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Old 01-15-2012, 09:55 PM   #1
1972RedNeck
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Speedometer

The other day when I took my truck on it's first maiden voyage, it felt like I was doing 80 when the speedometer said 70. I took the GPS with me yesterday on my trip to Helena. When I got to 63 mph, I glance over and the GPS says 70. Upon further inspection, my truck has 3.73's instead of 4.10's like I thought.

So, what do I need to do change the speedo gears in my 205 transfer case? Do I have to change the gear on the shaft along with the driven gear? Do they make a speedometer adapter?
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I once pulled an intake manifold for a cam swap... ended up with a full on drag car that ran in the 11's.
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Old 01-15-2012, 10:04 PM   #2
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Re: Speedometer

Go into Bowtieoverdrives site and surf around in there and I believe there is a chart which will give yo the info you need.
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Old 01-15-2012, 10:16 PM   #3
1972RedNeck
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Re: Speedometer

I assume the gears they recommend for a 700R4 fit the 700R4, not the 205, right?
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Quote:
Originally Posted by GASoline71 View Post
I once pulled an intake manifold for a cam swap... ended up with a full on drag car that ran in the 11's.
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Old 01-16-2012, 12:26 PM   #4
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Re: Speedometer

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Originally Posted by 1972RedNeck View Post
I assume the gears they recommend for a 700R4 fit the 700R4, not the 205, right?
All I know is whats on the page and I think tire size and rear end ratio are the two calculations you need. I think you can ordr the gear you need form them as well and if/when you order they should be able to confirm which one you need.
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Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601

" Circumsatances Do Not Change Responsibility "

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Old 01-16-2012, 10:01 PM   #5
1972RedNeck
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Re: Speedometer

So I found this page http://www.transmissioncenter.net/sp...n_______va.htm

Go down to "GM / Dodge / Ford Ratio Adapter". I think I need the top one at 10% if my speedometer reads 63 when I'm going 70. Is this correct? I just want to make sure before I buy.
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1966 F250 4X4 416
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Quote:
Originally Posted by GASoline71 View Post
I once pulled an intake manifold for a cam swap... ended up with a full on drag car that ran in the 11's.
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Old 01-16-2012, 11:37 PM   #6
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Re: Speedometer

Quote:
Originally Posted by 1972RedNeck View Post
So I found this page http://www.transmissioncenter.net/sp...n_______va.htm

Go down to "GM / Dodge / Ford Ratio Adapter". I think I need the top one at 10% if my speedometer reads 63 when I'm going 70. Is this correct? I just want to make sure before I buy.

Can't you just change the driven gear by using the chart near the top of the page? $11.00 compared to $62.00 is quite a difference... Just wondering.

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Old 01-17-2012, 12:03 AM   #7
1972RedNeck
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Re: Speedometer

Yup, good thing I posted on here. Sometimes my eyes are blind.
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Quote:
Originally Posted by GASoline71 View Post
I once pulled an intake manifold for a cam swap... ended up with a full on drag car that ran in the 11's.
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