Gearing down and Lockers on a CJ7 - Page 2 - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

Reply
 
LinkBack Thread Tools Display Modes
post #11 of (permalink) Old 04-19-2002, 01:05 AM
 
Join Date: Dec 2001
Posts: 792
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Gearing down and Lockers on a CJ7

I am gathering that you bought the jeep as a secondary rig, for off road use and some cruising with the top down. Sounds like a blast, I use my jeep for the same thing.

I would definetly say re gear first will maek a huge difference if you get big tires. I would say go with 4.10s, would be stronger and I doubt you will need the 4.56. I would do the 4.10s then If it is not low enough for you off road swap in a tera low.

You will be happy w/ 4.10, so will your top speed and gas card bill.

the difference between 3.31s and 4.10s will be enormous.

Give the lockright a chance, especially in the front. I have heard nothing but good things about them, except they make it hard to turn on slick rock. detroit is stronger, but more expensive. I think most people go to lock rights more because they can install them at home instead of paying someone to do the install and R&P set up. If you are doing gears at the same time might want to think about shelling out the extra 200 bones????????

Tony
tonyscj5 is offline  
Sponsored Links
Advertisement
 
post #12 of (permalink) Old 04-19-2002, 08:48 AM
Official Historian
 
WILL's Avatar
 
Join Date: Sep 1999
Location: Hot Springs, AR
Posts: 8,339
Thanks: 1
Thanked 5 Times in 5 Posts
 
Re: Gearing down and Lockers on a CJ7

I think you're all missing Brad's point. Regearing the transfer case will lower the gearing more than regearing the axles. And by leaving the 3.31, the gears will have more contact area and be stronger.
WILL is offline  
post #13 of (permalink) Old 04-19-2002, 09:05 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Gearing down and Lockers on a CJ7

Thanks Will, like I said, its simple, do the math. 1st gear x t-case x diff ratio.
Sponsored Links
Advertisement
 
post #14 of (permalink) Old 04-19-2002, 09:09 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Gearing down and Lockers on a CJ7

Downside to the 3.31s and a lower t-case gearset: Driveshaft woes. You're doing all your torque multiplication BEFORE the driveshaft, and the higher axle gears put more strain on the driveshafts/u-joints. So we've got more torque multiplication being asked to turn something that is HARDER to turn...hence more stress on the shafts...and more likely breakage. So the gearsets may be stronger...but the driveshafts become the weak point in the system. Lower axle gearing will reduce the stress on the shafts and make them less likely to break, while not significantly increasing the likelihood of breaking axle gears.
post #15 of (permalink) Old 04-19-2002, 09:28 AM
 
Join Date: Nov 1999
Posts: 360
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Gearing down and Lockers on a CJ7

Just as Brad said, the 4.10's and the Teralow is an Ideal setup with these axles. The extra gear vs the loss of strength by going lower than 4.1 is not a good trade off. If he's going to get it locked (best bang for the buck off road, other than airing down!) Do the 4.10 gears now and plan for the 4/1 Tera kit later.
RocknCJ is offline  
post #16 of (permalink) Old 04-19-2002, 09:31 AM
 
Join Date: Nov 1999
Posts: 360
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Gearing down and Lockers on a CJ7

BTW, he did say "moderate rock crawling" We're not talking a H8Monday rig here....[img]images/icons/tongue.gif[/img]
RocknCJ is offline  
post #17 of (permalink) Old 04-19-2002, 10:13 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Gearing down and Lockers on a CJ7

Exactly. Just for everyones info, here's what I've been running for the past 2 years doing some pretty difficult stuff in the Farmington, NM area. 33" BFGs, Dana 30 with Lockright and Model 20 with Detroit Locker, 3.31 gears and Tera Low 4:1 t-case. So far no breakage, can do 80 on the interstate (see my post from the other day) with a 258 and T-5. The approx. 54:1 crawl ratio is not perfect, and I wouldn't go bigger than 33s, but it does work OK for hard, not hardcore, crawling, and isn't a problem on the street.
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome