Gears and Tire size with Auto and 6 Speed - Page 2 - JeepForum.com

Reply
 
LinkBack Thread Tools
post #16 of 23 Old 07-24-2010, 08:54 AM Thread Starter
MilitaryJK4455
Web Wheeler
2010 JK Wrangler 
 
Join Date: Mar 2009
Location: Ft. Detrick MD
Posts: 2,624
Quote:
Originally Posted by MoparToYou View Post
I would add another line at the bottom of your opening post for auto tranny with 5.38 gears. It is still only "acceptable" based on your chart, and I would agree with that. 5.38 gears are acceptable, but not great by any means. For performance gearing, or high altitude, in an auto tranny Jeep, you need lower gears than 5.38. 5.86 gears or 6.17 gears would be more appropriate for performance, and or high altitude use. Too bad they don't make 5.86 or 6.17 gears for our axles.

I live at 6000 feet elevation, at the base of a mountain that is 11,000 feet elevation, and I have 35" tires with 5.38 gears in my auto trans Rubi. Hate to say it, but it is still a dog. My Jeep downshifts just to make it over a freeway overpass. Another hundred horsepower under the hood would help.
That is what I was getting to with my last line, that even at 5.13's you are just starting to get to stock configuration... If people cant continue to read into the chart after all that explaining I did.... Well.... They might should just stay away from Jeeps altogether ... I was trying to teach people to read and understand that chart by typing out all of those sentences so that they can compare the two charts with my explanations. You can almost over gear a 6 speed before you have even gotten to the acceptable gearing for an auto.

Oh... And about this being a sticky... Its in the F.A.Q and that is in the process of becoming a refined sticky once JLC08JK gets it put together.

MilitaryJK4455 is offline  
Sponsored Links
Advertisement
 
post #17 of 23 Old 03-23-2012, 08:35 PM
jimbos76cj
Registered User
1989 YJ Wrangler 
 
Join Date: Jun 2007
Location: Florida
Posts: 614
great post

88 YJ 35's 8.8 rear, family style roll bar, ax-15 external slave conversion, Custom double D fab dash 4" of lift taurus fan, Head light wiring upgrade, MSD 6al, JB conversions SYE, 258 with RV cam, Long tube headers, Borla exhaust. 1"mm, Auto meter gauges.
jimbos76cj is offline  
post #18 of 23 Old 03-24-2012, 04:16 PM
jimbos76cj
Registered User
1989 YJ Wrangler 
 
Join Date: Jun 2007
Location: Florida
Posts: 614
I had to dig it up. Needed it to show in my post so I could open it and text it to a friend.

88 YJ 35's 8.8 rear, family style roll bar, ax-15 external slave conversion, Custom double D fab dash 4" of lift taurus fan, Head light wiring upgrade, MSD 6al, JB conversions SYE, 258 with RV cam, Long tube headers, Borla exhaust. 1"mm, Auto meter gauges.
jimbos76cj is offline  
post #19 of 23 Old 03-25-2012, 09:25 AM
TomF
Registered User
2010 JK Wrangler 
 
Join Date: Nov 2007
Location: Gainesville
Posts: 214
Excellent post!

Two variables worthy of note:

1. Actual tire diameter often varies from advertised diameter, and tire diameter changes with load and inflation level. So you need to measure for yourself - most accurate measurement is from ground to center of hub of mounted tire x2. Don't bother to measure the spare.

2. Personal preference. If crawl speed in reverse is more important to you than getting to work on time, you need to move up to the high blue and even into the white on chart .
TomF is offline  
post #20 of 23 Old 05-17-2013, 12:35 PM
greenfrj
Registered User
2013 JK Wrangler 
 
Join Date: Mar 2013
Location: Camarillo
Posts: 3
Is there a chart for the JK's with the 3.6?
greenfrj is offline  
post #21 of 23 Old 05-17-2013, 04:52 PM
dualtjs
Registered User
2011 JK Wrangler 
 
Join Date: Mar 2008
Location: Atlanta
Posts: 1,281
Quote:
Originally Posted by greenfrj View Post
Is there a chart for the JK's with the 3.6?
Here ya go:

http://www.wanderingtrail.com/Mechanical/gearratio.html

I won't go through all of the explanation that the OP did.
dualtjs is offline  
post #22 of 23 Old 05-17-2013, 04:55 PM
dualtjs
Registered User
2011 JK Wrangler 
 
Join Date: Mar 2008
Location: Atlanta
Posts: 1,281
JLC08JK,

The OP of this thread did a good job explaining how to read the chart. I know that there are a number of gear/tire threads in the sticky, but given the 1st post, this would be a good candidate for the FAQ sticky.
dualtjs is offline  
post #23 of 23 Old 06-27-2014, 12:42 AM
Heat1995
Registered User
 
Join Date: Feb 2012
Location: Cypress
Posts: 5
Not the sharpest

Sorry guys but I need someone that is clearly more knowledgeable than myself to explain. If an auto tranny with 35's and 4.88's is a doable set up (close to stock)
and auto tranny with 5.13's has just gotten to a stock set up (the lower end of stock) which of the two is better? Close to stock or lower end of stock? Finally does a Dana 44 front and back have any impact at all?
Heat1995 is offline  
Reply

Tags
gear chart , gear/tire chart , JK Wrangler , wrangler

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
3:73 gears and 35s with a 3 speed Auto sethkins88 TJ Wrangler Technical Forum 6 06-09-2010 11:28 AM
Buying 08 X w/auto 3.73 gears and 17x7.5 Tire size question dstephns JK Wrangler Technical Forum 5 07-03-2007 11:30 AM
Running 32's with 3.07 gears and 3 speed auto? zach1288 TJ Wrangler Technical Forum 12 10-08-2005 10:04 AM
What Gears w/ 35s and 6 Cyl. /4-Speed Auto Pog TJ Wrangler Technical Forum 3 06-28-2005 01:04 PM

Posting Rules  
You may post new threads
You may 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 Off
Pingbacks are On
Refbacks are On

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