Gears & RPM - highway driving
#41
JK Super Freak
Join Date: May 2008
Location: Grand Junction, CO
Posts: 1,279
Likes: 0
Received 0 Likes
on
0 Posts
#42
I appreciate the feedback and have been researching the heck out of this. I have looked on this forum as well as others and there is a considerable amount of contradictory information out there. The gist seems to be 4.88 or 5.13 depending on who answers the question. I figured I'd talk with someone who installs ring and pinions in the JKs for a living and in each case they thought that 4.88s was the answer. No offense to anyone, but the advice of two techs that do this for a living holds a lot of weight with me as I'm sure it would with many. Unfortunately it has only added to my confusion.
#43
JK Freak
Join Date: Oct 2007
Location: Hangin in the sunshine state....staging forum..
Posts: 943
Likes: 0
Received 2 Likes
on
2 Posts
I appreciate the feedback and have been researching the heck out of this. I have looked on this forum as well as others and there is a considerable amount of contradictory information out there. The gist seems to be 4.88 or 5.13 depending on who answers the question. I figured I'd talk with someone who installs ring and pinions in the JKs for a living and in each case they thought that 4.88s was the answer. No offense to anyone, but the advice of two techs that do this for a living holds a lot of weight with me as I'm sure it would with many. Unfortunately it has only added to my confusion.
#47
JK Enthusiast
Join Date: Nov 2008
Location: Newbury Park, CA
Posts: 230
Likes: 0
Received 0 Likes
on
0 Posts
I agree that the 4:88 are NOT going to get into the proper power range for highway speeds.
Now do I go with Superior Gears or Delux or What MFG. I understand they are ALL mfg overseas,
but they ALL offer a Lifetime Mfg and no labor.
Hope to hear from a lot of you......
#48
JK Enthusiast
Join Date: Jan 2007
Location: Corinth, MS
Posts: 132
Likes: 0
Received 0 Likes
on
0 Posts
Redneck, I've read several of your posts in many related threads I've searched on gears. I thoroughly respect your expertise. I will reiterate a question I've seen unanswered for many, and it is a question I have . . . .
I've unfortunately bought a Sahara (didn't realize how "into" wheeling I'd get). I've currently got a 3.73, needs to be upgraded, no brainer for any setup . . .
I've got 33 12.50s. I know your recommendation on 5.13s for the D44, but what do you recommend for the D30. I'm affraid to go bigger than 4.88 (r/p. . .), and with the 33's I'm curious what you or anyone who wants to chime in thinks.
I've unfortunately bought a Sahara (didn't realize how "into" wheeling I'd get). I've currently got a 3.73, needs to be upgraded, no brainer for any setup . . .
I've got 33 12.50s. I know your recommendation on 5.13s for the D44, but what do you recommend for the D30. I'm affraid to go bigger than 4.88 (r/p. . .), and with the 33's I'm curious what you or anyone who wants to chime in thinks.
#50
JK Enthusiast
Join Date: Mar 2009
Location: NYC area
Posts: 271
Likes: 0
Received 0 Likes
on
0 Posts
Ok so I finally decided to pay attention to my rpms at 75 mph on my way to drop off my Jeep at Clayton on Thurs. Stock Rubicon auto I was at about 2300 rpms at 75. From what Ive read, I think on here, is 5.38s with 35s will put me at about 2750 rpms. Is this about right? Im getting 5.38s installed so I guess Ill know in about a week. What Im getting at is 450 to 500 rpms doesnt seem so insane as some people say 5.38s are too much. Plus I may eventually go to 37s, thats why I went 5.38.