Scrussanation

my drive pinion broke terribly... I'll show pics soon, any thoughts as a good set to replace the unknown set I had in mine... I ran roughly 3k @ 65/70 mph and wanna know whats best for 80% Highway and 20% city as far as mpg is concerned... I just found out my gear ratio is 5.29 so glad to finally know that but would going to 5.79 help my rpm lower in fifth on the highway and how should I go about on using my 4x4 high/low in a pinch without screwing anything up... I cannot afford labor just parts so I will be doing all myself just need some thoughts on this. '89 pickup V6 3vze with the mods listed in my sig. thx for yalls input guys!!!

Yamiryder

5.72 would make the RPM higher at all speeds. If you're running 37's and 5.29's, then I personally think 3k at 65-70 isn't that bad.

vasinvictor

iTrader: (3)

3vze likes to rev and is perfectly happy at 3k. Even though RPM may be higher gas mileage may actually be better due to throttle position. So, either one will serve you fine, really. Go with what you find a good deal on.

dropzone

iTrader: (6)

I am sure you have checked zuk's site gearinstalls.com for recommendations.
driving a truck with 35-37+ tires are not going be get anything close to decent mileage. Lifted Toyota trucks have the aerodynamics of an outhouse.

arlindsay1992

iTrader: (8)

If you get a larger ratio ring and pinion your RPM will be higher in any gear for any speed. You will not get good mileage with 37's. If you're on a budget get 5.29 gears. If you change you will need to buy matching gears for the front diff. If you only drive on the road why do you run 37's?

Stetson_md

You shouldn't insult outhouses like that

osv

i run 37's with a 5.29... not sure what the rpm is, but the gps says that my speedometer is reading four mph faster than i'm really going... sounds pretty close to stock.

it's a true 37" tire, not undersized like km2's are.

Scrussanation

well its south tx road.. only people there understand its that bad.. Im just stuck using it as my work vehicle so gotta save all I can so I think im gonna lean more toward 4.88 gears.. reasoning is math if you know math good you will find good gearing with it... thoughts? and 37 inch helps with height i need to put rooftop rv acs on the roof

arlindsay1992

iTrader: (8)

If you install 4.88's it's going to be a dog on 37's. 4.88 gears are recommended for 33" tires.

snobdds

Not very smart...

Yamiryder

if you swap gears with 37's, get 5.29s. Or do you have 5.29's now? I'm confused. If you have 5.29's, that's basically the best gearing you are going to get.

93Xtra-Cab

Stick with the 5.29 gears. 5.71s will only increase your RPMS at highway speed. 4.88s will decrease RPM but you'll find yourself shifting into 4th going up any incline. You'll be at the lower end of the torque curve and your turning really heavy tires. It'll be a dog. As for fuel economy, I'm not sure what you get now, but it's safe to say any gear changes won't increase it because of tire size. Keeping the RPMs low is a great deal when it comes to fuel economy. But in this case, it'll just hurt you.

As for the roof thing, I'm not really sure what you're trying to say. The 37" tires makes your truck taller so you can install AC units on top of RVs? If that's the case, just get a ladder

Scrussanation

A ladder doesn't help you get 100 pounds of dead weight on top of a tall fifth wheel lol the extra height is needed and also decided I'll go with 4.88 cuz the 5.29 never used 1 or 2 much if at all and I already have to shift down to 4th cuz of the dang hill country. Besides I did the math and the 4.88 seem within range for what I need. Everyone thinks these toyos are super heavy when these tires aren't like the nitto grapplers. Those seem to have lil harder time moving down the road. He'll if not luck I'll just drop another 2 bills and get the 5.29 set if I dislike. Helps doing it all yourself I couldn't imagine labor cost lol

dropzone

iTrader: (6)

4.88 are gonna suck with 37's...but if you trust your math have fun driving a turd..

Scrussanation

Have you had the mods like I do on yours to know what results I'll have will be you may think it's wing but if you did research you'd see its not as far fetched as u think. Math is math and the way my truck is tuned with everytHing this will make this better. Remember my 3.go ain't slow ain't all and has lots of power and one I put the 7mge afm on this should be a great set up. I think I saw mud hippy state it somewhere regardless he does seem to know his ˟˟˟˟ when it comes to it but hey this whole thing is supposed to be fun learning experience anyways but I only off road when I have to pull my truck in odd spot to get ac on roof. Well update when it happens. My truck runs superb ever since I made it completely sealed that's one Hell of a great upgrade

Scrussanation

Sorry for typos I hate stupid phones

Yamiryder

Most people do have experience with trucks very similar to your truck. I'm sure other members have run 37's with a 3.0 and can tell you what will work good. If you don't believe them, then go ahead and run 4.88's. Oh, and you just argued with a moderator.

93Xtra-Cab

Yep, some things sound good on paper, but not so good in experiment...

Don't make the moderators angry...you wouldn't like them when they're angry

arlindsay1992

iTrader: (8)

If you're shifting into 4th now you'll be going into 3rd with 4.88's and it'll still suck. You said you're on a budget so why would you want to buy and set up two ring and pinion sets when you could buy only one? Just saying. You asked a question asking for peoples' opinion. Basically everybody here said to keep the 5.29's but you don't want to hear it. Do as you wish.

snobdds

I really don't think you have a clue what your doing, but I say go for it.