only 3"-4" apart, and the band a concentric clean circle to mate with the drum.

09-21-2014, 09:16 AM	#9
tmodelman Senior Member Join Date: May 2010 Posts: 580	Re: How smooth should tranmission drums be? Could be the band lining is now glazed up and won't hold on the drums. If run too loose or not enough foot pedal push to really hold low and reverse bands against the drums,, so that they 'lock up' and make the planet gears do the trans work, then the spinning action of the drum will glaze the new linings. Probably the brake lining is still good because it is used sparingly and with enough foot pedal pressure on and off. Or could be the new linings were installed with bumps or gaps, the lining has to be fitted correctly, bumps and gaps will wear first, leaving the lining away from the drum. Or the bands are standing proud of the drums, that can happen if the bands are sprung, as when installed thru the transmission opening time and time again, bending them out of shape. Before install of the linings, the band "ears" should be only 3"-4" apart, and the band a concentric clean circle to mate with the drum.