Anyone ever put a pinion brake on any axle besides a rock? If so what size rotor,type of caliper etc....

 

I personally have never seen it done.....
My question would be where you you hook it up at?

 

they are on the t cases some times...
like
np 200-205

 

Connected to what though?

 

a lot of times controlled by something similar to a bike brake handle. i used to know the parts to make a pinion brake for a 205. it was something like kia rotors were the exact size to fit b/t the case and yoke. and i think a single piston caliper from a chevy 1/2 ton. but they arent all that popular due to their downsides. you can easily lock up both rear wheels (assumiong only that you have a good locker like a detroit or lincoln) and get yourself in a nasty situation quick!

i wouldnt personally advise it but they do make good park brakes (again with the locker deal)

-cutts-

 

ok... i wasnt how it connected... between the pinion and the case makes since...
For some reason i had some kind of adapter that went between the driveshaft and the pinion.....
Thanks for clearing that up...

 

so what exactly are the disadvantages?

 

locking up of the tires VERY QUICKLY....
They are usually very touchy.

 

right, but if your running 40'' plus tires on the street I would think pinion brake maybe a viable option?

 

Doesnt matter if its a 50" tire or a 20" tire... they are very touchy... And can easily lock up the wheels....

If your plan on using the truck on road, go for some big disc's.....

 

1) very touchy
2) a very reliable locker is required
3) your driveline beyond the brake MUST be BEEF (gears, locker, axleshafts, ujoints, driveshafts, etc)!
4) did i mention touchy?

-cutts-

 

i could see off road
one foot on gas
one on clutch
very steep...
out of limbs..

 

Its easy to make your own set up if you have a two piece driveshaft. you just have to make a crossmember to mount it to, and match a small caliper to a small rotor

they are great for parking brakes

 

Typically these set-ups are used for parking brakes, or hill brakes. This would permit the user to apply the brakes by hand, and not requireing three feet.
We have overlooked the biggest problem with pinion brakes, or any driveline brake, and that the gear reduction is done after the brake rotor. This means that the driveshaft is turning at considerably more revolutions than the axles.
IE: if 5.38 gears are being used, the driveline spins 5.38 turns to one revolution of the axle.
It is difficult enough to stop the vehicle with two rotors, and two calipers when they are spinning at a slower speed. Multiply this by 5.38 times, or whatever the ratio is, and the caliper will burn up, and the rotor will become red hot after only a couple of stops.
Cutts mentioned a great locker or a welded (spooled) diff, because if you run an open diff, and on tire looses traction, the brakes to that axle become non-existant.
The same way power would be applied to the wheel with the least amount of traction, the same is truc for braking if braking is done via the driveline.
Many kits available for driveline brakes, (I used to run a toyota rotor and caliper on a 205) but it was not very efficient.
This would really eliminate any street use. This set-up is illegal for the above reasons anyway.

 

Yea watching trucks gone wild. you quite often see the pinion brakes glowing RED hot....
Speaking of trucks gone wild!
Well worth the investment! If mud is your kinda thing....