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Unread 09-11-2011, 11:42 PM   #1
jvallery
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Locker advice for Dana 30/Ford 8.8

Hi Folks,

I'm in the middle of a build and I am trying to consider the various choices for lockers. My Jeep will be mostly a daily driver/trail rig. I'm not looking to do crazy rock crawling and when a decision needs to be made that favors on/off road performance I want to err on the side of on-road.

That being said, I'm trying to determine about what I should do from a locker perspective. In the front I've got the stock Dana 30 with 3.73 gears. In the rear I've got a Ford 8.8 with the limited slip diff that came with it (3L73 are the markings).

My gut says to leave the Ford 8.8 alone and upgrade the Dana 30. It seems to work okay (although I've not actually had it on the road yet - see build thread). I don't want to spend a ton of money on an ARB/OX locker in addition to all of the drama involved in routing cables/air lines. My first thought was what about Detroit?

I can get a Detroit locker via Summit for $549 and I wouldn't need anything additional?

http://www.summitracing.com/parts/DTL-162SL60B/

Would that add enough value over top of the stock diff to justify the cost and work? Would that make my setup make my rig fairly capable on the trail? Are folks running the Ford 8.8 factory limited slip setup generally happy with the performance of it?

Just looking for general thoughts on this combo.

Thanks!
-JV

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Unread 09-11-2011, 11:53 PM   #2
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I put a lock rite lunchbox locker in the front and installed a 8.8 lsd in the rear and find it to be a good on/off road combo. The lunch box is also half the price of a selectable.

Dwayne
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Unread 09-11-2011, 11:55 PM   #3
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I would suggest locking the front first. The combo of a front locker with LSD in the rear will be very capable off road. A selectable locker will give you the best of everything for on road manners and off road traction. If you don't want to spend the money or hassle with air or other lines then go with a lunchbox in the front. I ran a Lockrite in the front with the LSD rear for about 6 months and it worked well. After wanting more traction I installed Powertrax Noslip locker in the 8.8.

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Unread 09-11-2011, 11:58 PM   #4
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Quote:
Originally Posted by 4.7stroker View Post
I put a lock rite lunchbox locker in the front and installed a 8.8 lsd in the rear and find it to be a good on/off road combo. The lunch box is also half the price of a selectable.

Dwayne
^ Ive got the same setup and I couldn't be happier!!!
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Unread 09-11-2011, 11:59 PM   #5
Joe Dillard
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Did you swap front axles or gear sets to get 3.73's in the 2.5L AX-5?
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Unread 09-12-2011, 05:42 AM   #6
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I have a Lock-Right in my D30 and Aussie in the 8.8. My rig is driven to the trails but not daily. I love the combination but for your build you might want to look at a Detroit for the rear and a lunchbox up front. Just a thought though.
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Unread 09-12-2011, 06:12 AM   #7
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Lock rite in the D30, Welded in the 8.8. AMAZING!!
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Unread 09-12-2011, 06:19 AM   #8
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My aussie in the 8.8 is almost unnoticable on the road, I just keep in mind, no accelerating around corners.

Spartan up front or any other lunchbox, if you still have the disconnect it wont do anything until you are in 4wd.
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Unread 09-12-2011, 06:23 AM   #9
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Not a big fan of a locked front, LSD in back. I had this in a CJ once. I was heading up a rock. Once the front popped up over the top of the rock the rear gave it up/went to one wheel drive and I went backwards. Kind of did a ballet move (piroet?) and ended up my spare tire was the only thing that kept me off my lid. Went home and locked the rear. May not be everyone's experience but it was mine.

I have a Detroit in the back and a Truetrac in the front. Not a DD but I do drive it 70 miles one way to where I wheel & 50 miles one way to work about a day a week in the summer. I don't notice it.
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Unread 09-12-2011, 08:48 AM   #10
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What tire size?



If you truly plan on a 6.0 SM465 Do NOT put a red cent into your dana 30. The weight and power will destroy that dana 30 every time out. The guy I wheel with the most, runs a v8 and dana 30 front. It breaks every time out...sometimes twice a trip. He will go wheeling 6-8 times a year and break 10-15 front shafts/u-joints a year.

We wheel the same obstacles, the same way. I left mine open intentionally, he locked his. I ran 35's he only ran 33's. He also ran limited slip in his rear Dana 44 so this is apples to apples of what you want to do.

In my experience if you run a V8 and lock the Dana30 you will hate life.

Lock the ford 8.8. When you are ready for a locked front end, throw the dana 30 in the trash.
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Unread 09-12-2011, 11:10 AM   #11
jvallery
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Quote:
Originally Posted by Joe Dillard View Post
Did you swap front axles or gear sets to get 3.73's in the 2.5L AX-5?

I haven't installed them yet but I do have the 3.73 gears. I'll install them the same time I install whatever locker I buy.



Quote:
Originally Posted by Poke View Post
What tire size?



If you truly plan on a 6.0 SM465 Do NOT put a red cent into your dana 30. The weight and power will destroy that dana 30 every time out. The guy I wheel with the most, runs a v8 and dana 30 front. It breaks every time out...sometimes twice a trip. He will go wheeling 6-8 times a year and break 10-15 front shafts/u-joints a year.

We wheel the same obstacles, the same way. I left mine open intentionally, he locked his. I ran 35's he only ran 33's. He also ran limited slip in his rear Dana 44 so this is apples to apples of what you want to do.

In my experience if you run a V8 and lock the Dana30 you will hate life.

Lock the ford 8.8. When you are ready for a locked front end, throw the dana 30 in the trash.

I'm still trying to decide on tire size. I was planning 35s but have had feedback from a few folks that indicate you can't pass inspection in Colorado with larger than 33s. I'm not sure if that is true or not. So either 33s or 35s. I am going to be running a Chevy 5.3 with SM465 transmission. They are both already purchased and the transmission is in the shop right now getting re-built and all of the Novak stuff installed.
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Unread 09-12-2011, 11:25 AM   #12
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I would stick with the 4.10 set up especially if you ever plan for 35's. As for the 8.8, 4.10 too. As far as lockers go, poke is right about the front being significantly weaker that the 8.8 so put a selectable in the rear so you have open driving with spool offroad and for the front go with something that's gonna give a little like an ected. It's LS and has a lot of give instead of breaking axles, you just lose traction and have the option to lock it up and push a little harder. I would also definitely recommend chromos up front. It's quite an investment but totally worth it.
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Unread 09-12-2011, 11:37 AM   #13
jvallery
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The trouble with the 4.10 gear is that if I'm cruising down the interstate at 75mph in 4th gear (SM465 has no overdrive) I'll be running at 3130 rpms with 33 inch tires. By switching that to the 3.73 I'll bring that down to 2848 which is still higher than I'd like but tolerable. Again, on-road versus off-road.
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Unread 09-12-2011, 12:27 PM   #14
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aussie in the front. Weld the rear or get a full case spool.
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Unread 09-12-2011, 12:47 PM   #15
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Quote:
Originally Posted by jvallery View Post
I am going to be running a Chevy 5.3 with SM465 transmission. They are both already purchased and the transmission is in the shop right now getting re-built and all of the Novak stuff installed.
5.3 and SM465.... that gives me jeep envy. good combo!
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