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| | | | Joined: Nov 2013 Posts: 33 New Guy | | New Guy Joined: Nov 2013 Posts: 33 | Here's a question for the experts. I installed a new dual reservoir MC & bled the brakes. Jacked it up & supported on jack stands. The drivers rear stopped very well, but the passenger rear didn't. Figured all I had to do was to adjust the shoes in the passenger rear a bit. It has the original 4:11 posi rear gears. One thing I did notice is that when the drivers rear tire stopped, the passenger rear wheel speed increased. Is this OK and has anyone run into this before? I realize there is a primary drive wheel, even with a posi, and I assume this is only caused by the tires being up in the air? Took the drum off & everything seems to look & function as designed. | | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | | | | | | Joined: Apr 2010 Posts: 362 Shop Shark | | Shop Shark Joined: Apr 2010 Posts: 362 | Since you have it off the ground adjust the shoes up to where they drag about the same and you should be fine. Sounds like the rear is doing its job.Larry
58 gmc 100 with 350 sbc
| | | | | Joined: Dec 2000 Posts: 3,399 Gas Pumper | | Gas Pumper Joined: Dec 2000 Posts: 3,399 | Yeah, Jim.. what I do is exactly what Larry suggested. Make the brake shoes touch the drums just enough to hear them scrape as you turn the wheel. Then get someone to hit the brakes for you and both wheels should stop about the same. | | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | If this is a 1953 rearend, I don't think that it would have a posi-traction setup. If it does, maybe there is some weird interaction going on here. I would have someone push on the brakes while you manually try to turn each rear wheel. | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
Is it a 1953 1/2 ton enclosed drive-shaft rear-end?
Did you install new brake shoes, and/or turn the drums?
| | | | | Joined: Nov 2013 Posts: 33 New Guy | | New Guy Joined: Nov 2013 Posts: 33 | As far as I know it is the original torque tube driveshaft & rear end. It is a Posi. I'm assuming that the torque forces were divided between the two wheels & when the one stopped the other sped up to carry the load. Also found that the passenger rear had a sticking wheel cylinder. That is now fixed & the brakes are AWESOME! Good to know that the suicide MC is gone & some brakes will be there even if half of the system fails. | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | There was no Posi version of the torque tube rear. Positraction became an option on 1/2 tons in '59, using a Spicer 45 axle w/3.92:1 gear. You mention in your first post that when the left wheel was stopped, the right wheel would turn faster. This is normal for an open differential, a Posi differential would not allow you to do this, it would have locked both wheels together.
Bill Burmeister
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