DEMON44
Low-Tech Redneck
beater_k20 said:wasnt talking about rocks, was referring to the mog axles rootbreaker clearly mentioned in the post i quoted.
..........I was adding to mikey_d05 .......which was clearly mentioned in the post I quoted
CK5
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rockwells vs 1ton gear
- Thread starter muddybuddy
- Start date
..........I was adding to mikey_d05 .......which was clearly mentioned in the post I quoted
how good are mog's? could that be done "cheap" for a dd? how do they compare to 60/14 combo?
maybe i just need to get a 70 rear that way i can up the gears some more eventually, and then all my problems would be solved
maybe i just need to get a 70 rear that way i can up the gears some more eventually, and then all my problems would be solved
mouse
1/2 ton status
Mogs have a ton of clearance, but I've heard they are not as strong as a 60/14 combo.
I have read that Mogs are stronger and it had some good proof from what I recall.
Here are a few considerations to get you started
20" Wheels - Mogs come set up for 20" wheels, so if you don't want to swap out the drums for disks you will need some big 'uns.
7.56 Gears (404) - If you're not planning to run 44's, you probably will never get the highway RPMs low enough to drive it anywhere except on a trailer unless you do the 9" setup like I posted on that Mog pic above. The alternative is adding a 50% overdrive gear somewhere in your driveline. Overheating the portals is bad news too....
Engine clearance - Portals really get close to the oilpan if you are using moderate lifts.
3 or 4-Link Suspension - Odds of getting portals to work with leaf springs are slim & none. The amount of torque from the portal setup will bend leafs in a hurry. THIS IS THE PART WHERE MOST PEOPLE GIVE UP ON THE IDEA OF USING MOGS... It's a big commitment to re-design everything to get the Mogs to work.
Axle Width - Mogs are wide, though some careful selection of wheels with LOTS of backspacing can help. You can also have the housings cut down to make them similar widths to the 1-Ton Chebby stuff.
Mogs are cool swag to be sure..... you can get a set (with factory lockers) for less than $2000. That's the cheap part.... everything that follows...ISN'T
The ground clearance under the pumpkins is insane. You'll have better clearance with 38s than the guys running D60/14BFF setups and 44's.
More info on the different Mogs:
The 421´s are also off-centered front and rear like all Mog axles.
They are narrow, to fit under a Jeep, but you have to stay with the drum brakes. It´s easy to build an adapter plate for 5-lug or 6-lug bolt pattern. If you use a 1" plate, the 15" rim fit the drum perfect. It does not look like, but the pinion is only 2,5" shorter than the 404 pinion. That is not too much.
421 axle
pro: narrow, shorter pinion, strong (but really not much stronger than 404´s)
con:very heavy, hard to get, more expencive also the parts, no disc brake and 8-lug possible(?), Pinion conversion hard to make (1 pinion bearing is in the torque tube), weaker pinion (only 2 bearings instead of 3 on the 404)
404 axle
pro: light, easy to get, easy to get parts, conversion parts like axle shafts, drive shaft conversion, brake conversion, 8 lug conversion are easy to get. More than strong enough for most applications. Most used axles are in better condition than cast axles. Easy to make a hybrid axle. Soon are also a differnent ratio available(6-1). CTIS available.
con: long pinion shaft, maybe slightly weaker
Personally i like the 9" hybrid because of its adaptability and the options it provides. IE lockers, gear ratios, etc. plus i think that it is more effective in a light truck because of the short pinion.
Here are a few considerations to get you started
20" Wheels - Mogs come set up for 20" wheels, so if you don't want to swap out the drums for disks you will need some big 'uns.
7.56 Gears (404) - If you're not planning to run 44's, you probably will never get the highway RPMs low enough to drive it anywhere except on a trailer unless you do the 9" setup like I posted on that Mog pic above. The alternative is adding a 50% overdrive gear somewhere in your driveline. Overheating the portals is bad news too....
Engine clearance - Portals really get close to the oilpan if you are using moderate lifts.
3 or 4-Link Suspension - Odds of getting portals to work with leaf springs are slim & none. The amount of torque from the portal setup will bend leafs in a hurry. THIS IS THE PART WHERE MOST PEOPLE GIVE UP ON THE IDEA OF USING MOGS... It's a big commitment to re-design everything to get the Mogs to work.
Axle Width - Mogs are wide, though some careful selection of wheels with LOTS of backspacing can help. You can also have the housings cut down to make them similar widths to the 1-Ton Chebby stuff.
Mogs are cool swag to be sure..... you can get a set (with factory lockers) for less than $2000. That's the cheap part.... everything that follows...ISN'T
The ground clearance under the pumpkins is insane. You'll have better clearance with 38s than the guys running D60/14BFF setups and 44's.
More info on the different Mogs:
The 421´s are also off-centered front and rear like all Mog axles.
They are narrow, to fit under a Jeep, but you have to stay with the drum brakes. It´s easy to build an adapter plate for 5-lug or 6-lug bolt pattern. If you use a 1" plate, the 15" rim fit the drum perfect. It does not look like, but the pinion is only 2,5" shorter than the 404 pinion. That is not too much.
421 axle
pro: narrow, shorter pinion, strong (but really not much stronger than 404´s)
con:very heavy, hard to get, more expencive also the parts, no disc brake and 8-lug possible(?), Pinion conversion hard to make (1 pinion bearing is in the torque tube), weaker pinion (only 2 bearings instead of 3 on the 404)
404 axle
pro: light, easy to get, easy to get parts, conversion parts like axle shafts, drive shaft conversion, brake conversion, 8 lug conversion are easy to get. More than strong enough for most applications. Most used axles are in better condition than cast axles. Easy to make a hybrid axle. Soon are also a differnent ratio available(6-1). CTIS available.
con: long pinion shaft, maybe slightly weaker
Personally i like the 9" hybrid because of its adaptability and the options it provides. IE lockers, gear ratios, etc. plus i think that it is more effective in a light truck because of the short pinion.
Diesel Dan
1/2 ton status
Shawn said:
The 421 comes with a OEM 18" wheel.
Gears, ours has ~8.35:1
Con: the axle has to be removed to pull the ring/pinion, our rear pinion bearings need replacing
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