Re: rear brakes on \'89
I 3d what they said... No smoke or mirrors ( as we say in networking FM) to make 'em work. The basic vehicle repair manuals cover it fairly well, but if you leave 1 side intact while doing other it's not too bad. Brake spring tools are Very Handy for doing 'em and worth the $$ as you'll use 'em again.
DO NOT STEP ON THE BRAKE PEDAL WHILE THE DRUM IS OFF!
That will cause the wheel cyl to expand and (most likley) blow it's seals.
Watch primary & secondary shoes (manual should say which is which.. my feeble memory doesn't carry all the info it used to!).. but i can find the page quick in book!
If springs seem rusty, dusty and generally used up, kits are available @ most parts houses and usually not too expensvie, as are new hold down kits (those springs/pins between the shoes & backing plate).
If you're not sure what the old lining was, try not to inhale the dust (asbestos).
Normally 3 spots that take a dab (a tiny dab!!!) of lubricant to allow the shoes to slide a bit when engauging.
The P-Brake attachment to the rear lining may be a tad of a challange. Had more than one holder fly across the room never to be seen again!
Hope this helps.