4.30 axles gears or 4.56

[slapdappy]

I called this morning and they used the VIN to determine what the gear ratio is. How accurate is that? They said they will pull it and check it for me but sounds like that will take a few days.

ask if you can put in a refundable deposit to preserve right of first refusal in case it is not what they think it is.

 

[alanflies]

?
i marked my rear driveshaft, marked my tire, logged revs per rev for 20 tire revs, came to 43, i.e. 4.3/1 rear diff for my 99 with e-locker.
the key seems to be doing a full 20 tire rotations for an accurate diff ratio number.

I could see it if you turned the wheel 10 times and got 43 drive shaft revs...
Anyway, as others have said, the only way to be sure, is to put your hands on them...FAST. before they get away...:zoom:

 

[alanflies]

Just for reference, I just paid over 3500 to have 4.56's front and rear with air lockers installed. I'd jump all over that if I were you!

Yep, 400.00 is a smokin deal...:iagree: I just dropped over 1600.00 for 5:29:1 locked front and rear sets...

 

[slapdappy]

I could see it if you turned the wheel 10 times and got 43 drive shaft revs...

Nope. 20 times. Then divide by 10.
Followed directions of post #11 in link and came up with exactly 43 shaft revs per 20 tire revs.
If you try it let me know what you come up with, please.

 

[krenaud33]

ask if you can put in a refundable deposit to preserve right of first refusal in case it is not what they think it is.

Good ideal. Not sure how this place will take that though. I asked them to email me some pictures and they were not willing to do that. I also mentioned wanting to come get it Saturday if it is what they say it is and they told me they weren't sure that was in their time line. (they did say they would pull the axle and confirm the ratio, not sure when though) I don't want to make a 2 hour trip there without knowing what it is.

If I have a chance to tonight I will do the revolutions spin on my 4Runner to see what I have now. Just in case I would have 4.56 I wouldn't need the axles anyway. (I am guessing I have 4.30)

At the very least tonight I will see if I can match my model code with this chart.....
http://www.sonoransteel.com/include...eel/TechArticles/1996-2004ToyotaGearRatio.pdf

 

[xcmtb83]

The chart over at SS has never let me down. I don't have any faith in a yard telling me the ratio over the phone especially with 3rd gens. I believe their software is more accurate for 2nd gens though. Get on car-part.com you will find a bunch of 4.56 elockers listed, too bad they aren't accurate. isu2014 called all over only to find out the ones listed were V6 4Runners which of course never received 4.56 gears. I was going to go the 4.56 route too since I have a 4.56 front collecting dust so I called around and I also came up empty handed.

 

[whiskytango]

Nope. 20 times. Then divide by 10.
Followed directions of post #11 in link and came up with exactly 43 shaft revs per 20 tire revs.
If you try it let me know what you come up with, please.

Yeah I think I read somewhere that you do it 20 times because it's an open diff. If it was a locked diff then you'd only spin 10 times. This kind of made sense to me.

 

[krenaud33]

The chart over at SS has never let me down. I don't have any faith in a yard telling me the ratio over the phone especially with 3rd gens. I believe their software is more accurate for 2nd gens though. Get on car-part.com you will find a bunch of 4.56 elockers listed, too bad they aren't accurate. isu2014 called all over only to find out the ones listed were V6 4Runners which of course never received 4.56 gears. I was going to go the 4.56 route too since I have a 4.56 front collecting dust so I called around and I also came up empty handed.

The SS chart shows I have 4.30, if Ryan called all the local places on car-part I just as well forget about it.

 

[KidVermicious]

I could see it if you turned the wheel 10 times and got 43 drive shaft revs...

Nope, you're not factoring in how the diff itself works. With one wheel on the ground and stationary, it takes the other wheel twenty revolutions to equal ten axle revolutions, which in slapdappy's case is 43 driveshaft revolutions.

 

[KidVermicious]

The SS chart shows I have 4.30, if Ryan called all the local places on car-part I just as well forget about it.

If it really is an elocker diff, $300 is a steal regardless of the axle ratio. But junkyards know what these things are worth, I bet there's something wrong with it.

 

[jgue467]

I'd think it make significant climbs into a more efficient/effective rpm to operate at, i'm thinking the climb from denver on i70 headed west, pretty wicked on either side of those rockies! On these 3.4s it matters i think. :cowboy:

 

[krenaud33]

I'd think it make significant climbs into a more efficient/effective rpm to operate at, i'm thinking the climb from denver on i70 headed west, pretty wicked on either side of those rockies! On these 3.4s it matters i think. :cowboy:

I would think so. I will be headed that route in a month. I have never taken my 3rd gen 4Runner on this route before but i have been thru the rockies a few times so I know it is difficult.

 

[xcmtb83]

If it really is an elocker diff, $300 is a steal regardless of the axle ratio. But junkyards know what these things are worth, I bet there's something wrong with it.

I have bought a few elockers and noone at the yard knew the difference. IMO I think it really depends on how popular wheeling and Toyotas are in whatever state.

 

[slapdappy]

I would think so. I will be headed that route in a month. I have never taken my 3rd gen 4Runner on this route before but i have been thru the rockies a few times so I know it is difficult.

I suggest you turn off O/D for anything but downhill. I sometimes drop gearshift into 2nd for longer higher altitude ascents, i.e. vail pass, eisenhower tunnel, etc.
Also, max tire psi.

 

[krenaud33]

I suggest you turn off O/D for anything but downhill. I sometimes drop gearshift into 2nd for longer higher altitude ascents, i.e. vail pass, eisenhower tunnel, etc.
Also, max tire psi.

Thanks for the suggestions, I will definately turn the O/D off and make sure the tires are at max PSI.

 

[citykid]

Here's a dumb question. If I change out the gearing to a different number, I'd have to do the same with the front diff also, right?

 

[JayRolla]

Here's a dumb question. If I change out the gearing to a different number, I'd have to do the same with the front diff also, right?

Yes. You need to swap gears matching front and back