Dana 30 axle failures

For all the trusses and braces and build up parts focused on the Dana 30. I am curious to hear peoples in person accounts of how they saw a Dana 30 fail. I know I've read plenty about supposed weak spots, but I have only seen axle shafts break due to u joint failure myself, never any issues with the housing.

So please share your stories of how a Dana 30 failed and be sure to include some details about tire size and how much of a beating they were taking at the time. Thanks!

Posted Jul 27, 2020, 5:01 PM UTC

25
mericanumbajuan•

if u never plan on running tires bigger then 35s a trussed d30 will last a long time. as long as u dont rock bounce your shit. 2 weeks ago my buddy running 33s completely pulled the upper an lower ball joints out and destoryed his knuckle , axle, u joint u name it lol. with that being said whether u keep a d30 or not, the way you drive is most important. it if u run it hard enough itll break. i personally just broke the LCA bracket clean off the stock d30 and i went an bought super duty one tons to swap. just remember with a d30 you can truss it an gusset the c's all day but you cant reinforce the baby ball joints.

4
azuth89•

Most of the failures I see on a d30 are the u joints. An occasional ball joint when someone comes down really hard on one tire.

Which...honestly is probably what you want. Obviously things shouldn't break if possible, but I'd rather the point of failure be the u joint than the gears or the housing.

1
robertlandrum•

On 32s. Icy. Climbing up a stream in Gore VA. Blew the U-joint out of the passenger side. Stock shaft and joint. Broken ear. Shaft and joint replaced.

On 36s. Dry. Just a regular rock obstacle. And this was a CTM U-Joint on chromoly shafts. Had to replace the shaft. The CTM survived.

1