View Full Version : Can a Detroit Locker handle 35's on Dana 30?

September 9th, 2014, 12:26
I'm running 35 inch tires on Dana30 up front (8.25 in the rear), geared to 4.56 on the stock 27 spline with np231 tc.

I tend to do more poorly serviced fire roads, exploring in the desert, but I do some crawling as well. Going over obstacles I tend to be a creeper rather than a gunner.

I'd like to add at least a front locker to the rig, and given my druthers, I go for an OX, but at almost $1k for just the front, I'm not sure I'm willing to pony up the dough right now.

I know that many people have issues running such big tires on a lunchbox locker (i.e. blowing up the carrier in the diff), so if I don't go with a selectable, can a Detroit locker handle the torque of 35 inch tires?

Will the Detroit even engage if I am creeping instead of gunning?

September 9th, 2014, 13:41
A Detroit can handle much bigger than 35s. Yes it will engage. No comment on the rest of the D30 stuff. Somebody will show up soon to beat you with a pool noodle.

September 9th, 2014, 13:43
A Detroit is going to work just like a lunch box locker except it's not. Yes. They hold up fine. I run one in my D44 on 35's.

Olympus Off Road
September 9th, 2014, 13:58
While Im not a huge fan of Detroit's having broken two of them, sounds like a solid upgrade for you. An added plus is it is more solid than an open differential and will help keep ring and pinion deflection down.

September 9th, 2014, 14:09
I've run a Detroit in both a D35 and D44. I've broken a ton of axles on both, but never broken the Detroit.

September 9th, 2014, 14:36
I know I won't be the only one to say to look at the Yukon grizzly. Operates the same, cheaper, and can be had with a lifetime warranty

Olympus Off Road
September 9th, 2014, 15:08
Broken 44 and 60 Detroit here. Both were after axle failures.
The worst part is the parts to fix them cost more than a new locker. So in the scrap pile they go.

September 9th, 2014, 15:19
I have one in my 44. It's been around since the 90s and still going strong. I see it as a good upgrade for a 30

September 9th, 2014, 16:07
I run a used Detroit in my d30 on 33s, it's been a great upgrade. Not sure how the rest of your Dana 30 will hold up to 35s though....

September 9th, 2014, 18:14
I know I won't be the only one to say to look at the Yukon grizzly. Operates the same, cheaper, and can be had with a lifetime warranty

I keep hearing people say Yukon's are cheaper, but everywhere I look, they are virtually the same price, about $575 for either.

Is there some secret place to buy a Yukon Grizzly that I can't find?

September 9th, 2014, 18:22
It sounds like you have good driving habits, so you should be fine with a Detroit. A good idea while you're in there would be doing full circle clips on the 760x u joints if you have stock axle shafts.

September 10th, 2014, 08:09
It's not the Detroit to worry about it's the ring and pinion. I had chromos , truss, and a
Grizzly and started breaking ring and pinioned.

September 10th, 2014, 09:28
Been running a detroit, 4.88's, 35's & D30 on pretty rough trails for awhile without issue. Go for it, but when you're on that obsticle and you feel it bind up... ease off and try another line.

September 15th, 2014, 20:21
Detroits are pretty tough but when you have an axleshaft failure they break internally. The internal parts can't handle the shock. I had a Detroit that kept breaking after an axleshaft failure and I got tired of buying expensive replacement parts and bought a grizzly.