Highboy speedometer correct
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Post Fiend
Joined: Oct 2009
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From: town of less than 200 ppl
Highboy speedometer correct
I ordered a set of turbine wheels for my highboy and some 37" hummer tires to match them. I need to know how I am going to correct my speedometer. Surely with all of the people out there running these tires, someone has corrected their speedometer. If I am understanding all of my findings, then a 16 tooth driven gear is the fastest gear offered by Ford. How close would that get me to being accurate? Searching has been nearly fruitless for me.. Any help would be greatly appreciated.
Truck is a '74, has 4.10 gearing, np205 xfer case, and an np435 4-speed.
Truck is a '74, has 4.10 gearing, np205 xfer case, and an np435 4-speed.
Moderator & parts slinger
Joined: Feb 2007
Posts: 50,247
Likes: 5,815
From: S/W Missouri, Polk county
Do you see the blue line with User CP, Albums, FAQ? See the search on that line?
It has a drop down search menu arrow, go to the "Advanced Search" option, type in there say "blab la bla" and then go to the lower right column and high light 73-79 forum.
Select it and then you will have a detailed search just in the 73-79 forums.
Post #4, and in here https://www.ford-trucks.com/forums/1...ease-read.html
And here is a great one
https://www.ford-trucks.com/forums/1...libration.html
It has a drop down search menu arrow, go to the "Advanced Search" option, type in there say "blab la bla" and then go to the lower right column and high light 73-79 forum.
Select it and then you will have a detailed search just in the 73-79 forums.
Post #4, and in here https://www.ford-trucks.com/forums/1...ease-read.html
And here is a great one
https://www.ford-trucks.com/forums/1...libration.html
Thread Starter
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Post Fiend
Joined: Oct 2009
Posts: 8,674
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From: town of less than 200 ppl
Telling me how to search, after telling you that searching has proven to be useless does what exactly? Thanks for nothing..
hoffy, I know that I have to swap out my driven gear, and the fastest gear offered from anyone is a 16 tooth gear... that is why I asked how closely a 16 tooth gear would get my speedometer....
spikinfool, I ordered my tires from Tucson, AZ.
hoffy, I know that I have to swap out my driven gear, and the fastest gear offered from anyone is a 16 tooth gear... that is why I asked how closely a 16 tooth gear would get my speedometer....
spikinfool, I ordered my tires from Tucson, AZ.
Moderator & parts slinger
Joined: Feb 2007
Posts: 50,247
Likes: 5,815
From: S/W Missouri, Polk county
Did you even bother to click on the very informative links I posted? FYI I got one of the links by using the advanced search.....
If I had the exact answer to your question I would of posted it. But since I did not I thought I would at least try to be helpful and give you some helpful advice to maybe find the answer, with your reply, guess it was not.
Hope it works out for you.
Cargo Master
Joined: Oct 2010
Posts: 2,339
Likes: 32
From: Lost In a Pit of Despair
There are still a few out there. Humvee tires being one option. But for the most part, they're all north of the 37" range
I'll keep an eye on this, because I'll be getting some 35's in the near future and will be interested in knowing the answer
-Jameson
I'll keep an eye on this, because I'll be getting some 35's in the near future and will be interested in knowing the answer
-Jameson
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