Speedo Re-calibration
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Senior User
Joined: Dec 2010
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Speedo Re-calibration
Just came home with new 285-75-16's. I want to re-calibrate for the larger tires. Can someone point me in the right direction? My 1999 has an analog odo and trip I don't know if this matters. Anyone done the recal.?
Elder User
Joined: Jun 2007
Posts: 705
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From: Sandia Park, NM
I'm think you can do it with AutoE. Not a bad investment for other reasons too!
Logistics Pro
Joined: Jun 2005
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From: AZ
Post Fiend
Joined: Aug 2010
Posts: 13,710
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From: Manchester, CT
With that size tire you really dont need to recalibtrate. I have a GPS app on my iphone and i have 285/75/16 on my truck and at 70 it reads exactly 70. Now with the 35s on my old truck when i was doing 65 it was actually 70
Hotshot
Joined: Jul 2008
Posts: 12,782
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From: N.GA Mountains
What he said ^^^^^^^^ 
Stock 265 tires ~32" dia and 285's ~33" dia.
But, if ya find speedo is off - it can be fixed with AE!
Stock 265 tires ~32" dia and 285's ~33" dia.
But, if ya find speedo is off - it can be fixed with AE!
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Laughing Gas
Joined: Mar 2008
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From: coquitlam,BC
It can be done with AE. Where are you located?
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Hotshot
Joined: Jul 2008
Posts: 12,782
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From: N.GA Mountains
They all have analog gauges and they all get a digital signal from PCM. PSD's don't have speedo cables!
PSD's don't have speedo cables!
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Senior User
Joined: Dec 2010
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It can be done with AE. Where are you located?
Thread Starter
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Senior User
Joined: Dec 2010
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PM sent. I want to know that everything is reading true...it's a peace of mind thing. Also I have read it will adjust shift points etc. to the tires size. The truck does seem to downshift a bit more, but I have only driven it twice with the new tires...ya know blizzard and all