Jesse J Posted July 21, 2021 Share Posted July 21, 2021 I am looking for some opinions on running 35s on 4.27s. Stock 4.0 with ax15. I have a rear axle with 4.27s and a tru trac and the front doesnt have a carrier or gears so it would be cheaper up front to put 4.27s in and not touch the rear axle but also it would be better to just get the ratio I want the first time. Not a designated trail rig but it will see offroad a lot. Thinking about a true trac up front as well Link to comment Share on other sites More sharing options...
Pete M Posted July 21, 2021 Share Posted July 21, 2021 which axles are we talking about? not all ratios are available for all axles. Link to comment Share on other sites More sharing options...
Jesse J Posted July 21, 2021 Author Share Posted July 21, 2021 waggy d44s 4.27s are available Link to comment Share on other sites More sharing options...
89 MJ Posted July 21, 2021 Share Posted July 21, 2021 I’d run 4.56 if it were me. My truck on 31s with 4.10s turns about 2700 rpms at 75 mph. At that speed and rpm fuel consumption is about 3.5 gph. 4.56s on 35s would be similar to that. If you won’t go that fast very often though or live in hilly regions, I’d run 4.88s. Link to comment Share on other sites More sharing options...
89 MJ Posted July 21, 2021 Share Posted July 21, 2021 My dad has a YJ on 35s with 4.10s and a 5.3. He says that sometimes he wishes he put 4.56s in that. Link to comment Share on other sites More sharing options...
Jesse J Posted July 21, 2021 Author Share Posted July 21, 2021 15 minutes ago, 89 MJ said: I’d run 4.56 if it were me. My truck on 31s with 4.10s turns about 2700 rpms at 75 mph. At that speed and rpm fuel consumption is about 3.5 gph. 4.56s on 35s would be similar to that. If you won’t go that fast very often though or live in hilly regions, I’d run 4.88s. I was since the beggining planning to run 4.88s but it's costly. but the rear is set up already with 4.27s so it would be cheaper and easier but maybe I should just bite the bullet Link to comment Share on other sites More sharing options...
Jesse J Posted July 21, 2021 Author Share Posted July 21, 2021 ok going 4.88s and another true trac up front. That should be good right? Link to comment Share on other sites More sharing options...
MiNi Beast Posted July 21, 2021 Share Posted July 21, 2021 1 hour ago, Jesse J said: ok going 4.88s and another true trac up front. That should be good right? Yep. Run it. Link to comment Share on other sites More sharing options...
75sv1 Posted July 21, 2021 Share Posted July 21, 2021 A few things. First try and separate people with auto trans info from manual trans. Also, what is your plans, ie offroad, mixture, DD and some weekend trails? Also, even as a DD, I'd think about terrain or hills, vs mountains, vs flat land. I think there are some 4.30 gears for Dana 30's. You do have to look. Look here for a calculator: Gear Ratio Calculator (grimmjeeper.com) I do run two XJs. One is on 31's 3.73 and on 32.5's 4.10s , both autos. Both do OK on flatland. Both a bit sluggish in mountains of WV. the 32.5 was on 31's and it ran good in the Mountains. It did have issues before I bored the TB though. I do run about 2000 rpm at say 60 mph, and 2200-2300 at 70 mph. I plan to run 33's on my MJ with 4.10's and a manual trans. Link to comment Share on other sites More sharing options...
Jesse J Posted July 21, 2021 Author Share Posted July 21, 2021 2 hours ago, MiNi Beast said: Yep. Run it. badassery Link to comment Share on other sites More sharing options...
MiNi Beast Posted July 21, 2021 Share Posted July 21, 2021 Badassdor! Link to comment Share on other sites More sharing options...
Jesse J Posted July 21, 2021 Author Share Posted July 21, 2021 ordered . aint cheap but buy once cry once Link to comment Share on other sites More sharing options...
ghetdjc320 Posted July 22, 2021 Share Posted July 22, 2021 5 hours ago, Jesse J said: ordered . aint cheap but buy once cry once 4.88’s are great. 4.56 with an ax15 with stroker on 35’s was also nice but I could definitely have used 4.88’s though and that’s with plenty of long highway drives, Link to comment Share on other sites More sharing options...
ghetdjc320 Posted July 22, 2021 Share Posted July 22, 2021 By the way, here are the gear ratios for the AW4: 2.8 1.53 1.0 .75 AX15 3.83 2.33 1.44 1.0 .79 The unique thing to remember with an automatic is the torque converter, which in effect produces a sort of lower version of each gear. Top end highway speeds are very similar with both options. In practice, they both have a very similar effective first gear as well when the torque converter is factored in. Both are great tranny’s for our Jeep’s imho. Link to comment Share on other sites More sharing options...
Jesse J Posted July 22, 2021 Author Share Posted July 22, 2021 1 hour ago, ghetdjc320 said: 4.88’s are great. 4.56 with an ax15 with stroker on 35’s was also nice but I could definitely have used 4.88’s though and that’s with plenty of long highway drives, awesome 1 hour ago, ghetdjc320 said: By the way, here are the gear ratios for the AW4: 2.8 1.53 1.0 .75 AX15 3.83 2.33 1.44 1.0 .79 The unique thing to remember with an automatic is the torque converter, which in effect produces a sort of lower version of each gear. Top end highway speeds are very similar with both options. In practice, they both have a very similar effective first gear as well when the torque converter is factored in. Both are great tranny’s for our Jeep’s imho. thanks AX15 should be coming out of the cherokee this weekend! Link to comment Share on other sites More sharing options...
.thumb.jpg.eac92cd48b872a3d9085fc2cd936e941.jpg)
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now