Yeah I know, several threads already exist on this issue but my axle codes seem to be really funky. I have a 92' pickup V-6 3.0 5spd manual, stock gears on 33s. The A/TM is B05B. This is where it just doesn't make sense. Everyone keeps saying that I should have stock either 4.10s or 4.56s but none of the code charts I have found on line confirm that. They all say a B=145mm pinion, 05=3.70 ratio and the last digit, the B......well I have only found one site that even lists it as a letter. All I could figure out on that one is, it's supposed to mean 4 pinion open diff. Dealer was absolutely no help. Someone please help me figure out my dilema. Truck runs 2600 RPMs @ 60 mph but won't tow for crap and is a total dog out of the hole. I want to see if the 4.88s will make the difference like everyone suggests but I need to know what I have first. Please help???

 

B05B? I dont think I have ever heard of that ratio. Can you post a pic up of that code? 92 V6 5sp should be a 4.10 ratio.

 

Here is the placard in the door jam.

 

So the truck was built in California.

It could be because you have the ultra-rare Regular cab V6 4x4 DLX.

According to the websites, B05B is 8", 3.15 ratio, 4pinion rear end.


That seems odd to me, since no 4x4 was ever offered with a 3.15 ratio.

 

what web site

 

According to my parts website, there should only be three options, 4.30, 4.56 and 4.88 for the 92 V6 Trucks. Im going to guess you have a 4.30, instead of my previous statement of 4.10. The 4.30 is pretty common (i KNOW its not a 3.15), the 4.56 was mostly found in the Xcab, and the 4.88 is RARE and only found in automatics IIRC.

Ah hell, who really knows. Just take the damn thing out and count the gears lol.

 

various sites with axle code info. I just searched through 15 or so of them, and that was the consensus I was seeing.

Do a google search for Toyota axle code info.

ALSO

The code they teach you to identify Japanese built vehicles does NOT apply to American built, or Canadian built vehicles. Each region has its own setup for codes.

 

I would like to invite all the guys that were helping me on the original thread that started this whole puzzle regarding the towing. Anyway, if I get this right my codes on the door are bogus cause my truck was built in the US prior to 92'. That would be my luck. As far as RPMs, the only thing I have at this point is 2600 RPM @ 60 MPH in 5th with the 33s. I'll have to drive some more and get back with you. I will definitely be trying to attempt the wheel spin trick tonight after work. Please keep scratching your brains though and see if there is something being missed. Still just doesn't make any sense to me to put an axle code on the door that means absolutely nothing??????

 

The search engine on this site is a very powerful tool. This question has been asked and answered here many times. I've answered it three or four times myself. Here's a link to a recent thread that's got lots of info on how to check what your ratio is for sure. No axle code or internet required. Happy reading.

 

I think you had the best answer to this question in the other thread; jack up one rear wheel & count the driveshaft to wheel revolutions....

 

How long have you owned the truck? The axle code will only help if the original gears are still in the truck and a truck that old could easily have been changed out by a PO. My 93 has been changed twice

Looking at your numbers above and assuming your 33" tires are about half worn out (really 32") and with the Toyota R150F tranny the gear calulator here:
http://www.grimmjeeper.com/gears.html shows you have 4.88s.

 

I'm wondering if since it was built in CA, if it uses the same codes as the Tacos...

 

Is there anyway you can find out your gear ratio with your vin number?

 

recommended:
jack up the rear, mark the U-joind and 3rd member, have someone roll the tire see how many drive shaft revolutions you got from each tire roll. you will need a tape measure and a calculator, thou.

no recommended:

call your local dealer's part dept. give them your VIN ask for replacement 3rd member of your truck.

useless:
call toyota, they don't have this kinda info so they re-directed me to the dealer service dept. foreman who couldn't help me either.

 

bugguy68 did your truck come with add

 

Link to definite answer in post #9 above... No need to guess.

 

Tried the VIN with the dealer, that was a waist of time.

 

Yes the truck is ADD. Obviously I will be attempting the rotation trick when I get a time. The code thing is more a matter of principle right now. I just want to know what the hell it means.

 

X2, the only more sure way is to count the gear teeth, but of course that means removing the 3rd.

 

If it was a Tacoma (also assembled in CA), the codes would be per:
http://www.tacomaterritory.com/wiki/...php/Gear_Codes

Which would be 3.15 ... you're definitely going to have to do the spin and check method, as this is just too unusual.