they should. overall its safer. less things to go wrong, more stopping power, its the better setup.
Ok, it's obviously time for my "Disc Vs drums theory lecture" again, so here goes:
Disc brakes do not offer "more stopping power",
to believe that they do requires complete ignorance of physics.
Here is a simple truth:
Brakes do not stop your truck, they stop the wheels from turning,
the TIRES then stop the truck.
Your brakes can only perform to the limit of the braking torque
your tires can generate.
If the small drum brakes will lock-up the wheels then bigger
brakes gain you nothing.
that all being said there are a few advantages to rear drums,
the "drogue effect" of servo actuated brakes where after applying the brake you an reduce pedal effort and get the rear drums to drag slightly and this can greatly aid stability when decending a grade in slippery weather.
BUT there is also the disadvantages, drum brakes are mechanically complicated and few people understand how they actually work.
The idea that it is NOT the wheel cylinder forcing the shoes
against the inside of the drum that applies the primary force
making the brakes work is beyond the understanding of most
people.
the wheel cylinder forces the smaller front shoe against the drum, the rotation of the drum "drags" the front shoe downwards and that movement "Cams" the larger rear show into hard contact with the drum, but since the top of the rear shoe is up against the anchor pin at the top of the backing plate it can't move... and once applied the rotation of the drum is providing most of the force applying the brakes.
With discs ALL of the application energy must come from your foot.
Yes, in a panic stop situation WHEN you have sufficient weight in the truck to keep them from simply locking (or ABS) Discs can stop you slightly better.
also if really long hills, towing a heavy trailer or repeated hard braking of any kind is involved discs are beter at disappating the heat generated, but in "light pressure" application (99.9% of useage) the servo actuated drums are actually better if the primary "modulation" of the brakes is an experienced foot.
And I HAVE PERSONALLY demonstrated that an experienced
foot CAN out perform ABS under sone circumstances.
PERSONALLY? As for Discs in general I want an explorer axle setup, and it isn't REALLY the discs I want... what I want is the NON-servo (two anchor point)internal drum parking brake that works in REVERSE.
I also want the bigger axle shafts, AND the pletiful supply of cheap axle shafts. (Now you'll understand why I don't want an FX4 axle with it's
"Zebra" axle shafts)
That is the real "downfall" of servo actuated drum brakes, that the rotation that applies them in one direction makes them far weaker in the other direction.
The 2010 Ranger's parking brake is operated by a cable actuated cam mechanism built into the caliper, and trust me even though technically
the discs appear less complicated than the drums with their shoes,
springs, levers and cables at leas that stuff you can look at and mabey come to understand, on that cable actuated mechanism built into the caliper is every bit as failure prone (typically they jam in the on position) as the
"complicated" drums, the primary difference is that on the caliper the only thing you can possibly do when it fails is say "**** me!" and go buy another (expen$ive) caliper.
No mechanical solution is perfect, everything has compromises.
Chosing one solution over another when you don't really understand
ALL the issues is going to lead you to making an uninformed decision.
Yeah, discs look "cool" but aren't necissarily the best solution to the engineering issues that many don't think all the way through....
All things in the balance Discs are probably better for most people, but not for the reasons they are prone to believe, because those beliefs
are based on misconceptions.
Lecture mode off.
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