The Ford Barn

Benson · 07-22-2015, 07:40 PM

removed

Ron in Quincy · 07-22-2015, 09:12 PM

The original rear castle nut is a special hardened nut, 5/8-18. If a person uses a 5/8-18 butter nut and attempts to torque it to 90 pounds you will damage the threads on the axel.

Ron

Bob Bidonde · 07-23-2015, 09:15 AM

Torquing a tapered joint over 50 lbs-ft is not a good thing to do as it may cause deformation. If the axle and hub are in good condition, the shear key takes the driveline torque and the taper centers the axle. The taper only needs to be snug for a line fit.

Larry Jenkins · 07-23-2015, 03:47 PM

Then why is the original spec 100 foot pounds?

Your statement makes sense.

Larry

Ron in Quincy · 07-23-2015, 05:35 PM

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That is why I torque to 90 pounds, then tighten just enough to insert the cotter key. Drums not torqued to at least 90 pounds can cause another problem like wearing the axel key. It may take several times to get a proper drum fit. If the drum rubs the backing plate you may have to shim the axel to get proper fit, Also the service brake shoes may rub the inside of the drum. For every thing to work properly all thing have to be considered when assembling the rear drums. Also arcing the service brake shoes in each rear and front drum is important for good brakes. The mechanical brake system on the A is designed for 60 percent braking on the rear and 40 percent on the front.

Ron

07-22-2015, 07:40 PM	#1
Benson Senior Member Join Date: May 2010 Posts: 2,594	How do rear axle threads get Damaged???? removed Last edited by Benson; 07-26-2015 at 10:13 AM. Reason: spelling and grammer

07-22-2015, 09:12 PM	#2
Ron in Quincy Senior Member Join Date: May 2010 Location: Quincy, CA. Posts: 1,708	Re: How do rear axle threads get Damaged???? The original rear castle nut is a special hardened nut, 5/8-18. If a person uses a 5/8-18 butter nut and attempts to torque it to 90 pounds you will damage the threads on the axel. Ron

07-23-2015, 09:15 AM	#3
Bob Bidonde Senior Member Join Date: May 2010 Location: Long Island, NY Posts: 3,463	Re: How do rear axle threads get Damaged???? Torquing a tapered joint over 50 lbs-ft is not a good thing to do as it may cause deformation. If the axle and hub are in good condition, the shear key takes the driveline torque and the taper centers the axle. The taper only needs to be snug for a line fit. __________________ Bob Bidonde

07-23-2015, 03:47 PM	#4
Larry Jenkins BANNED Join Date: Feb 2015 Location: East Central Iowa Posts: 1,275	Re: How do rear axle threads get Damaged???? Then why is the original spec 100 foot pounds? Your statement makes sense. Larry

07-23-2015, 05:35 PM	#5
Ron in Quincy Senior Member Join Date: May 2010 Location: Quincy, CA. Posts: 1,708	Re: How do rear axle threads get Damaged???? Sponsored Links (Register now to hide all advertisements) That is why I torque to 90 pounds, then tighten just enough to insert the cotter key. Drums not torqued to at least 90 pounds can cause another problem like wearing the axel key. It may take several times to get a proper drum fit. If the drum rubs the backing plate you may have to shim the axel to get proper fit, Also the service brake shoes may rub the inside of the drum. For every thing to work properly all thing have to be considered when assembling the rear drums. Also arcing the service brake shoes in each rear and front drum is important for good brakes. The mechanical brake system on the A is designed for 60 percent braking on the rear and 40 percent on the front. Ron