37s on factory gears

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You're pretty close to me. You're welcome to come take a look at my truck with 37's. I have 4.88's if you want to drive it and see how it feels (but my truck is also on the heavy side so take that into account). I can show you what I did to fit the 37's with a 3" lift and where I needed to trim.

I ran 35's and stock gears on my last 80 for 15 years. I never really had an issue with it. I'd be ok running 37's with stock gears if I had to but it wouldn't be ideal for sure. Driving roads like Parley's or Spanish Fork Canyon if you're going to Moab would be pretty brutal and slow on the hills. If you know that and don't mind dealing with 40mph climbs up some of the canyons then it'll be fine until you can regear.
Putting on the 37s this weekend a little nervous about rubbing my lift is bigger than 3" I will let you know how that goes I could use some advice on the trimming
 
Putting on the 37s this weekend a little nervous about rubbing my lift is bigger than 3" I will let you know how that goes I could use some advice on the trimming
37s, no lift, FTW :flipoff2: Rubbing is part of the fun.

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Personally I think anyone who is saying 35's on stock gearing is fine is out to lunch. The vehicle is absolutely atrocious on stock gearing anywhere near hills at 35s, I couldn't imagine it at 37s.

i still don't think it's great on 35s with 4.88 gears but it's significantly nicer to drive. You really have to beat on the truck to drive it through some mountainous areas, I also found the cruise control gets really out of whack on 35s with stock gears. Just don't. I really don't understand how anyone says 35s on stock gearing is fine.
 
Personally I think anyone who is saying 35's on stock gearing is fine is out to lunch. The vehicle is absolutely atrocious on stock gearing anywhere near hills at 35s, I couldn't imagine it at 37s.

i still don't think it's great on 35s with 4.88 gears but it's significantly nicer to drive. You really have to beat on the truck to drive it through some mountainous areas, I also found the cruise control gets really out of whack on 35s with stock gears. Just don't. I really don't understand how anyone says 35s on stock gearing is fine.
I have 35s its not too bad honestly yeah not great up canyons but off road is just fine
 
I have 35s its not too bad honestly yeah not great up canyons but off road is just fine

Even offroad I'd say the stock gearing on 35s is horrible. You'll have zero torque (well not actually zero but I'm being hyperbolic) at idle and it'll put significantly more stress on the drive train since you'll need a lot more skinny pedal to go.

While these things aren't a mk4 supra it shouldn't drive like crap. I wonder how much some people abuse their rigs. Don't be that guy with clicking birfields, old coolant hoses, etc. on the trail.

If you live at sea level elevation and off road at roughly sea level elevation then I'd say 35s on stock gearing is tolerable.
 
Even offroad I'd say the stock gearing on 35s is horrible. You'll have zero torque (well not actually zero but I'm being hyperbolic) at idle and it'll put significantly more stress on the drive train since you'll need a lot more skinny pedal to go.

While these things aren't a mk4 supra it shouldn't drive like crap. I wonder how much some people abuse their rigs. Don't be that guy with clicking birfields, old coolant hoses, etc. on the trail.

If you live at sea level elevation and off road at roughly sea level elevation then I'd say 35s on stock gearing is tolerable.
I have had 35s on 2 80s over 4 years, The truck is sluggish up hills but crawling has been fine. If I do a long trip I will more than likely trailer it anyway not too worried about that. It is interesting how a few in here say 37s are fine and have done it, and some say you cant even run 35s confusing
 
What about factory gears and 10% underdrive (high range) gears in the transfer case?
 
I have had 35s on 2 80s over 4 years, The truck is sluggish up hills but crawling has been fine. If I do a long trip I will more than likely trailer it anyway not too worried about that. It is interesting how a few in here say 37s are fine and have done it, and some say you cant even run 35s confusing

I guess?

I don't think it's that confusing honestly. The 80 is a fairly modern vehicle and should drive like a fairly modern vehicle. Also driving in 2nd gear at 55 mph on i-70 makes you a traffic impediment and a road hazard when trying to merge.
 
What about factory gears and 10% underdrive (high range) gears in the transfer case?

Overdrive/underdrive trips me up a bit. But if you're on 35s and going to hit 4.55s with a 10% underdrive that'll work just fine at highway speeds. At that point I'd just underdrive the low end gears as well and rebuild the transfer case (new bearings, new seals, and new synchros). You already have the thing out and the rest of that isn't much work. My opinion is to always go the extra mile when you're doing vehicle work, save yourself the headache and troubles down the road.
 
Also driving in 2nd gear at 55 mph on i-70 makes you a traffic impediment and a road hazard when trying to merge.
Only for like 4 months out of the year. The rest of the year 55mph is too fast 🙃
 
Overdrive/underdrive trips me up a bit. But if you're on 35s and going to hit 4.55s with a 10% underdrive that'll work just fine at highway speeds. At that point I'd just underdrive the low end gears as well and rebuild the transfer case (new bearings, new seals, and new synchros). You already have the thing out and the rest of that isn't much work. My opinion is to always go the extra mile when you're doing vehicle work, save yourself the headache and troubles down the road.

I am not against the idea of doing both while in there.

I guess I could have been a little more clear. Have people run 37s with stock gears in the 3rds and installed over/under drive gears?
 
Only for like 4 months out of the year. The rest of the year 55mph is too fast 🙃

That's like the best months in Colorado to go wheeling! Also if you're taking the rig up to any of the ski resorts it's not like i-70 is always covered in snow/ice.

I digress and I'll see myself out but I just don't see how anyone thinks the 80 is suitable to drive on 35s+ without a regear. There are people who engine swap and turbo the 1FZ/3FE because of it's lack of power. Even then most of those folks don't claim their rig is blistering fast, just nice and comfortable to drive. The 80 was designed to be an expedition vehicle (drive from here to there) and not a rock crawler in which Toyota would have just built a buggy but that's besides the point. Ruining the usefulness of the vehicle just makes the engineering degree on my wall sad.
 
Also if you're taking the rig up to any of the ski resorts it's not like i-70 is always covered in snow/ice.
LOL. More often than not it is a multi-day per week occurrence from November to April, especially between Copper and Glenwood Canyon.

The 80 was designed to be an expedition vehicle (drive from here to there) and not a rock crawler in which Toyota would have just built a buggy but that's besides the point. Ruining the usefulness of the vehicle
You’re conflating tire size with owner usage and desire. Under that logic, this is a mud truck:

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LOL. More often than not it is a multi-day per week occurrence from November to April, especially between Copper and Glenwood Canyon.


You’re conflating tire size with owner usage and desire. Under that logic, this is a mud truck:

View attachment 2894618
I literally said it's not like the i-70 is covered in ice and snow everyday. Not that it doesn't snow a lot there.

You're missing my point. The only merit to not regearing is saving money. You're not driving the 1fz/3fe in it's intended power band ratio, it'll likely get worse gas mileage in most instances, have higher stresses on the drivetrain, the cruise control won't work properly, and it drives terrible. So yes... it's actually ruining the functionality of the vehicle. Toyota even changes out their gear ratios depending on their application.

If you're not going to do it right I don't know why people bother but then again people throw metal tape and bondo all over their land cruisers. People are free to choose whatever they want but that doesn't make it not a terrible idea.
 
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If you're not going to do it right I don't know why people bother
Quite a verbose explanation for that to be your ultimate point. Doing it “right” is subjective. While you quarrel within yourself about this, the rest of us will be having fun on our 37s, even those of us with stock diffs who live in the mountains and drive them on I-70 :flipoff2:
 
Quite a verbose explanation for that to be your ultimate point. Doing it “right” is subjective. While you quarrel within yourself about this, the rest of us will be having fun on our 37s, even those of us with stock diffs who live in the mountains and drive them on I-70 :flipoff2:

You don't seem to have a good grasp on what the term subjective means.

Without re-gearing the driveability of the 80 series performs significantly worse than on stock gearing and stock tires. That's engineering 101. If you're being cheap, fine but stop pretending it's anything but that.

Plus points for acting like a child.
 
2nd gear is your friend on long steep grades. Wind it up to 4K.
This. Too many baby the 1fz. It’s a glutton for punishment. Let it eat.
 

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