what is the biggest tire one should get on a dana 30 axle before it starts to break?

 

You can break an axle running a 30" tire if you pin your ears back and drive like a hillbilly.

You're going to get a wide variety of answers here, but if you do some real research into the matter, you'll come away with the view that it's best not to go beyond 33s with a Dana 30.

Guys here on the board run 35s all the time and many tend to have no problem with that combination, but I for one have always wanted to leave a little in reserve if you catch my drift.

So while a gusseted and trussed Dana 30 with chromo shafts would be an acceptable alternative platform for 35" rubber, were I to make that sort of financial commitment, I'd be shopping a Dana 44 instead.

Good luck.

 

35's are the popular limit. Gussets are reccommended.....A lot of members are running 35's and it will be my choice as well when the time comes. Since Mopar decided to double the cost the the front dana44, I'll be saving for a 60 before moving up from 35's way down the road.

Not to mention the others here who have gone above 35, though it might be a time bomb ticking....

 

It really depends on how you drive and where you drive. If you never leave the street and make a couple simple, cheap upgrades to the D0 you will be fine. If you go rock crawling, but your idea of a crawl is tires smoking and engine at 7k RPM until you get traction... then I would say good luck on donuts. There is no definate answer to the question.


I can tell you that many have had failure at the u-joints at the stub shafts. Most speculate that it is from the caps twisting and coming off, causing a break in the ears. I did this to mine:

 

bigblue, digging up an old thread, but I have two questions. Did this seem to remedy the problem (what size tire you running)? And how difficult was it to have those tack-welds done? I'd think you would have compromised the grease or needle bearings?

 

I tacked mine and they have held up just fine with 35s.... easy insurance

 

It depends on how much you want to spend to build up you D30. On a stock D30 your limit is 33s. On a built D30 your limit is 35s.

 

you can run 35s just fine on a stock d30... you just cant wheel retarded.... even on a built 30 you have to go easy on the skinny

 

The stock shafts will not hold up to 35s for long. You can get away with 35s on a stock D30 for a while but not forever.

 

Apples and Oranges here guys....the new Dana 30 for the JK is much beefier than the TJ's/ The limit on the TJ's was 33 inches. It had a much smaller ring and pinion. The The new Heavy Duty Dana 30 in the JK has a much larger housing, and ring and pinion gear. This is why 4.88 is a low a gear for TJ Dana 30, and 5.13 for JK Dana 30. Chrysler made them a little tougher for us. So yes 33 on a TJ, and 35's are safe on the JK's. See you at JK fest 09. I will be running 35's on my stock Dana 30 on the black and red trails without any lockers.


3 Inch BDS Lift
35x12.5x16 Yokohama Geolander AT/S
16x8 Cragar Soft 8 Black Steel Wheels
Custom front Winch Bumper from RoundStar OffRoad
Mopar Offroad Rear Bumper
Oilpan/Tranny skid Plate by Skid Row
JKS Quicker Disconnects
Skyjacker Brake line extenders
Skyjacker Adj Rear track bar
High Clearance Adj Front Lower Control Arms by RocKrawler
RocKrawler Front Lower Control Arm Mounting Bracket/Skid Plates
Warrior Products Rear Safari Doors
Plenty of ROCKRASH