Will the rear drums from my 84 2 wheel drive wagon interchange with the badly corroded ones on my "new" 92 Loyale 4wd?

No

2WD vs 4WD are different.

Well, it was a thought. Thanks, people Guess I'll consider the disc brake upgrade. I have read the posts in USRM, but didn't see any mention of a proportioning valve change. Anyone care to comment on that?

prop valve bump??

prop valve bump??

 

I've read that Loyales have the valve already.

I've read that Loyales have the valve already.

I guess I should re-phrase that. I understand disc/drum systems require different front-rear proportioning than disc/disc. So should one get the correct valve from the turbo car when doing the swap?

Apologies to all. I should have read the rear disc swap thread right under my last post, which covered the prop valve pretty well, although it still isn't clear as to whether a Loyale disc/drum has the same valve as a disc/disc. I believe I'll ask my new best friend at the nearest Soob dealer to compare part numbers.

It's my understanding proportioning valves are only used with rear servo type drum brakes. Loyals use non-servo brakes so there shouldn't be any proportioning valves on them.

 

Non-servo type brakes do not have the stopping power that servo type has. When the automobile manufacturers started installing disk brakes on the front, with the servo-type rear brakes, they used proportioning valves to keep the rear brakes from locking up prematurely. Later, the manufacturers redisigned the rear brakes to non-servos so they could eliminate the proportioning valve.