YotaTech Forums  

Go Back   YotaTech Forums > Toyota SUV & Truck Tech > 86-95 Trucks & 4Runners
Sign in using an external account
Register Forgot Password?
Search


86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Welcome to Yotatech!
Welcome to Yotatech,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
LinkBack Thread Tools Search this Thread
Old 08-17-2013, 02:00 PM   #1
Registered User
Personal Sales Rating: (0)
 
Gamefreakgc's Avatar
 
Join Date: Sep 2012
Location: Roseville, CA
Posts: 1,172
Too high of gears? 91 4x4 M/T, confused...

So, I've got an interesting situation that I can't make sense of. The sticker says that stock, I'm supposed to have 225/75 R15 tires (which I do, for now) and that I've got G254 gears (4.56).

Here's the part I'm confused on. I know that the previous owner had 31's on it, since the spare is a 31. However, those aren't stock according to my doorjamb. Recently, I've noticed that my odometer was running a little high compared to my GPS and Google Maps and it turns out it's right, when the speedometer reads 70 MPH (highway speed) I'm actually going only 64 MPH! Also, my engine revs at 3200 RPM at "70". From here to my parent's house it's 91 miles, but my odometer will read 100.

Here's what the door jamb says so you know I'm not going crazy.

Click the image to open in full size.

So... anyone know what size gears I actually have? Or did stock gears read high straight off the factory floor? Is there any way to check?

P.S. And on a final note... that means my MPG is only 15 city and 20 highway . I thought I was getting 16.5 city and 22 highway... still at 33% improvement over when I got it but the high numbers were fun to brag about...
This ad is not displayed to registered members.
Register your free account today and become a member on Yotatech!
__________________
'98 4Runner SR5 - 4x4 Supercharged (lots of plans) - 191k miles
'91 Pickup SR5 XTRA Cab- 4x4 3VZ-E 3.GO - 288k miles

Mods to date:
  • Magnaflow Muffler - 20% increase in MPG & noticeable gain in HP
  • 7MGE VAFM swap- Removed due to old engine not adapting to more air flow
  • Flamethrower injectors, better low end torque.
  • K&N Air Filter
Gamefreakgc is offline   Reply With Quote
Old 08-17-2013, 02:31 PM   #2
Registered User
Personal Sales Rating: (0)
 
uniformFoxtrot's Avatar
 
Join Date: Apr 2012
Location: Oregon
Posts: 55
Try looking at the color dot on the pinion if its yellow they are a 4:56 ratio
pink = 4.10
orange = 4.11
blue = 4.30
green = 4.38
yellow = 4.56
white = 4.88
__________________
92' Pickup (sold)
93' Pickup with 5vz powa!

Pavement princess phase ended soon as I bought it!!
uniformFoxtrot is offline   Reply With Quote
Old 08-17-2013, 03:02 PM   #3
Registered User
Personal Sales Rating: (0)
 
Gamefreakgc's Avatar
 
Join Date: Sep 2012
Location: Roseville, CA
Posts: 1,172
I read that the dot isn't always accurate either especially if suspect that gears have been changed (4crawler.com).

Speedo converter
Original Tire Diameter: 31 (what used to be on there)

New Tire Diameter: 28.3 (225/75 R15)

Speedometer Reading (MPH): 70

Corrected Speed (MPH): 63.9

Taken from this site: http://www.jtoutfitters.com/pages.php?cID=2&pID=11

Does this mean my truck was made for 31"s and my doorjamb lies? If it helps at all, I run at 3200 RPM at "70" (really 64 MPH).
__________________
'98 4Runner SR5 - 4x4 Supercharged (lots of plans) - 191k miles
'91 Pickup SR5 XTRA Cab- 4x4 3VZ-E 3.GO - 288k miles

Mods to date:
  • Magnaflow Muffler - 20% increase in MPG & noticeable gain in HP
  • 7MGE VAFM swap- Removed due to old engine not adapting to more air flow
  • Flamethrower injectors, better low end torque.
  • K&N Air Filter
Gamefreakgc is offline   Reply With Quote
Old 08-17-2013, 03:15 PM   #4
Registered User
Personal Sales Rating: (1)
 
Join Date: Mar 2013
Location: Mobile, Alabama
Posts: 1,737
If your truck has 28in tires and 3200rpm at 64mph it works out to 5.07 gear ratio if your transmission is in 5th (0.83). Your tach could be off also but I wouldn't think that much
__________________
1992 4runner 4x4 SR5 V6 Auto. Soon to have 5.3L
DD 2008 Chevy Colorado Extended cab 2wd
2001 Chevy 2500HD Duramax/Allison 4x4
JasonYota is online now   Reply With Quote
Old 08-17-2013, 03:17 PM   #5
Registered User
Personal Sales Rating: (1)
 
Join Date: Mar 2013
Location: Mobile, Alabama
Posts: 1,737
31 in tires at actually 70 equals out 5.07 gear ratio also.
__________________
1992 4runner 4x4 SR5 V6 Auto. Soon to have 5.3L
DD 2008 Chevy Colorado Extended cab 2wd
2001 Chevy 2500HD Duramax/Allison 4x4
JasonYota is online now   Reply With Quote
Old 08-17-2013, 03:21 PM   #6
Registered User
Personal Sales Rating: (0)
 
Join Date: Mar 2009
Location: Woodward, Oklahoma
Posts: 156
My door jamb info looks just like yours, however, I have 456 g254 gears and 31s. I was told that they imported our trucks with smaller tires because the tariff was cheaper and installed larger tires after they got here. I dont know that for sure, thats what a dealer told me. He also told me they imported all of our trucks without ac and installed it over here to save money. Mine is a 90 sr5 v6. I was also told that mine wasnt imported as an sr5, that most of the add ons was done here and that kinda makes sense looking at the door info and I know mine was sold new with 31s. He told me that most trucks were imported as base models because of the cheaper tarriff, and basically remanufactured here. That would explain the door info being right on the gears and wrong on the tires. Im not putting this out as gospel, this is what a dealer who is a friend of mine told me. Hope this helps.....
fdp101452 is offline   Reply With Quote
Old 08-17-2013, 03:25 PM   #7
Registered User
Personal Sales Rating: (0)
 
maachine's Avatar
 
Join Date: Feb 2011
Location: Hammond, LA
Posts: 320
recently i bought a bluetooth OBD 2 adapter and an app for my phone that shows computer info. i've found that my GPS and the torque app reads differently from my speedometer. both read up to 3-4 MPH different than my speedometer shows. my truck is stock. so honestly i trust the actual speedometer more than anything
__________________
'02 Tacoma 4 door 2WD TRD 3.4L
'87 Dodge W-150 4WD 5.2L My fun truck
'08 Harley Nightster 1200cc
maachine is offline   Reply With Quote
Old 08-17-2013, 03:33 PM   #8
Registered User
Personal Sales Rating: (0)
 
Gamefreakgc's Avatar
 
Join Date: Sep 2012
Location: Roseville, CA
Posts: 1,172
Quote:
Originally Posted by fdp101452 View Post
My door jamb info looks just like yours, however, I have 456 g254 gears and 31s. I was told that they imported our trucks with smaller tires because the tariff was cheaper and installed larger tires after they got here. I dont know that for sure, thats what a dealer told me. He also told me they imported all of our trucks without ac and installed it over here to save money. Mine is a 90 sr5 v6. I was also told that mine wasnt imported as an sr5, that most of the add ons was done here and that kinda makes sense looking at the door info and I know mine was sold new with 31s. He told me that most trucks were imported as base models because of the cheaper tarriff, and basically remanufactured here. That would explain the door info being right on the gears and wrong on the tires. Im not putting this out as gospel, this is what a dealer who is a friend of mine told me. Hope this helps.....
That would make sense. It's not worth regearing going from 225/75R15 to 31's, that's why I'm so baffled by all this.

I double checked the accuracy of the GPS by comparing with my wife's '11 Nissan Altima. GPS said 70, Speedometer read 70.
__________________
'98 4Runner SR5 - 4x4 Supercharged (lots of plans) - 191k miles
'91 Pickup SR5 XTRA Cab- 4x4 3VZ-E 3.GO - 288k miles

Mods to date:
  • Magnaflow Muffler - 20% increase in MPG & noticeable gain in HP
  • 7MGE VAFM swap- Removed due to old engine not adapting to more air flow
  • Flamethrower injectors, better low end torque.
  • K&N Air Filter
Gamefreakgc is offline   Reply With Quote
Old 08-18-2013, 08:20 AM   #9
Registered User
Personal Sales Rating: (0)
 
highonpottery's Avatar
 
Join Date: Aug 2007
Location: Citrus Hts., CA
Posts: 2,092
From how your speedo is reading higher than actual speed it sounds correct that you are geared lower for the tires you're running. It's good for low end power and city/trails but not ideal for highway trips. I personally would mess with gears, I would just swap to 31" tire which should balance everything out- also fills out the wheel wells more without any rubbing anywhere. 31s can be found all day long on CL used. Also you have a good selection of new tires in this size since its so common for stock SUVs to come with them. Price is significantly less than what a 33+ costs these days.
highonpottery is offline   Reply With Quote
Old 08-18-2013, 01:24 PM   #10
Registered User
Personal Sales Rating: (0)
 
Join Date: Jun 2013
Location: Iowa
Posts: 151
SLVRmongoose
My truck is a DLX. Door jam says 225/75r15 has had 31/10.50r15 since new. Speedometer reads spot on. Spare tire and factory tires had 31's aftermarket extra's also had 31's. So I would say put 31's on and it should be good.
__________________
.Chaser.

1991 Toyota Excab DLX 22RE 4WD
1992 Toyota Stdcab Base 2WD
1995 Toyota 4Runner SR5 3.0 4WD
http://i1272.photobucket.com/albums/...ps87ac265b.png
Chaser Johndoe is offline   Reply With Quote
Old 08-18-2013, 02:17 PM   #11
Registered User
Personal Sales Rating: (0)
 
Stetson_md's Avatar
 
Join Date: Nov 2012
Location: florida
Posts: 693
Thishttp://www.yotatech.com/f116/mechani...l-pics-195986/
__________________
1984 4x4 yota rusto-mod/first truck project
22r
G52 5speed
Looks like crap runs like diarrhea

2005 Dodge Dakota crew cab 4wd
3.7l auto

South Florida yota group
https://m.facebook.com/groups/216227588538949
Stetson_md is offline   Reply With Quote
Old 08-18-2013, 02:19 PM   #12
RSR
Registered User
Personal Sales Rating: (0)
 
Join Date: Mar 2013
Location: Central TX
Posts: 961
You've got 4.56 gears, which is the gearing for the 31" tire package with manual trannies. The autos w/ 31" package got the 4.88s.

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

The bottom half of this page has several other fyis for gearing etc: http://www.yotatech.com/f116/horribl...51/index2.html
__________________
93 3VZE SR5 Xtra Cab 4x4 A/T
-Downey 3" Rear Leaf Springs & Bilstein HD Shocks
-OME Steering Damper, Deeza Tie Rod Ends, Sankei 555 Idler and Pitman Arms
-31x10.5r15 Michelin LTX A/T 2 Tires with OEM Alloy Wheels, Aisin Manual Hubs, IFS
-Factory 4.875 Gearing, Front Diff ADD Delete
-Rhino Lined Bed, ARE Bed Cap
-90915-20004 Resin Oil Filter w/ Castol Edge Ti 5w30 Full Syn, Factory Oil Cooler
-Amsoil Syn Fluids
-Alarm and other security measures ;-)
RSR is offline   Reply With Quote
Old 08-18-2013, 03:57 PM   #13
RSR
Registered User
Personal Sales Rating: (0)
 
Join Date: Mar 2013
Location: Central TX
Posts: 961
Quote:
Originally Posted by fdp101452 View Post
My door jamb info looks just like yours, however, I have 456 g254 gears and 31s. I was told that they imported our trucks with smaller tires because the tariff was cheaper and installed larger tires after they got here. I dont know that for sure, thats what a dealer told me. He also told me they imported all of our trucks without ac and installed it over here to save money. Mine is a 90 sr5 v6. I was also told that mine wasnt imported as an sr5, that most of the add ons was done here and that kinda makes sense looking at the door info and I know mine was sold new with 31s. He told me that most trucks were imported as base models because of the cheaper tarriff, and basically remanufactured here. That would explain the door info being right on the gears and wrong on the tires. Im not putting this out as gospel, this is what a dealer who is a friend of mine told me. Hope this helps.....
I'm pretty sure you're spot on. My door sticker reads the 225 tires too, yet has 31" package when purchased new -- they ordered/built based upon final specs for stuff like diffs but did some conversions for $ savings once arrived here (I think in 90 or so the 2wd trucks were nearly all American made... I'm sure wikipedia would tell you, haha). Much of the SR5 stuff like the rearview mirror with map lights has wiring preinstalled on all trucks -- I think -- for easy swap in, etc, based upon what a lot of standard option folks are finding on some of the junkyard mods with SR5 components... The SR5 cluster just requiring a different oil pressure sending unit, etc. The stock speaker systems are easily swappable w/ SR5 components, etc (though I don't think there's wiring for rear compartment speakers unless the SR5 package was ordered however).
But to the options and whatnot by year, I find the sales brochures super informative: http://www.toyotareference.com/truck
__________________
93 3VZE SR5 Xtra Cab 4x4 A/T
-Downey 3" Rear Leaf Springs & Bilstein HD Shocks
-OME Steering Damper, Deeza Tie Rod Ends, Sankei 555 Idler and Pitman Arms
-31x10.5r15 Michelin LTX A/T 2 Tires with OEM Alloy Wheels, Aisin Manual Hubs, IFS
-Factory 4.875 Gearing, Front Diff ADD Delete
-Rhino Lined Bed, ARE Bed Cap
-90915-20004 Resin Oil Filter w/ Castol Edge Ti 5w30 Full Syn, Factory Oil Cooler
-Amsoil Syn Fluids
-Alarm and other security measures ;-)

Last edited by RSR; 08-18-2013 at 07:50 PM.
RSR is offline   Reply With Quote
Old 08-18-2013, 04:37 PM   #14
Registered User
Personal Sales Rating: (0)
 
Gamefreakgc's Avatar
 
Join Date: Sep 2012
Location: Roseville, CA
Posts: 1,172
Thanks guys, mystery solved. My tire treads are almost gone so I'll buy some 31's in the near future.
__________________
'98 4Runner SR5 - 4x4 Supercharged (lots of plans) - 191k miles
'91 Pickup SR5 XTRA Cab- 4x4 3VZ-E 3.GO - 288k miles

Mods to date:
  • Magnaflow Muffler - 20% increase in MPG & noticeable gain in HP
  • 7MGE VAFM swap- Removed due to old engine not adapting to more air flow
  • Flamethrower injectors, better low end torque.
  • K&N Air Filter
Gamefreakgc is offline   Reply With Quote
Old 08-20-2013, 10:23 AM   #15
Registered User
Personal Sales Rating: (0)
 
Innocent Fool's Avatar
 
Join Date: Jan 2005
Posts: 324
Quote:
Originally Posted by fdp101452 View Post
My door jamb info looks just like yours, however, I have 456 g254 gears and 31s. I was told that they imported our trucks with smaller tires because the tariff was cheaper and installed larger tires after they got here. I dont know that for sure, thats what a dealer told me. He also told me they imported all of our trucks without ac and installed it over here to save money. Mine is a 90 sr5 v6. I was also told that mine wasnt imported as an sr5, that most of the add ons was done here and that kinda makes sense looking at the door info and I know mine was sold new with 31s. He told me that most trucks were imported as base models because of the cheaper tarriff, and basically remanufactured here. That would explain the door info being right on the gears and wrong on the tires. Im not putting this out as gospel, this is what a dealer who is a friend of mine told me. Hope this helps.....
That's good info. My 90 SR5 came with every option EXCEPT air. Couldn't figure out why they would load it up with everything except air but the tax situation explains it. It also came with 31's but the sticker says 28's.
Innocent Fool is offline   Reply With Quote
Old 08-20-2013, 10:23 AM
Yotatech
4WD Truck




Paid Advertisement
Reply

Tags
22575r15, 283, 31, 4x4, 91, difference, gps, nissan, pickup, speedometer, truck

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -8. The time now is 06:15 PM.


2010 InternetBrands, Inc.