The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 47-55.1 '52 3800 disc brakes

dsraven · 12-29-2023, 08:59 PM

Without reading back through I assumed that you meant the 1/2 ton spindles were basically the same as the 3/4 ton except for the kingpin size and the spindle size. The backing plates are the same bolt pattern etc. It would make more sense to me to simply have a steel bushing pressed into the 3/4 axle that is already in the truck. Then install the rebushed 1/2 ton spindles. Any brake upgrade would be based on the 1/2 ton spindles then. To machine a length of steel bushing to fit the axle and roughly fit the 1/2 ton kingpin (it would need to be precision teamed as the new 1/2 ton spindle bushings would, so that could be done at the same time by yourself. Just gotta buy the reamer and guide) and then cut that bushing into 2 pieces, one for each side, has got to be cheaper and quicker than machining both 3/4 ton spindles.
Did I miss something?

12-29-2023, 08:59 PM	#15
dsraven Registered User Join Date: Nov 2010 Location: calgary alberta Posts: 7,850	Re: '52 3800 disc brakes Without reading back through I assumed that you meant the 1/2 ton spindles were basically the same as the 3/4 ton except for the kingpin size and the spindle size. The backing plates are the same bolt pattern etc. It would make more sense to me to simply have a steel bushing pressed into the 3/4 axle that is already in the truck. Then install the rebushed 1/2 ton spindles. Any brake upgrade would be based on the 1/2 ton spindles then. To machine a length of steel bushing to fit the axle and roughly fit the 1/2 ton kingpin (it would need to be precision teamed as the new 1/2 ton spindle bushings would, so that could be done at the same time by yourself. Just gotta buy the reamer and guide) and then cut that bushing into 2 pieces, one for each side, has got to be cheaper and quicker than machining both 3/4 ton spindles. Did I miss something?