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05-27-2012, 09:31 PM
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#1 |
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Member
My Rig: '87 4Runner
Join Date: Jun 2011
Location: Colorado
Posts: 31
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Speedometer question (1st gen 4Runner)
Last year I bought a '87 4Runner on 37" tires with 5.29 gears and the speedo was reading faster than I was driving according to my GPS. The odometer was also off the same % as the speed. I have gone down a tire size and am now running 35" tires and of course its now off more.
From what I remember from my last Toy is that 5.29 gears and 35" tires is roughly the same as stock, 4.11 gears and 235 tires. At least that's how it was on the '85 PU that I had. Is there a speedo gear that can be changed to correct the speedometer or is there possibly something wrong with my speedometer? It has the W56 tranny, dual cases with, what I think is the original t-case, as the rear case. FWIW, I'm not sure that the speedometer assy or the drivetrain is the original one. Don't know if that would make a difference. Any thoughts? Thanks |
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05-29-2012, 09:11 AM
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#2 |
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Veteran Member
My Rig: 1998 4runner 4x4
Join Date: Dec 2005
Location: Twentynine Palms, CA
Posts: 814
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There's an actual calculator for speedo combined with gear ratios and then tire size. Google it and you will find it. The best and surest way is to take a trip to your local police station and just tell them what's up. I'm pretty sure that they would be willing to gun you and tell you what you are actually going (within 3 at least) and then you can adjust from there.
__________________
Semper Fidelis 1998 4cyl 5spd 4 Runner 1982 mini 4x4 Slowly learning one repair at a time |
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05-30-2012, 07:27 PM
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#3 |
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Newbie
Join Date: Sep 2011
Posts: 22
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http://forum.ih8mud.com/79-95-toyota...-change-2.html
read both pages. Takes 20 minutes to swap em out. Thread has all the necessary part numbers. just have to do a little math |
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06-05-2012, 07:13 PM
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#4 |
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Newbie
Join Date: Apr 2012
Location: Centennial,CO
Posts: 9
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I run the same setup still with 37"s and the speed guns around town read me correctly..
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06-06-2012, 08:21 PM
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#5 |
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Newbie
Join Date: Sep 2011
Posts: 22
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search ih8mud theres a great 2 page thread with speedo gear part numbers
Last edited by jeetS; 06-07-2012 at 06:20 PM. |
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06-07-2012, 07:21 AM
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#6 |
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Member
My Rig: '87 4Runner
Join Date: Jun 2011
Location: Colorado
Posts: 31
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I guess I should have worded my question better. What I need to know is if you can change speedo sensor gears to correct the speedometer and if there is a Toyota specific guide for that.
I know that my speedometer is off, reading about ~10% fast. |
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06-07-2012, 06:22 PM
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#7 | |
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Newbie
Join Date: Sep 2011
Posts: 22
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Quote:
if you click on the link that I posted first and read that thread, you will find all the info need for changing the speedo GEAR. It is VERY easy. located at the back of the trans directly before the output shaft/driveshaft connection. |
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06-08-2012, 10:14 PM
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#8 | |
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Forum Warden
My Rig: '85 One Ton 4Runner
Join Date: Oct 2004
Location: Trinity Bay, TX
Posts: 4,545
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Quote:
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"Get busy living or get busy dying, that's goddamn right." ~ Ellis Boyd 'Red' Redding
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