Notices
Modified JK Tech Tech related bulletin board forum regarding subjects such as suspension, tires & wheels, steering, bumpers, skid plates, drive train, cages, on-board air and other useful modifications that will help improve the performance and protection of your Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) on the trail.

PLEASE DO NOT START SHOW & TELL TYPE THREADS IN THIS FORUM

Biggest Gears?

Thread Tools
 
Old 01-01-2011, 09:54 PM
  #1  
JK Junkie
Thread Starter
 
matt852's Avatar
 
Join Date: Mar 2009
Location: Scottsdale, AZ
Posts: 2,368
Likes: 0
Received 0 Likes on 0 Posts
Default Biggest Gears?

What are the biggest gears you can stuff into the rear Dana 44? I was looking at the Front dynatrac axles that come in a 4.88-5.13-5.38 ratios.

Thanks!
Old 01-01-2011, 10:01 PM
  #2  
JK Enthusiast
 
Pluke the 2's Avatar
 
Join Date: Mar 2010
Location: Some Place in Africa
Posts: 441
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by matt852
What are the biggest gears you can stuff into the rear Dana 44? I was looking at the Front dynatrac axles that come in a 4.88-5.13-5.38 ratios.

Thanks!
538
Old 01-01-2011, 10:03 PM
  #3  
JK Junkie
Thread Starter
 
matt852's Avatar
 
Join Date: Mar 2009
Location: Scottsdale, AZ
Posts: 2,368
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Pluke the 2


538
Thanks Pluke 5.38's are probably going to be the biggest gears I will need for 37's right? How about the 30 in the front?
Old 01-01-2011, 10:06 PM
  #4  
JK Jedi Master
FJOTM Winner
 
nthinuf's Avatar
 
Join Date: Jan 2008
Location: Austin <--> Colorado Springs
Posts: 11,463
Likes: 0
Received 162 Likes on 154 Posts
Default

For an auto, yes. 5.38's may be a bit much for a manual, though. Do some reading, and plug some numbers into the chart in the drivetrain faqs. (unless you plan on moving past 37's?)
Old 01-01-2011, 10:09 PM
  #5  
JK Junkie
Thread Starter
 
matt852's Avatar
 
Join Date: Mar 2009
Location: Scottsdale, AZ
Posts: 2,368
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by nthinuf
For an auto, yes. 5.38's may be a bit much for a manual, though. Do some reading, and plug some numbers into the chart in the drivetrain faqs. (unless you plan on moving past 37's?)
Yeah I'm gonna keep the JK forever that's why I want to see how much I can put in the Dana 30's so when that breaks I'll move up to the 60, in 10-15 years I'll put some 40's on it and turn it into a rock rig
Old 01-01-2011, 10:15 PM
  #6  
JK Enthusiast
 
Pluke the 2's Avatar
 
Join Date: Mar 2010
Location: Some Place in Africa
Posts: 441
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by matt852
Yeah I'm gonna keep the JK forever that's why I want to see how much I can put in the Dana 30's so when that breaks I'll move up to the 60, in 10-15 years I'll put some 40's on it and turn it into a rock rig
dana 30 is 513. but it's going to be weak if you throw 37s on it.
Old 01-01-2011, 10:19 PM
  #7  
JK Jedi Master
FJOTM Winner
 
nthinuf's Avatar
 
Join Date: Jan 2008
Location: Austin <--> Colorado Springs
Posts: 11,463
Likes: 0
Received 162 Likes on 154 Posts
Default

5.13's on the D30. 5.38's on D44's.

Again, plug some numbers into the chart, and make sure you aren't taking gearing advice based on an auto trans.

4.88's will be ok for 37's
5.13's would be ok for 40's
But 5.38's would get you close to 3k rpm @70 on 37's.
Old 01-01-2011, 10:30 PM
  #8  
JK Junkie
Thread Starter
 
matt852's Avatar
 
Join Date: Mar 2009
Location: Scottsdale, AZ
Posts: 2,368
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Pluke the 2
dana 30 is 513. but it's going to be weak if you throw 37s on it.
Thanks, good thing 37 won't be for a while

Originally Posted by nthinuf
5.13's on the D30. 5.38's on D44's.

Again, plug some numbers into the chart, and make sure you aren't taking gearing advice based on an auto trans.

4.88's will be ok for 37's
5.13's would be ok for 40's
But 5.38's would get you close to 3k rpm @70 on 37's.
I think when I go for the big tires 37's I'll go with the 5.13 for my manual

Last edited by matt852; 01-01-2011 at 10:33 PM.



Quick Reply: Biggest Gears?



All times are GMT -8. The time now is 08:20 PM.