Everyone says that running a 37s on Dana 30 equals bad. I was looking at Toyo tires and their 35s weigh 10 pounds more than BF Goodrich 37s. Which is worse to run on a Dana 30? Is size more important than weight or is it the other way around? I am sleeving and gusseting my axle and considering new tires since I am mad at goodyear right now, my MTR with kevlar got a sidewall puncture and goodyear wont do anything for me.

 

37" BFG are about the same size and weight as 35" toyo's. also, if sidewall strength is a must, you'll want the toyo's as they are practically bullet proof. so long as you go real easy on the gas and DO NOT lock up your front axle, you should be okay with this setup for a while. gussets are a must as without them, your axle c's will bend and, while sleeves are nice insurance to have but, if i had to choose, i personally would get new chromoly axle "shafts" first. the odds of you loosing a c-clip on a u-joint and/or breaking an axle shaft is far greater than ever bending or breaking your axle housing.

 

WOL is right on as far as locked up.

In locked up rigs we see that tire selection makes a large impact on the survival of a D30 front axle. While many feel that 35's are just fine on a D30, we see that an aggressive tire, like a 35" Krawler, almost guarantees R&P failure. We have a relatively heavy rig with a large, heavy tire and (usually) a very small pinion. That's not a good combo. I've personally seen (on the trail) three 4.88 HP 30 failures in the past 3 years. These were all on well equipped rigs with experienced, rather cautious, drivers.

As WOL has said, keep the 30 open if you want it to survive.

 

I was kinda wondering about this also. Mt 33" MTZ's are 62 pounds. I thought that was heavy.