speedometer and tire size
Thread Starter
|
Senior User
Joined: Jul 2003
Posts: 121
Likes: 0
speedometer and tire size
My truck has the wrong speedometer gear its for 3.55 and my truck has 4.10s. Can anyone tell me how far my speedometer is off with stock size tires? In the near future I'am buying new tires I have had 265-75-16 on my dads truck before so they will fit but will a 285-75-16? Also how will this tire sizes affect my gear ratio and speedometer? Thanks
Lead Driver
Joined: Jan 2005
Posts: 7,782
Likes: 221
From: Huntington Indiana
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
2400 RPM with a four speed and 4.10 gears on 235/85-16 tires would be 55.2 MPH.
2400 RPM with a four speed and 3.55 gears on 235/85-16 tires would be 63.7 MPH.
2400 RPM with a four speed and 4.10 gears on 265/75-16 tires would be 55 MPH.
2400 RPM with a four speed and 4.10 gears on 285/75-16 tires would be 57 MPH.
Yes 285/75-16 tires will fit.
2400 RPM with a four speed and 3.55 gears on 235/85-16 tires would be 63.7 MPH.
2400 RPM with a four speed and 4.10 gears on 265/75-16 tires would be 55 MPH.
2400 RPM with a four speed and 4.10 gears on 285/75-16 tires would be 57 MPH.
Yes 285/75-16 tires will fit.
New User
Joined: Mar 2006
Posts: 15
Likes: 0
I swapped the transfer case in my 1985 F-250 with one out of a junk yard and now my speedo reads about 8 - 10 miles fast at 65. I believe my truck has 4.10 gears. Is it the small plastic gear on the end of the speedo cable that I need to change or something more extensive. Thanks.
Thread
Thread Starter
Forum
Replies
Last Post
78 & 87 Super Cab
1987 - 1996 F150 & Larger F-Series Trucks
6
Nov 19, 2013 07:44 AM
gdfrick122
1999 - 2016 Super Duty
1
Nov 20, 2009 10:37 AM
