Drive axles, cv joints, and drum brakes.

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Drive axles, cv joints, and drum brakes.

Post by Cdub on Fri Jan 31, 2014 1:02 pm

Hello, I have a 73 SB that I have been working on.
My most recent repair was the clutch throw out bearing and pressure plate. I replaced those because it left me stranded. It was slipping in higher gears so I thought it was the clutch. When it stopped it would just grind and kind of move. Well talking to someone they said check to see if the drivesaxle is spinning when I take off the passenger side does.

What do I replace or tighten?

Thanks Chris
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Re: Drive axles, cv joints, and drum brakes.

Post by Hobug on Fri Jan 31, 2014 1:40 pm

I sounds like you have a stripped drum. The splines in the drum are no longer gripping the splines on the axle. If this is the case, all you need to do is replace the drum.
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Re: Drive axles, cv joints, and drum brakes.

Post by Cdub on Sat Feb 01, 2014 9:01 am

So do I need to replace the drum only or do I replace the cv axle and if so should I replace both sides at the same time? Is it possible that the drive axle could seperate from the drum?
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Re: Drive axles, cv joints, and drum brakes.

Post by fluxcap on Sat Feb 01, 2014 10:10 am

I'm not exactly sure I understood your first post. Were you saying that when the car comes to a stop, you push the clutch pedal in, but you hear some grinding and the car still tries to lurch forward, even though the clutch pedal is pushed?   If so, sounds like you need to tighten the clutch cable, or the clutch cable is breaking/stretching. Or a weld for the clutch cable tube broke.  But those things would usually cause shifting issues in all gears, not just when sitting stopped.

Now if you are getting the grinding noise and lurching when trying to start from a dead stop, then yes, that sounds like a stripped drum.

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Re: Drive axles, cv joints, and drum brakes.

Post by Cdub on Sat Feb 01, 2014 11:14 am

Yes, when stopped it will not move.
Should I replace both drums if so should I at that time do the cv joints and drive axles?
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Re: Drive axles, cv joints, and drum brakes.

Post by Hobug on Sat Feb 01, 2014 11:42 am

Typically you only have to replace the drum that is stripped, axles rarely strip.

As you mentioned in your first post, the way to check is to pull the hubcaps off and watch the axle where it come thru the drum while someone puts it in gear and lets the clutch out. If the axle spins in the drum, but the drum doesn't turn, that's your problem.
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Re: Drive axles, cv joints, and drum brakes.

Post by mrfeather on Thu Feb 06, 2014 12:22 am

I am not sure if the drums from a standard 1970 would but if the would they would I have a pair of front and rear for sale. The rear were done Feb. 2013 and were tacking off in July the front comes with the spindles and rear have new break cables.
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Re: Drive axles, cv joints, and drum brakes.

Post by ainokeanomoa on Sun Nov 13, 2016 8:29 pm

It would be a good idea to check the torque on the good side to 250 to 300 ft lbs and a new  5mm X 48mm cotter pin. do the same on the new drum when installing. High torque is essential for both axle nuts and the correct cotter pin.
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