Help me understand the Super 35 kit

Just noticed this. Only the backlash needs to be checked and possibly adjusted for a Super 35 install. A gear setup is not needed when keeping the same gears for a Super 35 and new carrier installation. The pinion gear is not touched and the same gear is installed onto the new carrier... check/adjust the backlash and you're done.

Thanks for the correction, Jerry. I had always thought the opposite.

However, you have prompted me to think about it and your point makes perfect sense. Assuming the same gears, the only possible difference a new carrier can impart is the horizontal location of the ring gear, and therefore the spread between the pinion gear and the ring gear. A new carrier cannot change the pinion depth.

So it makes sense that all you have to check and possibly adjust is the backlash. Thanks for enhancing my understanding.

If you install the carrier and the backlash measures in spec, you are golden. If not, you are in for half a gear setup.

For the benefit of those who may not know, as described above if the backlash measures out of spec it must be adjusted. If the backlash is too large, you move the ring gear closer to the pinion gear. If backlast is too small, you move the ring gear away from the oinion gear.

To do so, you pull the carrier and adjust the carrier shims equally on each side to move the carrier and ring gear either closer to, or farther away, from the pinion gear. Measure the backlash again, and adjust as necessary.
 
First, there are a couple situations where I don't recommend a Detroit Locker. Like if your wife/girlfriend needs to be able to drive it and they won't like anything that doesn't drive 100% normal like a car or one with a selectable locker that can be turned completely off. My wife would have freaked out driving it the first time a tire chirped and would never want to take the time to figure out how it likes to be driven. Or if you have to drive on icy roads or icy trails, I wouldn't go for a Detroit then either. No automatic locker like a Detroit or Aussie does well on slick ice.

But if it's just you as the driver and you don't have to worry about ice, I believe it's a great choice for most of us. So far as automatic lockers go, the Detroit Locker is definitely the best behaved. Detroit Lockers used to have a terrible reputation and deservedly so. The first generation Detroit Locker banged & lurched a lot, it was not very street friendly. But the second generation Detroit Locker was redesigned to get rid of 99% of its quirks. It was semi-officially renamed the Softlocker though it is still most commonly referred to as the Detroit Locker.

Once you learn how it likes to be driven, and a Detroit Locker quickly teaches you that, you will find it is very well behaved on the street 99% of the time. That 1% can be slight occasional 'lurch' or it might make a noise. The TJ I had my Detroit Locker in was my daily driver and I put at least 100 miles a day on it in my outside sales job. Whenever it would 'remind' me of its presence, like every couple days, it was a gentle one that would just make me smile. But 99% of the time, it was well behaved and no one riding with me ever noticed anything unusual.

The trick to a Detroit Locker is this... don't apply power through turns, give it neutral power. Neither accelerate nor decelerate through a turn. That neutral throttle makes it easy for the Detroit to unlock through turns so it's a complete non-issue. Give it hard gas through a turn and the tires will chirp through the turn since it doesn't unlock easily if you're giving it a lot of gas. I got in the habit of neutral throttle through turns so I didn't even have to think about it, it became second-nature. And it only took a day or two to get to the point it became second nature, it was an easy process I didn't even have to think about.

Hi,

I've been reading through threads about regearing my 2002 2.5L TJ to 4.88 or 5.13 and this post has helped a lot. I have stock axles and would like to run 33's. What would I need to upgrade axle wise and should I put Detroit Lockers in at the same time I do all of this? I live in the Southern California Desert where it is 110 degrees for several months of the year. I do not need to worry about ice. I use this jeep as a DD but only drive about 10 miles a day outside of the adventures I will take it on.

Thanks in advance!
 
Hi,

I've been reading through threads about regearing my 2002 2.5L TJ to 4.88 or 5.13 and this post has helped a lot. I have stock axles and would like to run 33's. What would I need to upgrade axle wise and should I put Detroit Lockers in at the same time I do all of this? I live in the Southern California Desert where it is 110 degrees for several months of the year. I do not need to worry about ice. I use this jeep as a DD but only drive about 10 miles a day outside of the adventures I will take it on.

Thanks in advance!

You're a good candidate for the 30 spline Detroit locker for Dana 35, as well as 5.13 gears, as well as the Revolution 30 spline Dana 35 shafts.
 
Hi,

I've been reading through threads about regearing my 2002 2.5L TJ to 4.88 or 5.13 and this post has helped a lot. I have stock axles and would like to run 33's. What would I need to upgrade axle wise and should I put Detroit Lockers in at the same time I do all of this? I live in the Southern California Desert where it is 110 degrees for several months of the year. I do not need to worry about ice. I use this jeep as a DD but only drive about 10 miles a day outside of the adventures I will take it on.

Thanks in advance!

Here are the Super 35 30-spline axle shafts you’ll need to upgrade.

Revolution Dana Super 35 axle shafts
 
Check those axles. If you have ABS, you MAY need to save your old ABS tone rings and reinstall them on your new axle shafts...this is a PITA but very doable.

I did NOT think of the ABS rings being pressed on until I looked and my new 30 spline axles did not have the rings. Then, I tried to find just the rings and they're made of unobtanium...I THINK I found the proper replacement. Won't know for sure until they arrive.
 
Hi,

I've been reading through threads about regearing my 2002 2.5L TJ to 4.88 or 5.13 and this post has helped a lot. I have stock axles and would like to run 33's. What would I need to upgrade axle wise and should I put Detroit Lockers in at the same time I do all of this? I live in the Southern California Desert where it is 110 degrees for several months of the year. I do not need to worry about ice. I use this jeep as a DD but only drive about 10 miles a day outside of the adventures I will take it on.

Thanks in advance!

I highly recommend going with a selectable locker, especially in the rear.