Author Topic: gear ratio to tire size  (Read 4259 times)

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toyotamobing

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gear ratio to tire size
« on: Feb 29, 2008, 06:58:24 PM »
im woundering what the ideal gear ratio to tire size is??? for example im running 33s with 4.88...good? bad? and for other gear ratios like 4.10, 4.56, 4.88, 5.29...ect.
1996 Tacoma 3rz auto 4x4
1993 Jeep XJ 2 door 5spd 4cyl 4x4
1996 Dodge 3500 12V 5spd 4x4

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jimbo74

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Re: gear ratio to tire size
« Reply #1 on: Feb 29, 2008, 07:01:48 PM »
4.10s good for 31s

4.56s good for 31-33s

4.88s good for 33-35s

5.29s good for 35s+

5.71s good for 35s+ with more torque

this is generally for the toyota crowd

domestic trucks use a whole different system....
:usa:

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toyotamobing [OP]

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Re: gear ratio to tire size
« Reply #2 on: Feb 29, 2008, 07:13:25 PM »
so im geared properly for my 33s. would this put me close to stock ratio?
1996 Tacoma 3rz auto 4x4
1993 Jeep XJ 2 door 5spd 4cyl 4x4
1996 Dodge 3500 12V 5spd 4x4

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jimbo74

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Re: gear ratio to tire size
« Reply #3 on: Feb 29, 2008, 07:16:10 PM »
4.88s with 33s is good
:usa:

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toyotamobing [OP]

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Re: gear ratio to tire size
« Reply #4 on: Feb 29, 2008, 07:41:25 PM »
ok and what about having a welded carrier?
1996 Tacoma 3rz auto 4x4
1993 Jeep XJ 2 door 5spd 4cyl 4x4
1996 Dodge 3500 12V 5spd 4x4

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Redbeard1

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Re: gear ratio to tire size
« Reply #5 on: Feb 29, 2008, 08:12:22 PM »
nothing wrong till the welds break...
 
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Re: gear ratio to tire size
« Reply #6 on: Feb 29, 2008, 08:28:54 PM »
completely differant gearing than domestics haha
read and comment :whip:

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Hammerhead

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Re: gear ratio to tire size
« Reply #7 on: Feb 29, 2008, 08:49:08 PM »
4.10s good for 31s

4.56s good for 31-33s

4.88s good for 33-35s

5.29s good for 35s+

5.71s good for 35s+ with more torque

this is generally for the toyota crowd

domestic trucks use a whole different system....
jimbo is right on for a 22r  :yesnod:

completely differant gearing than domestics haha
My 350 on 38.5s is just right with 4.11s  :gap:
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Re: gear ratio to tire size
« Reply #8 on: Feb 29, 2008, 08:54:04 PM »
exactly, my blazer is running 3.08's with 33"s with a 327 gasser, great setup.
read and comment :whip:

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jrock

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Re: gear ratio to tire size
« Reply #9 on: Feb 29, 2008, 08:54:38 PM »
gotta love them tiny engines.

GDubb5150

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Re: gear ratio to tire size
« Reply #10 on: Mar 01, 2008, 11:41:45 AM »
Isn't there a method for checking gear ratios by marking the drive shaft and then rotating the tire and counting how many turns one or the other makes in relation to the other?  I would like to figure my ratio out but dont remember the specifics.  Does this make any sense or am I way off base?  :dunno:
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jrock

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Re: gear ratio to tire size
« Reply #11 on: Mar 01, 2008, 12:44:57 PM »
That makes sense. Rotate the drive shaft until the tire does a full rotation and count the rotations of the drive shaft. But this will only give an estimate for the ratio, it will be difficult to find the decimal. Check your vin#, if the third is stock, it'll tell you.

hollywood_toy90

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Re: gear ratio to tire size
« Reply #12 on: Mar 01, 2008, 05:34:48 PM »
there is a code in your door jam that will tell you too!

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Re: gear ratio to tire size
« Reply #13 on: Mar 01, 2008, 06:00:11 PM »
yes gdubb you can do that, its the number of driveshaft rotations to 1 rotation of the wheel. like mentioned before though it will only give you a rough number, not the exact ratio.
read and comment :whip:

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twistedtoy92

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Re: gear ratio to tire size
« Reply #14 on: Mar 01, 2008, 06:48:35 PM »
or you can remove the DL from the third and the end of the pinion gear shaft is color coated, pink is 4.10, green is 4.30, i mix up the rest   :headscratch:
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toyotamobing [OP]

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Re: gear ratio to tire size
« Reply #15 on: Mar 02, 2008, 10:14:36 PM »
now what about the acuracy of the speed-o
1996 Tacoma 3rz auto 4x4
1993 Jeep XJ 2 door 5spd 4cyl 4x4
1996 Dodge 3500 12V 5spd 4x4

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Duffil

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Re: gear ratio to tire size
« Reply #16 on: Mar 02, 2008, 10:55:37 PM »
with 33s and 4.88s, according to GPS on my nextel my truck is within 2-3 MPH of the speedo.

Blingn

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cam011

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Re: gear ratio to tire size
« Reply #18 on: Mar 05, 2008, 05:41:10 PM »
or you can remove the DL from the third and the end of the pinion gear shaft is color coated, pink is 4.10, green is 4.30, i mix up the rest   :headscratch:
I don't trust this method myself, I pulled apart an e-locker 3rd with 4.30 gears and it had pink paint on the pinion nut. It seems to work on the early ones though, maybe Toyota changed their color designations.

toyotamobing [OP]

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Re: gear ratio to tire size
« Reply #19 on: Mar 05, 2008, 06:16:40 PM »
how hard is it to swap the pinion flanges??? my front third is a different bolt pattern and size
1996 Tacoma 3rz auto 4x4
1993 Jeep XJ 2 door 5spd 4cyl 4x4
1996 Dodge 3500 12V 5spd 4x4

@alteredegospeedshop

MAKING A SLOW TRUCK GO FAST SINCE 2003

!!POLY GOATS!!
www.polygoats.com

POLY PERFORMANCE
www.polyperformance.com

 
 
 
 
 

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