Regear help please

I've looked and looked on information about regearing and being the newbie to things like this, I can't quite get the answer I'm looking for. I'm probably regearing my rear end to 4:10 in the next few weeks. I'm 4x4 so will need to regear the front as soon as I can. I found a part on Craigslist that I would need for the front regear but the question I have is, what other parts will I need on top of this to get the 4:10 in the front as well. I attached a link to what I found.

https://greensboro.craigslist.org/pts/6191456532.html

 

LOL, the seller thinks the ADD actuator is an e-locker...

 

I guess I take that as more parts, but no info on what I need?

 

Both you and the seller seem clueless

The basics:

If that front differential is really geared with 4.10 gears, then you do not need any other parts. Just swap your front diff with that one. But you have to be 100% sure it has those gears. If you mismatch your front and rear differential gears by a large margin you run the risk of destroying your transfer case.

For future reference:

When people talk about "regearing" their diffs, that usually means you buy a new ring gear and pinion (they come together as a set), as well as something called a "master install kit", which is all the bearings, shims and hardware needed to do the installation. Then you need to take it to a professional to do the work.

Regearing axles is usually expensive when you add the price of the parts plus labor. If you have bigger tires and plan to do serious wheeling with your truck, consider getting a lower (numerically higher) gear than 4.10. Many people go for 4.56 or 4.88, though it seems like 4.88 is a popular choice.

People often choose to install a locking differential (a device that "locks" both axle shafts thus increasing traction) while they are doing gear work, since everything is pulled apart. That obviously adds a significant amount of money to the project, but it is money well spent. Air lockers are the most preferred option for front differentials. Electrical lockers are popular for rear axles. Mechanical lockers are cheaper but they often make loud noises when doing tight turns. Some people hate mechanical lockers because of this.

Hope this helps.

 

Quality post above.

Would simply like to add, if taking to a "professional", take to either a transmission/driveline/offroad truck shop or even the dealer. Do not take your diff to a regular repair shop like firestone, midas, they'll have no clue what their doing, diffs is not typically what those shops mess with.

 

How do I figure out for sure that this listing is actually 4:10. I know he posted a picture of a label for it stating 4:10, which I know obviously doesn't guarantee for sure 4:10. I'm gonna be swapping my stock 3.73 rear with a fellow member in the next few weeks for his 4:10 so I was hoping to get the front done as well. I'm running. 285/70/17 tires and don't plan to ever go any bigger so 4:10 should be fine for what I have and will be doing.

 

"don't plan to ever go any bigger" - famous last words

You might want to a little search online about how to know what gear ratio you have on a diff. Tons of info about it available.

There are different methods. I think the easier one in your case would be to crack the diff open and count the teeth on the ring gear and pinion. Bring a cordless impact, remove the bolts, count the teeth, put it back together with a bead of super gray sealant. Can't remember the number of teeth for a 4.10. Search online.

Other methods of knowing what gear ratio you have might not be practical for you because they require you to spin the pinion to count drive shaft rotations...not sure how you can do that with the diff removed...maybe do some sort of bench test immobilizing the diff and using some CV shafts? Dunnoo...

 

Mic drop.

 

I saw same CL ad last night, I didnt give it any serious look once it said elocker. no such thing in the front.

 

maybe with these kinds of things, you can walk away with a deal, since the guy posting doesnt know anything?

 

haha, mebbe

 

maybe its got an arb in there ?

 

holy shit a front e locker, where has this been my whole life.

 

Some land cruisers came with front elockers

But yea, not for the tacomas.

 

maybe that's the front end out of an 80s cruiser, or a gx450

 

On a differential that's already pulled out, the easy way to find the gear ratio is to draw a line all the way across this bearing surface:


Like this:


Then if you turn the driveline flange, the line will do this:


Count how many full turns of the driveline flange it takes for the line to return to its starting point. If it's slightly more than 4 full turns, it's a 4:10 gear ratio.

 

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There you go....learning new tricks everyday

Good info.