Gears Question
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Freshman User
Joined: Nov 2007
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Gears Question
I have a 92 f250 with a 7.3L with a auto electric overdrive don't know wat type.
And I want to know wat kind of gears I have. How can I check ?
also can I change the gears from a gasser what choices do I have
I don't do much trailor pulling just looking for better Gas millage, I do alot of highway driving
And I want to know wat kind of gears I have. How can I check ?
also can I change the gears from a gasser what choices do I have
I don't do much trailor pulling just looking for better Gas millage, I do alot of highway driving
Lead Driver
Joined: Nov 2003
Posts: 6,900
Likes: 3
From: Campbell River, B.C.
There are a few ways to figure this out.
You can take the axle code of the door tag and some one here can decode it.
or
Post your tach readings at say, 60 mph, and again we can help you figure it out (also need tire size)
or
This is the messiest way, but the most reliable. Take the differential cover off and count the number of teeth on the ring gear and the pinion gear. Then divide the number of teeth on the ring gear by the number on the pinion, round the result to 2 decimal places, and thats your gear ratio.
You can take the axle code of the door tag and some one here can decode it.
or
Post your tach readings at say, 60 mph, and again we can help you figure it out (also need tire size)
or
This is the messiest way, but the most reliable. Take the differential cover off and count the number of teeth on the ring gear and the pinion gear. Then divide the number of teeth on the ring gear by the number on the pinion, round the result to 2 decimal places, and thats your gear ratio.
Posting Guru
Joined: May 2003
Posts: 1,242
Likes: 3
From: Joliet, Illinois
Originally Posted by David85
There are a few ways to figure this out.
You can take the axle code of the door tag and some one here can decode it.
or
Post your tach readings at say, 60 mph, and again we can help you figure it out (also need tire size)
or
This is the messiest way, but the most reliable. Take the differential cover off and count the number of teeth on the ring gear and the pinion gear. Then divide the number of teeth on the ring gear by the number on the pinion, round the result to 2 decimal places, and thats your gear ratio.
You can take the axle code of the door tag and some one here can decode it.
or
Post your tach readings at say, 60 mph, and again we can help you figure it out (also need tire size)
or
This is the messiest way, but the most reliable. Take the differential cover off and count the number of teeth on the ring gear and the pinion gear. Then divide the number of teeth on the ring gear by the number on the pinion, round the result to 2 decimal places, and thats your gear ratio.
And 3.55:1 is the tallest they offered as far as I know.
Moderator
Joined: Jan 2001
Posts: 56,999
Likes: 2,747
From: Virginia
Originally Posted by archangel
Why not just tell him to read the tag on the axle cover?
And 3.55:1 is the tallest they offered as far as I know.
And 3.55:1 is the tallest they offered as far as I know.
I redid a 351c and it must have been completely stock with no work done to it, because near the coil on top of the engine was a metal tag that told the year an everything. When I hopped it up with a aluminum manifold, etc. I put that tag right back on under that bolt. I thought someone someday may appreciate knowing what engine they had.
Lead Driver
Joined: Nov 2003
Posts: 6,900
Likes: 3
From: Campbell River, B.C.
Originally Posted by Franklin2
I tell people that all the time, but there seems to be a tag bandit or something. They all go look and the tag is gone. I don't know why mechanics can't put the tags back on.
