The Ford Barn

Jack Richard · 05-28-2011, 07:29 PM

I discovered that the speedo drive gear on the drivshaft has about 1/4" fore-aft movement. It seems to be aligned with the speedo gear when in the forward position against the snap retainer ring, but can slide easily rearward and "disengage" with the speedo gear. The thrust washer is in place, and the drive gear is inserted properly (gear end toward front). The only thing I can think would allow this movement is if the roller bearing is too short. It measures about 1 3/4" and appears to be an original Hyatt type bearing, but has no part number markings. It is about even with the front end of the race in the torque tube. Does anyone know the proper length of the original bearing? It is listed in the Ford parts book as A4645B, but does not list any dimensions.
Thanks,
Jack

05-28-2011, 07:29 PM	#1
Jack Richard Junior Member Join Date: May 2010 Location: Vancouver, WA Posts: 22	Length of front driveshaft bearing? I discovered that the speedo drive gear on the drivshaft has about 1/4" fore-aft movement. It seems to be aligned with the speedo gear when in the forward position against the snap retainer ring, but can slide easily rearward and "disengage" with the speedo gear. The thrust washer is in place, and the drive gear is inserted properly (gear end toward front). The only thing I can think would allow this movement is if the roller bearing is too short. It measures about 1 3/4" and appears to be an original Hyatt type bearing, but has no part number markings. It is about even with the front end of the race in the torque tube. Does anyone know the proper length of the original bearing? It is listed in the Ford parts book as A4645B, but does not list any dimensions. Thanks, Jack