Hey guys, I know there are millions of threads about gears and such but all I'm seeing are for 33" tires. I have new 31" tires on my Daily Drive and it sucks! I already know about the motor being VERY under powered and stuff but I also know of guys with 4cly going at least 65mph on the highway and interstate. Mine hasn't been over 50mph, very slow on take off and weak as crap on the smallest of inclines. I'm not looking for speed, just be able to drive it to work and not get ran over on the interstate. The rpms are, I think, low at 48mph, around 1500-1800. What would be a good gear swap for a daily drive that might see some dirt on the weekends?
Thanks for all the help for this question and the ones in the past.
my DD is a 92 YJ 4cyl w/ 31s... factory 4.10 and I regularly run 75-80 mph on the interstate... getting 17mpg... the secret, don't use 5th... 5th gear is an overdrive, it's designed to lower the RPMs, on a 2.5l, that just gets you under the power curve, the Jeep performs like crap, and your gas mileage goes south
90,s yj with 6 cyld/5spd came with ridiculous 215/75/15 tires and 3:07 gears from factory... THANKS EPA...
to OP best move i ever made with my YJ was to get 31x10.50 and a set of axles from a similar year 4 cyld which was 4:10.. I probably spent $1000 total and didnt need a lift etc, speeedo was fixed with some plastic gear thing for $10 also
99% sure your 5sp banger will have 4.10 already. Therefor, if you're gonna re-gear, then you only have 2 choices... 4.56 or 4.88. That is as high (low) as you can go. But you will not need a new carrier at least. Since you really do not gain much with the 56's, almost all banger owners go with the 88's. If u cannot do 5th now, then you should with 88's. Again, you have to make the choice about gearing the D35. If it is just a DD and you do not use it off road much, then I'm of the opinion to do it. You'll basically be getting a newly rebuilt rear end and it should do you a long time. If you have any intentions of locking it or going to larger meats to wheel, then it is a waste of $$... time to change axles.
'92 YJ, 4.0, 5sp, 8.8 w/ 4.56's locked F&R, Teralow 4-1, HD SYE, BDS 5" SUA lifted on 35 MTR's. PSE front trail cage kit, 1ton TRE flip, 1"shackles, 1"BL, 1" MM. <><
Originally Posted by 80 CHOPPER
Knowledge is a tool, without knowledge, you are just a tool.
4.88 are too high for 31" tires. 4.10 is probably best for manual trans
4.88 and 31's here with a 5 speed, it's about as ideal as you can get.
He's an angel dressed in oilskins; he's a saint in the "Sou'wester,"
He's a pluck as they come, or ever can;
He's a hero born and bred, but it hasn't swelled his head,
For he's just the U.S. Government's hired man.
My 88 with the 2.5L 5 speed and 4.10 on 33x12.50 will cruise at an indicated 65mph in 5th on flat ground, going up any small hill I can pull an indicated 60mph in 4th. On the bigger stuff I drop down to 3rd and do an indicated 45mph just to keep the RPM's down, I don't know how I feel about pushing a 25 year old engine with 175k miles on it any higher than 3,500rpm.
It is not fast by any means and will loose to a school bus in a drag race, but it cruises well enough for me and still has enough power in 4lo off road.