4.10 speedometer drive gear
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4.10 speedometer drive gear
i changed the the rear in my 90, f350, 5 speed, diesel to 4.10 but no the ford dealer can not tell me which speedometer drive gear to put in.
i hope someone can tell me either the part #, color or number of teeth to keep my speedometer from reading over 85 on the highway. thanks rick
i hope someone can tell me either the part #, color or number of teeth to keep my speedometer from reading over 85 on the highway. thanks rick
Last edited by superiorrick; Dec 11, 2006 at 08:59 AM. Reason: typo
Post Fiend
Joined: Nov 2003
Posts: 21,285
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From: Nutter Fort, WV
superiorrick,
Welcome to FTE and the IDI diesel forum.
Although I can't tell you the correct color, I can tell you it is not teal green, that one has my speedo right on the money with 285 tires and 3.55 gears.
Welcome to FTE and the IDI diesel forum.
Although I can't tell you the correct color, I can tell you it is not teal green, that one has my speedo right on the money with 285 tires and 3.55 gears.
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dave,
i have read somewhere that if your speedometer was accurate before the swap you can divide the old ratio into the new one and multply the answer by the number of teeth on the old one and it will tell you how many teeth the new one should have.
example: 4.10 divided by3.55 equals 1.15. 1.15 multiplied by 16 teeth equals 18.48.
so you can try an 18 or 19 tooth gear either one will be closer than what you had.
this is more than our local ford dealer could tell me.
thanks for the reply. i appreciate it.
i have read somewhere that if your speedometer was accurate before the swap you can divide the old ratio into the new one and multply the answer by the number of teeth on the old one and it will tell you how many teeth the new one should have.
example: 4.10 divided by3.55 equals 1.15. 1.15 multiplied by 16 teeth equals 18.48.
so you can try an 18 or 19 tooth gear either one will be closer than what you had.
this is more than our local ford dealer could tell me.
thanks for the reply. i appreciate it.
