MJ Dana 44 Rear Axle YJ Upgrade 3.54 - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 12-01-2008, 01:49 PM   #1 (permalink)
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Join Date: Apr 2002
Member # 11427
Location: Moab UT
Posts: 486
MJ Dana 44 Rear Axle YJ Upgrade 3.54

Dana 44 rear- this one from a Comanche truck (spring under)

Rust free unit from Southern California.

Located 40 miles NE of Los Angeles 100 miles from Sledgehammer!

Drum to drum 3.54 Traclock 1 emergency cable need replacing.

$300.00

also 3.73 8.8 Ford disk brake $200.00

also 4.30 Rodeo 44 disk brake $200.00


from- http://www.4x4wire.com/jeep/tech/axle/xj_dana44_02/


Dana 35 vs. Dana 44

Why another axle? As you continue to participate in more and more 4x4 events, the stock Dana 35c rear axle will become a worry point. I like to joke that I hang out with "the wrong crowd" and that they're always getting me into trouble. The truth is that my friends are into some pretty hard-core 'wheeling and I go where they lead... often into some very tough terrain. The Dana 35 has the reputation of being weak, and that's true for a few reasons. The axle shafts and gears are small, yes, but more of a problem is the axle housing. The center casting of a Dana 35 is smaller than a Dana 44 casting, and the Dana 35 axle tubes are also smaller. The weaker casting and tubes allow the whole assembly to flex, causing the axles, gears, and even carriers to break more easily.

By measure, a complete Dana 44 axle is over 30% heavier than a Dana 35... 230 lbs. vs. 175 lbs. MJ Dana 44 axle tubes measure 2.76" in diameter, necking down just a tad to 2.72" at the center differential housing. The YJ Dana 35 axle measures 2.64" in diameter, necking down quite a bit to 2.48" at the diff.


The Dana 44 axle is an extremely popular upgrade for small to mid-sized Jeeps and other 4x4s. Did you know, however, that all Dana 44 rear axles are not the same? The Dana 44 has been used in lots of vehicles, including Jeep, Dodge, Scout and Isuzu, so naturally there are differences in various axles you'll find. Among the possible differences you'll find in Dana 44 axles are: different bolt patterns, drum vs. disc brakes, axle width, spring perch type and location, and axle tube diameter and thickness, centered or offset (a little or a lot) differentials, and cast steel or aluminum housings.

The Jeep Comanche pickup (MJ) also came with an optional Dana 44 axle from '87 to '90, and is probably the best best choice for a YJ swap. It's the correct width and bolt pattern. The Comanche axle was a spring-under design. To use the MJ axle under an YJ the perches would have to be relocated to the YJ spring configuration.


Larry Long 661-645-0349
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