Help Request - Rear Diff Compatability

[pc1p]

Help Request - Rear Diff Compatibility

Alright boys and girls, I did some searching - about 2 hours worth and my Google Fu has led me to dozens of broken links and conflicting info. Time to turn to the experts (you!)!

Here's what I'm trying to find out:
[MENTION=80933]4x4runner2002[/MENTION] is selling a complete third member with an Aussie Locker (something I was going to get anyways) with 4.10 gears. This is the original but upgraded factory rear diff from his 2002 4WD.

http://www.toyota-4runner.org/sale-t4r-items/183467-fs-aussie-locker-socal-2.html#post1887713

I would like to install this in my 2004 2WD V8 T4R but I don't know if it will work or not, or what part compatibility issues I may run into (driveshaft flange for example).

From what I have found, there are 4-Cyl versions, V6 versions and a high-pinion version of the Toyota 8", which is the rear I THINK I have... Maybe? I don't know. I can't find any reliable info other than that V8 Sport 2004's have 3.73 gears.

Can anyone point me into the right direction? I'd like to spend some of my hard-earned consulting money this month so that he can get his radio installed and I can feel bada$$ in my 2WD :cowboy:

 

[gtb129]

I think 6cyl, and high pinion diffs are the same as far as "Will it fit". If I remember correctly, the high pinion diff is a 4 pinion and the 4cly (4wd) is a 2 pinion. This is pre-tacoma 4wd trucks and 4runners. I cant speak for tacoma/4runner 4cly diffs because I have never actually held one. From what I understand though, the bolt pattern on all 8'' axles/third members are the same. Axle spindle count veries between models, and E-locker third members are bigger than standard thirds. 4 cyl 2wd pickup/tacoma/4runners have an8.4 inch rear axle and will not work with our 4runners (I THINK).

Your third SHOULD bolt right up. I say just try it. Might cost you gear oil and a few hours (if its your first time doing it).

First thing I would do is pull an axle and make sure the spindle will plug into the diff (before you pull the diff in the 4runner). If it does; Plug that puppy in and have fun!

 

[Johnny4runner]

I'm pretty sure the pinion flange is different for pre-2003 4Runners. 2003 and after are 66mmx66mm and before that the pattern was smaller. Your current flange probably won't fit because the pinion spline count changed also. And even if it did fit, swapping might mess with the preload unless the 3rd used a solid spacer. Other than that it will bolt right up.

BTW I would steer clear of a lunchbox locker for anything that sees much onroad driving. There is a reason why the seller swapped to an air locker.

 

[Minnesota Yota]

not sure if this will help you but its worth a shot right?

Toyota Pickup and 4Runner Drivetrain Specifications

I found my axle code on my door jamb vin sticker.

 

[awdjunkies]

not sure if this will help you but its worth a shot right?

Toyota Pickup and 4Runner Drivetrain Specifications

I found my axle code on my door jamb vin sticker.

Great Info/resource :yo:

 

[ireoyellet]

There is a reason why the seller swapped to an air locker.

 

[powrguy]

Axle Ratio

not sure if this will help you but its worth a shot right?

Toyota Pickup and 4Runner Drivetrain Specifications

I found my axle code on my door jamb vin sticker.

I've got a 1998 SR5, with V6, automatic. I have the 16" alloy wheels, all stock.

I looked at what I thought was the "axle ratio" sticker (the code I found was A03A/A340F) on the driver's door jamb.

I understood nearly all V6/Auto with 16" wheels were 4.10 ratio, but this is confusing me now. I have the rusted diff cover, and was buying a 4.10 ratio 1999 complete rear for a swap, but now wonder if I have the right ratio.

HELP !

 

[Link12]

This one makes it pretty easy. Gearratiosanddiffs

 

[powrguy]

Diff ratios

This one makes it pretty easy. Gearratiosanddiffs

That's better....according to that chart, I DO have the 4.10 ratio.

thanks alot

 

[pc1p]

I'm pretty sure the pinion flange is different for pre-2003 4Runners. 2003 and after are 66mmx66mm and before that the pattern was smaller. Your current flange probably won't fit because the pinion spline count changed also. And even if it did fit, swapping might mess with the preload unless the 3rd used a solid spacer. Other than that it will bolt right up.

BTW I would steer clear of a lunchbox locker for anything that sees much onroad driving. There is a reason why the seller swapped to an air locker.

Thanks for the help!

I had to pass on this b/c of the exact reason above. I wasn't going to save any time/money/hassle this way vs having my swapped out.

I do mostly on-road driving, with the occasional desert trail (which my one-wheel wonder has proven to handle pretty darn well thus far), camping trip or lake visit. The reason for looking was mainly due to the fact that I dread unloading a boat or our jet-ski's in the lake. When I pull out, my single wheel spins and spins. I probably burn off 1000-miles of tire per trip to the lake just getting the truck high enough above the water line to get to dry pavement.

I decided a TruTrac is for me and a regear while I'm at it. Gonna go with 4.10's and the TruTrac, probably just before summer hits. Thanks again!