Gear ratio swap

Hey I was just wondering if anyone has ever put a higher gear ratio in their first gen tundras and what were the results? Reason for asking is my stock 3.92s are done for figured I’d just order a whole new rear axle and replace everything. Fast forward about a week and the axle came today they sent me the wrong one the paper said it’s out of a 2005 tundra with 3.62s in it (I didn’t even know they ever put anything lower than a 3.92 in tundras) basically what I’m wondering is if anyone knows how this truck would perform with a higher ratio like that. I’m not too concerned about running 10s in the quarter mile as long as the engine is not bogged that’s all I care about. I really don’t want to go through the process of returning it and having my truck out of commission any longer if I don’t have to. Thank you in advance.

 

Never heard of 3.62, I would ask them to send the correct one asap. Gear ratios below have been run fine, never seen anybody fo the other way.

3.91
4.10
4.30
4.56
4.88

 

I agree with Luis. Only heard of 3.91’s and 4.10’s in 1st gens.

 

So how hard is it to swap gears? Front and rear? Or to add an lsd? And can you get an lsd for the front? I've never heard the front talked about.

 

Let’s put it this way, if you have to ask that, you shouldn’t do it....

Try and get the right gears for the rear that match your front

Gears alone are a pretty big task and something that will have your truck down for a few days of constant work, even more if you have a job other the being under your tundra

They are also relatively easy to screw up if you don’t know what your doing...

 

Take it to a shop to have the gears done. That’s the only thing I’ll ever have a shop do. It’s pricey but worth it if you’ve never done one.

 

It's not something I'd attempt. But I would pull them out to let someone else do it. I'm just being curious. I like to know how things work. (I'm in engineering school). And I do have a full time job, so it would take me even longer.

 

This!

 

Im kinda new to working on trucks I’m more of a boat guy so I’m not all that familiar with some stuff. A lot of you seem to say you won’t mess with that stuff and just to take it to a mechanic. I’m just wondering what is it that makes it so hard? Don’t make fun of me it’s a legit question lol. I just figured it would be old differential out and new differential in

 

So if all your swapping is the old center section for a new one, go for it! It’s a good way to start learning.

I (like others) assumes you were talking about swapping the actual gear set, so taking the diff out, removeing all the bearings, the old ring and pinion (the gear set), then installing the new r&p, the reinstalling the diff.

With setting up a gear set in a diff you have to make sure that you have all of it shimmed correctly to make sure that the r&p mesh properly, that is where the most people mess up, that is why I take my diffs to a buddy who has been doing diffs since before I was born,

 

Ohhhh ok yeah I wouldn’t wanna take it all apart myself I thought you guys were just talking about the center section now we’re on the same page

 

If you are interested in it and are a "mechanical" type of person - even setting up gears isn't that horrible. It isn't the worst job I have ever done. Granted, I haven't done any Toyota gear setups, but I can't imagine that they are too terribly different from some of the stuff I have done. Maybe I am wrong. It does require some extra tools, but I have always been happy when I "had to" buy some new tools.

Here are a couple of links for Ford setup stuff if you are interested. The Ford 9" is nice because of the preload adjusters vs. a shim design. Anyway, happy reading:

http://www.billavista.com/tech/Articles/Gear_Setup_Bible/index.html

https://www.ford-trucks.com/articles/ford-9-inch-rebuild-gear-setup/

I imagine you could find some stuff for Yota's if you dug around enough. I just haven't ever messed with the gearing setup on any of my Toyotas - so I don't have any links for them.