the sticker in my door jamb is worn and i cant read the letters/ numbers... and i think i try and get under to count the driveshaft revolutions it wont be accurate...

thanks for any advice...

mokas

 

http://toyota.off-road.com/toyota/ar....jsp?id=274535

http://www.brian894x4.com/Gearratiosanddiffs.html

http://www.4lo.com/4LoCalc.htm

http://home.4x4wire.com/erik/diffs/#v6/turbo

Any of these help?

 

count teeth <-- pun intended

 

been to 1 and 3... 4 is interesting.

thanks for posting those..

sucks i have no door stickers or anything... guess ill just have to count the rotations of the driveshaft?

anyone have drections on how to do that correctly?

more advice?

thanks again!

 

How to get gear ratio by spining tires:


1st - block front tires
2nd - mark driveshaft. I used a peice of tape from the shaft to the 3rd, then cut it so it could move seperate.
3rd - lift up one rear tire
4th - spin lifted tire 20 times
5th - get a friend to count the driveshaft rotations ( I used my video camera)
6th - take number of times driveshaft spun, divide by 10 and you have your gear ration

EX. 41.1 times = 4.11 = 4.10 gears
45.6 times = 4.56 gears

 

The easiest way to figure out what gears you have is to get your rig into 4th gear on the highway - that way you know it's 1-1 ratio (If it's 4th gear on a 5 speed manaul, or 3rd gear on a 4 speed auto) and note various RPM's at various speeds. Record your RPM's at 40 MPH, 45 MPH, 50 MPH, 55 MPH, 60 MPH, etc. Then go online and find the right calculator - plug in your tire size, and your speed at xxxx RPM's and it should tell you roughly what gears you have. In fact if you reported back here what model you have and your speeds and RPM's, someone with a simlar set up might even be able to tell you what gears you have based on what RPM's they are at. Most in here can probably tell you off of the top of their head what RPM's they do at what speeds in certain gears.

 

you just count the number of full rotations correct? how would you see a tenth or a rotation with a piece of tape?

thanks everyone, some good alternatives.

dumbass before me thought it was smart to paint over all the factork identification sitckers... :?

thanks again!

 

Rotating the tires is the most accurate way. Stickers can lie! Speedo's can lie! This is good old fashioned math. The whole point of 20 turns is to factor to the tenth. Just do it!

 

Yes, its pretty much idiot proof, as long as you have sombody to watch it, or set up a camera like I did. I set my camera up, and turned the wheel and said outloud "thats 20" and then I rewound the video, and watched it.

Heres how I did the tape. And yes you can see 1 tenth of a rotation, but its really not nessesary. Even if you get say 45.2 turns that tells you that you have 45.6 gears, since toyot never made a gear like that.

trust us


heres how I set up the tape:

 

Just ignore it. It isn't needed. By rotating the tire twenty times, you're introducing a factor of ten so a tenth of a driveshaft revolution comes to a hundredth of a point of gear ratio and Toyota has no gear ratios that close together that it'll make a difference.

3.90 gears = 39 turns of shaft
4.10 = 41 turns
4.30 = 43 turns
4.56 = approx 45 and a half turns
4.88 = almost 49 turns
etc.

As you can see, by counting only the full turns you will have your answer.

 

thanks for the help everyone!

before i just couldent understand how you could tell a tenth of a turn on the driveshaft. but now i understand that thats not needed.

Thanks Again!

 

Ok I just did this and I came up with 52 and about 3/4 driveshaft turns. Does this sound right? I bought the truck pretty much the way it is and gearing has always confused me.

Rob

 

talk to deathcougar he knows this stuff

 

I like the tape method above, but if you're still uncertain I dug this link up on yotatech looking for info on gearing combos.
http://www.grimmjeeper.com/gears.html

Lots of cool features. If you have a tach you can put in your tire, trans, and t-case specs and try it with the different typical toyota gear sets to see which comes closest to your speeds at a particular RPM.

 

Nothing stock uses a 52 tooth ring gear. I think you need to try that one again, or figure out if you have aftermarket gears.

btw What is the code on your door jamb, rdlsz24?


Mike: call the dealership with your VIN#, and they can tell you your axle code. You could also order a new sticker IIRC.

 

Well my truck is far from factory. It originally had a V6 in it; now it has a 22RE. It has a lift and 33's and can hold 65-70 on the highway in 5th gear, so I'm guessing it's regeared. I guess I will have to count again.

Rob

 

sounds like you have 5.29 gears rdlsz24, which means someone has regeared. usually 5.29 are reccomended for 35s if you have the 5speed but nothing is bad about running 33s.

 

52 and 3/4 (almost 53) means you've got 5.29 gears.

52.75 divided by 10 = 5.275....or 5.29 gears....you counted correctly.

 

Cool thanks guys. The guy I bought this truck from seemed to do things right with this except for the 3" body lift that really isn't needed.

Rob

 

3 inch body lift that's not needed could translate into: he had bigger tires on it at one time...which would account for the 5.29 gears...