Posting this as an inquiry about brake size and driveline length, I just purchased a 72 bronco seems to be drum brake all around, I wanna rebuild the brakes, can anyone tell me what size they were? Also wondering correct driveline length, I’m missing rear main driveline. Thank you!
No, no one can tell you that without more information.
The front brakes are 11 x 2.
The rear brakes are either 10 x 2.5, if small bearing 2780 axle.
or 11 x 1-3/4 if big bearing 3300 axle.
The bearing size can be determined by the rear axle GVWR which can be de-coded based the glovebox warranty plate. The axle is either 2780 lbs, or 3300 lbs.
You can also tell the axle capacity by looking at the housing end from underneath the Bronco. I can tell by eye, without measuring. But you will want to measure or post pics.
You will hear a LOT about brake improvement, upgrades, changeovers, swaps, etc. But it is all nonsense. 4 wheel manual drum brakes have been more than adequate to stop motor vehicles for over 100 years now. And the brakes on your Bronco are more than adequate to stop it at freeway speeds. (once!)
Can they be improved? Yes. No they need to be improved? Maybe. Do people make money based on the falsehood that they MUST be improved? Read my sig line, and judge for yourself. My 67 U13 Military stops just fine with its factory drum brakes. My 69 U15 Wagon also stops just fine with 4 wheel discs and hydroboost.
For the rear driveline, do your own investigation, and do your own shopping. Then go measure the length, consult with
@DirtDonk and then buy a brand new driveshaft from Wild Horses 4x4 in Lodi, CA.
