I have a Tj wrangler rubicon 4.0 automatic I am running 33” tires and I am about to re gear due to some issues I am having. The shop that is doing the work is telling me to go with 4:88s. It is a daily driver. Would I be better off with the 4:56s
Nope. As above 5.13 rpms will be ideal for highway speeds. I'm running 5.38 with 35's with the same transmission and my highway rpms at 70 are ok but I actually wish they were just a little higher.Thanks for the feedback Jerry. So the 5:13s will not be too low on the highway s and interstate at higher speeds right?
Go with the thick version of the 5.13 gears so they will fit your Rubicon locker cases. The below is from my install.Thanks guys for all the valuable info. Looks like I will be rolling with the 5:13s soon. Will let y’all know how they are.
2004 Rubicon. You can see what I and other people have by clicking on View Profile under everyone's name.What year TJ do you have?
Hey do you still have the silver half doors?If you have the 3-speed auto, go with 4.10 gears. If you have the 4-speed auto, go with 5.13 gears.
Never had them. That was a local Craigslist ad I shared.Hey do you still have the silver half doors?
Not trying to hijack this thread but I have a question.Nope. As above 5.13 rpms will be ideal for highway speeds. I'm running 5.38 with 35's with the same transmission and my highway rpms at 70 are ok but I actually wish they were just a little higher.
I almost forgot to mention my mpg went up from <12 mpg to 14.6 mpg after regearing from 4.88 to 5.38. The engine was operating more efficiently and not lugging at the slightly higher rpms.
5.38 is as as low of a ratio as can be installed into our Rubicon axles with Rubicon lockers so that's my recommendation for our TJ Rubicon axles with an automatic transmission. If I had big aftermarket axles like from Rockjock or Dyna I'd go with a lower ratio like 5.89 but that's not possible for a TJ Rubicon Dana 44.Not trying to hijack this thread but I have a question.
I have an 06 JL Rubi with 35s and I'm about to do a regear. You said you have 5.38s with your 35s but wish it was different. What do you recommend then for highway speeds and 35's?
Thanks Jerry5.38 is as as low of a ratio as can be installed into our Rubicon axles with Rubicon lockers so that's my recommendation for our TJ Rubicon axles with an automatic transmission. If I had big aftermarket axles like from Rockjock or Dyna I'd go with a lower ratio like 5.89 but that's not possible for a TJ Rubicon Dana 44.
If you wanted to change lockers you could go 5.89. Expensive though.5.38 is as as low of a ratio as can be installed into our Rubicon axles with Rubicon lockers so that's my recommendation for our TJ Rubicon axles with an automatic transmission. If I had big aftermarket axles like from Rockjock or Dyna I'd go with a lower ratio like 5.89 but that's not possible for a TJ Rubicon Dana 44.
Do you recall off the top of your head which speedo gear you ended up using?5.38 is as as low of a ratio as can be installed into our Rubicon axles with Rubicon lockers so that's my recommendation for our TJ Rubicon axles with an automatic transmission. If I had big aftermarket axles like from Rockjock or Dyna I'd go with a lower ratio like 5.89 but that's not possible for a TJ Rubicon Dana 44.
Interesting idea. For now at least I'd like to stick with the stock lockers. But I'll sure keep it in mind.If you wanted to change lockers you could go 5.89. Expensive though.