UK care but year told, Right hand drive , correct ,for drawing swords on the fly and all that, stuff
uk 89 YJ
there is no ABS here right? my year was an option but , 89 never here. ABS.
and lacking ABS all cars do that, on gravel. all do.
or ice
or snow
or mud,gravel sand, dirt.
or wet slippery oily roads, are not your roads wet all the time?(dreary UK)<sorry !
a rear brake job is best
the best is shoes arc'd to the drums or new drums with pre arc' shoes. (I just did mine)
that means the shoes have the same arc as the drums. for prefect contact and friction.
and then brake vastly better.
in the days all brakes needed to arc on shop machine, today most are pre-arc'd for you. most of the machines were banned for asbestos, thus the tend.
you need a brake job. if braking is not as good as new.
so did you drive this for 34 years, and just now brakes poorly ? (history does matter)
or your first ever cave man (my name) brake car? (no abs)?
it may be only this
the 3 parking brake cables rusty and seized and normal service brakes rear are now crazy unbalanced. too.
my cables were stock and looked like water magnets(sponges), (no plastic covering at all ,yikes. ) $100 USD and new cables put on and now
the rear brakes can be adjusted and balanced. (star adjusters x2) in drum.
find a shop to do this, for max safety.