Rockwell 2 1/2 Info Thread

Alright, pulled one of my rocks off the trailer tonight and ready up on this post so I can figure out where I'm going with this. I guess to start I'm just gonna start unbolting anything I can so I can see whats inside and dump the heavy drums.
I do have a tech question here. I am trying to keep up with the brakes part to figure out what the pinion brake guys are running for rotors and calipers. I did see the post from one guy about the cavalier rotor, but other than that I only noticed that a few were running wildwood calipers. So...was the part #'s Rich was talking about for pinion breaks or wheel breaks. I know all of Scotts stuff was wheel brakes. I'd like to pick up a rotor to be able to place the front axle once its cleaned up so I can clearance for the motor. So..can somebody clarify if any of the break talk was about pinion brakes as far as part #'s and brands? Thanks guys.
 
Aggressive1 said:
Alright, pulled one of my rocks off the trailer tonight and ready up on this post so I can figure out where I'm going with this. I guess to start I'm just gonna start unbolting anything I can so I can see whats inside and dump the heavy drums.
I do have a tech question here. I am trying to keep up with the brakes part to figure out what the pinion brake guys are running for rotors and calipers. I did see the post from one guy about the cavalier rotor, but other than that I only noticed that a few were running wildwood calipers. So...was the part #'s Rich was talking about for pinion breaks or wheel breaks. I know all of Scotts stuff was wheel brakes. I'd like to pick up a rotor to be able to place the front axle once its cleaned up so I can clearance for the motor. So..can somebody clarify if any of the break talk was about pinion brakes as far as part #'s and brands? Thanks guys.
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Im runnin 90 model izusu pickup front 2wd rotors and 90 model front 4wd yota pickup callipers
 
You can use a Wilwood caliper if you want, just make sure it's shimmed/spaced to a centered position on the rotor when you hard mount it. Most are sized to work on a 1.25" rotor thickness I believe.

My new stands for busting them apart and assembling, old rockwell brake drums, some big 1/4" wall pipe I had laying around and some rectangle tubing. Put my tools in the upturned rectangle.

awww.steelworksunlimited.com_monster_garage_slides_garage40.jpg



Utah below, how about a boat v-drive?
 
Not sure how common this is among the guys running Rocks, but I saw something today that seems like a good way to run leaf springs: two spring plates, one welded to the square tube, and the other on top of the spring pack. That way, you have two holes for your center pins, and the hole pattern will be the same. Just lay some weld on it, and call it done. I've seen where people will weld a long nut to the tube, but that seems like it might not be the most durable thing in the world, because the bolts will have a tendency to flex, and you have to be extra careful of where you weld so that your spring plate on top matches up with the nuts.
 
OK Try this on for size. A friend wants to build a rear engine buggy/truck.

He has
460/302
C6
205
2 steer 2.5 tons

Q: What do we have to do to the 2.5 tons to make them go the other way. (like flipping a 9")
 
utah said:
OK Try this on for size. A friend wants to build a rear engine buggy/truck.

He has
460/302
C6
205
2 steer 2.5 tons

Q: What do we have to do to the 2.5 tons to make them go the other way. (like flipping a 9")
Click to expand...

I don't think that's gonna happen.. not easily at least..
 
Are you talking about reverse rotation? I think that depending on which pinion flange you use, it will change between regular and reverse rotation (hence when people use a steering rockwell in the back and flip it around). I'm not too sure of what you're asking though...
 
336wheeler said:
Are you talking about reverse rotation? I think that depending on which pinion flange you use, it will change between regular and reverse rotation (hence when people use a steering rockwell in the back and flip it around). I'm not too sure of what you're asking though...
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None of that matters. Whatever way you put them in, fowards, backwards, rotated chunk-they go the same direction.

To get them to spin backwards (rear engine) you have to pull out the pinion, and turn it around the other way. It requires some machining. It's been done before, seach on pirate.
 
yeah i saw the thread on pirate a while back... but my question is, youve got a flange on hte front and back of the axle, so do they rotate opposite directions? because if they both spin hte same way, and you cant just flip the chunk around, how do you go in reverse?
 
Rich said:
Thanks! Just saved me like $80...
The 'vettes with manual brakes had a 1" bore, and the power assist units were 1 1/8" ;)
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Just wondering what MC you ended up using?

I found that a 1968 Vette with Heavy Duty manual brakes used a 1 1/8" bore MC

got it from Oreilly's Brake Best part number is MC89160

Just wondering If you guys that are running pinion brakes have had any luck running the Vette MC's?

or should I take it back and look for something else?
 
I actually found that if you run a smaller master cylinder it allows you to brake like normal ie: most people hit their brakes and they immediatly lock up, mine is a 7/8's tilton with it i can hit the brakes and since it doesnt move as much fliud it brakes the jeep just like a normal car, even at 35/40 mph . . . If I pump them a second time though they lock up faster then heck, soemthing to consider if you don't want to constantly lock em up every time you hit em.
 
jrraw23 said:
I actually found that if you run a smaller master cylinder it allows you to brake like normal ie: most people hit their brakes and they immediatly lock up, mine is a 7/8's tilton with it i can hit the brakes and since it doesnt move as much fliud it brakes the jeep just like a normal car, even at 35/40 mph . . . If I pump them a second time though they lock up faster then heck, soemthing to consider if you don't want to constantly lock em up every time you hit em.
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So you are running manual brakes no power?
 
I was wondering if anyone has a repair manual or torque specs for these things, that they would mind postin up or emailing... I'm wanting to reassemble the kingpins and outers and would like to have something to go by
 
I usually go by a "mechanics" hand book - has the torque charts for coarse/fine thread and grades 3 & 8 for all sizes. Most the bolts on Rockwells are grade 8.

My picture host site lost some pictures, I'l go back and reload pic soon and edit up some of this stuff.
 
paradisePWoffrd said:
I was wondering if anyone has a repair manual or torque specs for these things, that they would mind postin up or emailing... I'm wanting to reassemble the kingpins and outers and would like to have something to go by
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The spindle bolts/nuts get what the 3/8" air ratchet will give 'em, everything else gets the impact with 5 'tat''s.
 
So for those who run pinion brakes, what's the fastest you get up to on an occasional basis? I'm just thinking of someplace like Harlan, where you camp/unload in a field 2-3 miles from the trails, and have to travel down the main road to get there...would you be able to get up to 30 mph for a couple miles?
 
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