Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum > Re-Gearing a 2.5L

Join Wrangler Forum Today


Thread: Re-Gearing a 2.5L Reply to Thread
Title:
  
Message:
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

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.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
08-10-2010 11:00 AM
4Jeepn One other thing to consider, the rear dana 35 axle should be okay with 33 tires. However if you plan to add a locker to it.. chances are it will bust on you. You might want to look at either upgrading the whole rear axle or upgrading the shafts.
08-10-2010 10:38 AM
jack01986 Thanks for that again appreciate the help. Might be a bit tough for the mechanic in Ireland to source the parts but we will see what we can do. 4.88 it is and we'll probably be going down to 33" tires as well.
08-10-2010 10:32 AM
Jerry Bransford Your axles can't be regeared to a ratio lower than 4.88 so 5.13 is not even doable. I would stick with 33" tires and 4.88 gearing which is as big of a tire as your 2.5L engine can handle without losing too much power.

Yes you need two sets of ring & pinion gears, one per axle. But don't buy them on your own with expectation to supply them to the installing shop. If you do and something goes wrong, the installer will blame the parts you provided him and not cover them in his warranty. And then the parts provider will blame the installer and not want to cover them either.

Have the shop provide EVERYTHING and then their warranty will cover anything that goes bad which does happen. One of my R&P jobs went bad 3 weeks after completion and the shop covered the whole thing without drama because they provided all the parts and labor.
08-10-2010 10:22 AM
jack01986 Thanks for that, where would one go to get this done? Is there parts you can buy on the net and get them fitted? Would this be what I would be looking at getting? http://www.quadratec.com/products/52419_92X_PG.htm

Also excuse my ignorance but do you need two of them front and back?
08-10-2010 07:12 AM
RSC17 that's overkill in my opinion. 4.88's are fine.
08-10-2010 05:59 AM
jack01986
Re-Gearing a 2.5L

Well after doing some searching here on how to increase power in the enigne it seems that it best to keep it stock. It looks like i would have to get the car re-geared to get the best out of its power. The jeep is used mostly for offroading and driving on snow so I dont mid sacrificing some drivability on the road for increased performance off-road. How expensive is this likely to be to get done? I think the ratio I would need to get for the jeep with 34 inch tires is 5.13 for the best power output. Is this right or am I miles off? Ive no real idea about the gearing it wouldnt be my stong point. I appreciate the help.

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


All times are GMT -5. The time now is 11:37 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC