What are the best gears for my cj5 - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > What are the best gears for my cj5

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineFS: Wrangler RGB Multicolor Fog Light LEDs: Awesome EffectSavvy Aluminum Gas Tank Skid

Reply
Unread 02-24-2013, 09:42 AM   #1
Dabney25
Registered User
 
Join Date: Feb 2013
Location: Huachuca City, arizona
Posts: 4
What are the best gears for my cj5

I am wondering what would be the best gear ratio for my 1981 cj5. Its a 4 cylinder with a 4 inch lift and 33's. It has a 5 speed transmission with a dana 300 transfer case. It currently has 3.73 gears. I would like to have a little power on the highway and be able to drive up hill faster than 40 mph. I am thinking of 4.56 or 4.88 gear ratio. Just wondering if anyone else has concurred this problem

Dabney25 is offline   Reply With Quote
Unread 02-24-2013, 10:41 AM   #2
CoryA
Registered User
1977 CJ7 
 
Join Date: Apr 2009
Location: Arizona
Posts: 772
Welcome a fellow Arizonan!

You might want to fill out your profile, I'm guessing on a lot of your drivetrain.

With an 81 you shouldn't have a t5 but I'm going to assume that's what transmission your running. It has a .86 overdrive and I'm guessing your 33's are actually measured about 32 (might want to take a tape measure to them to find out)

Here's a good calculator for cruising rpm I'm not sure what the 4cyl power band is but doing 65 mph with 4.56 your looking at 2676 rpm and with 4.88 your looking at 2864

Also going any higher than 3.73s you'll need a new carrier for your Dana 30

http://www.novak-adapt.com/knowledge/gearing.htm

Good luck!
CoryA is offline   Reply With Quote
Unread 02-24-2013, 11:11 AM   #3
bajaviking
Registered User
1985 CJ7 
 
Join Date: Jun 2004
Location: 5&10
Posts: 262
With a 5 speed tranny 4.88
__________________
85 CJ7 4.3L FI/700R , 4:1 Dana 300 and 3/4 ton diffs.
76 CJ7 6 cyl/t18/Dana 20 pretty much stock
"It ain't been so easy but I guess I shouldn't complain,
I've always been crazy but it's kept me from going insane"
bajaviking is offline   Reply With Quote
Unread 02-24-2013, 08:43 PM   #4
Dabney25
Registered User
 
Join Date: Feb 2013
Location: Huachuca City, arizona
Posts: 4
thanks for the help. i'm going to order the 4.88's.
Dabney25 is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.