what gear ratio to use for 33's
 

So i have 33x12.50 all terrains on my 95 runner. its a 3.0 v6 automatic. i want to regear the rear end but i dont know exactly what ratio to go for. im not looking to do any rock climbing or any serious trail riding since this one is my daily driver. i was wondering if anyone else has done this or knows a lot about this and which ratio i should use.

What did you find when you searched?

Robb, quit playing... You know you can't swap out the plastic differential gears...:wrench:

I usually add more "goo" to the gears. Helps with bigger tires.

If i were i would leave the stock gears in especially if its not bogging down and/or you do a fair amount of highway driving. Bigger gears=more gas. But if you must high 4's or low 5's. I have 33x13.5 mudders on my pickup with stock 4.10's and it doesnt bog down.

I have an '81 22R with stock gears which is 3:90 running 33 13.5 Toyo Open Country MT 's and 5th gear is non-existent. When I regear I'll go down to 5:29 with plans to run 35"s

I have 33x13.5 mudders on my pickup with stock 4.10's and it doesnt bog down.

Hard to believe that...even better, try a nice hill and see what happens. Just bought a 4.56 front third to replace the 4.10 that's in there now...just gotta track down a rear third in that flavor. I'm gonna run a set of 265/75r15's (essentially 31x10.5's...almost) that I got cheap last year. I have 235/75r15's on there now...one size up from the stock 225's. In summer, I can scream up the big hill in 3rd that I have to take to get out of the valley on my way to work...alright, not totally scream, we're talking 22re here. But in winter, w my hubs locked out and possibly in four wheel drive and I can only get second gear.

To the OP, you probably have the 4.88 stockers because of the 3.0 with the auto. You should be good. But dropzone is right....do some searching dude. The answers are there, have been asked before and answered before.

Check out what stock gears are in the truck by checking out the gear code on the VIN sticker. . For more info, check this link out.

in my t100 with the 3.4. 4.88s on 33s are about right. Could be a little lower for offRoad and big hills. Based on how your 4runner does now you should be able to figure out if you want a lot lower gears or just a little bit lower.

4.88 or 5.29

^^^^^^^ What he said^^^^^^^

4.88 or 5.29

I have 33's and run 4.88's. Works great for me. Mine is a 22re though.

I have been doing some research. Almost everything I read says either 4.88 or 5.29. And each thing said that one was better for almost the same reasons that another person said one size was good

@Daved 5150, i wasnt sure what type of drving dude was talking about. For highway id use 4.10's. Yes ibhave gone up a hill and you bet your ass i had to roll back down and go up a smaller one lol. I hate haveing those wide ass mudders, gas is terrible!!!!

4.88s

Yea, I know that 4.10's are optimal for highway driving...but with the stock or close to stock tire size. By rolling on bigger tires w the 4.10's, the engine drops out of the rpm range where it is most efficient and street performance drops off as well as mpg. I have a friend who has a new Jeep all done up with lift and 37's. Street wise, it's horrible he says. He knows he has to regear. With those 4.56's the rpm's will come back up to where they are supposed to be. The biggest tire I would prob run is a 32" or possibly 33", because and only because I have a stick. I don't want to roll down the hill....it's too long to go around and I am usually on the side of being late in the AM. Maybe I will put the 31's on w the 4.10's and see how she does up the hill. I'm not looking for a super tall mudder or rocker w HuGE tires, just a daily driver w decent off road capability and decent gas mileage. Wanna ARB the rear to start. Then start putting on armor. Geared right and locked w some armor, you can get pretty far in most situations, but not all.

In my 91 Toyota pickup 22re 4cyl with 5speed I swapped my 4:10 to 4:88 front and rear (duh) and went from street tires to 33x12.5x15 procomp mud terrains. It would get up and go same as stalk. And I could still run 80 mph. Def no issue crawling over stuff in low range.

You do state very good facts and now i feel enlightened! Your situation is definetely different than mine though. My yota is not a dd so im not having to go up or down any hills to get to work lol but i do take it out to the fields and roll around on some hill. Yes i will gear it because i plan to take it further than the fields. I have other things to fix before that though, my truck does lean to the passenger side so im gonna tweak with the t bars, maybe replace them if necessary. Thanks for the info!

THIS is what you should be looking for - stock acceleration/power after regear.

Bigger gears don't = more gas consumption, especially not if you're pairing them with larger tires. it's possible to consume more gas if you regear but don't increase tire size - this is because you'll be at higher RPMs for the same speed. on the other hand...the higher RPMs could put your into more optimum conditions and you'll see slightly better MPGs because the engine isn't struggling as much.

I find it VERY hard to believe that your rig doesn't bog down. I also live in Sac and the entire reason you feel you're ok with stock gears is because the area is FLAT with a couple "hills" that don't even count as more than a "mound", lol. try driving up 80 or 50 with 33s/stock gears while loaded up for camping/wheeling, and then report back about how you had to use 3rd or even 2nd gear on the hwy while everyone else was passing you at twice your speed :bigok:


To the OP: if your plans are to use the rig more offroad or do all city driving, then get 5.29 gears - you'll appreciate the extra torque at trail/lower speeds. If it's a DD/hwy rig, then get 4.88s because you'll have lower RPMs at cruising speed but the power will still be close to stock ratio - it'll be similar to stock gearing with one tire size up.

@highonpottery, the only reason I said that gearing lower might lower mpg Was that if I didn't get 33s and ran the 31s, I thought I would see higher rpms on the highway and increased gas consumption. But you do make a.great point by saying that by having the lower 4.88s I would have better performance by keeping the motor revs up and by the motor not bogging down.