gear ratio code question
09-07-2004, 11:30 AM
#1
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Thread Starter
gear ratio code question
hey all! Using Steve's site info:
http://fastq.com/~sschaefer/Toyota_axle_codes.html
vzn185L-GKPGKA - my code points me to 4.100 with my 16"s w tha 265/70/r16's
so, what the heck is the 4.300 option?
and how do i achieve 4.300!?>!?
and....would 4.300 be nice ratio w/ 33's? or am I assbackwerds?
thanks!
Aaron
http://fastq.com/~sschaefer/Toyota_axle_codes.html
vzn185L-GKPGKA - my code points me to 4.100 with my 16"s w tha 265/70/r16's
so, what the heck is the 4.300 option?
and how do i achieve 4.300!?>!?
and....would 4.300 be nice ratio w/ 33's? or am I assbackwerds?
thanks!
Aaron
09-07-2004, 11:44 AM
#2
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I switched to 4.30 from 4.10 and I definitely noticed the difference. But I only have 265/75/16's (32's?)
Best way to test if you are unsure is to crawl under and count the revolutions of the shaft as someone spins the tire around.
The 4.30 option was just that, an option. I was lucky enough to find a donor rig for my e-locker swap that had the 4.30 gearing. Otherwise you are gonna have to crack into the 3rd member to change it, and if you do that, you might as well get 4.56's or 4.88's.
Best way to test if you are unsure is to crawl under and count the revolutions of the shaft as someone spins the tire around.
The 4.30 option was just that, an option. I was lucky enough to find a donor rig for my e-locker swap that had the 4.30 gearing. Otherwise you are gonna have to crack into the 3rd member to change it, and if you do that, you might as well get 4.56's or 4.88's.
09-07-2004, 01:34 PM
#3
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Thread Starter
Thanks Christian....so, the only way I'll KNOW for sure if i have the 4.30 option is if i get under there and check...which, I'll be under there in the upcoming weeks to change my dif's, transfer and oil...so, I guess I'll give it a good look then. That would be 4.3 rotations? correct....or???
Å
Å
09-07-2004, 09:02 PM
#5
Contributing Member
if you have an open diff, leave one tire on the ground and spin the other tire 2 revolutions to get the ratio, if your locked jack both up and spin them once 
09-09-2004, 05:04 AM
#6
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Thread Starter
hey joe....!
I'm not sure I follow....why 2 revolutions to get the ratio? why not one? fill me in here bro!
ä
I'm not sure I follow....why 2 revolutions to get the ratio? why not one? fill me in here bro!
ä
Last edited by amorphous; 09-09-2004 at 05:13 AM.
09-09-2004, 05:38 AM
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Aaron-
Jim helped me on this a while back; it is two revolutions:
Jim helped me on this a while back; it is two revolutions:
Originally Posted by Albuquerque Jim
It's not 100% accurate, but it should work. If you have access to both trucks, there is the "spin and count" method:
Block the tires at one end of the vehicle to keep it from rolling, and then jack up a tire on the other end.
Place the transmission in neutral and release the parking brake.
Spin the tire exactly TWO full revolutions while at the same time counting exactly how many revolutions the driveshaft spins (marking the driveshaft and tires beforehand will make it easier to count revolutions).
The number of revolutions the driveshaft spins is your gear ratio.
If it spins just over 4 times, then the ratio is probably 4.10;
If it spins 4-1/3 = 4.30;
If it spins 4-1/2 = 4.56;
If it spins just under 5 = 4.88;
If it spins 5-1/3 = 5.29, etc.
If you have both trucks there you should easily be able to tell if they are both the same ratio or not.
Block the tires at one end of the vehicle to keep it from rolling, and then jack up a tire on the other end.
Place the transmission in neutral and release the parking brake.
Spin the tire exactly TWO full revolutions while at the same time counting exactly how many revolutions the driveshaft spins (marking the driveshaft and tires beforehand will make it easier to count revolutions).
The number of revolutions the driveshaft spins is your gear ratio.
If it spins just over 4 times, then the ratio is probably 4.10;
If it spins 4-1/3 = 4.30;
If it spins 4-1/2 = 4.56;
If it spins just under 5 = 4.88;
If it spins 5-1/3 = 5.29, etc.
If you have both trucks there you should easily be able to tell if they are both the same ratio or not.
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