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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Adjusting speedo

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Old May 11, 2022 | 03:55 PM
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Adjusting speedo

I've searched all over and can't seem to find anything for the bullnose. I'm gonna be putting 35's on my truck after I lift it but was wondering how to adjust the speedo if possible.
 
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Old May 11, 2022 | 04:03 PM
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You will have to pull the gear out of the transmission or transfer case and see how many teeth are on it. Then put a gear with less teeth on it. You just pull the cable out of the tranny or transfer case, the gear is on the end.
 
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Old May 11, 2022 | 04:26 PM
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You may want to wait on the speedo gear change till you change out the front & rear gear set for something like 4.56
Dave ----
 
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Old May 11, 2022 | 07:42 PM
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To make big changes, a ratio adapter box will be required.

I need to get one after swapping from 3.55 to 4.56. Speedometer needs to be slowed down 17% and that's too much for a simple gear change.
 
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Old May 11, 2022 | 08:17 PM
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Originally Posted by Mwcrf450r
was wondering how to adjust the speedo if possible.
Oh, it's possible, but in my experience, I was a lot more comfortable after switching to a swimsuit with a more generous cut. No matter how I'd adjust my Speedo, it was always too tight in front and kept climbing in back.

Welcome to the forum, by the way.
 
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Old May 12, 2022 | 06:57 AM
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Originally Posted by Franklin2
You will have to pull the gear out of the transmission or transfer case and see how many teeth are on it. Then put a gear with less teeth on it. You just pull the cable out of the tranny or transfer case, the gear is on the end.
awesome thanks!
 
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Old May 12, 2022 | 06:59 AM
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Originally Posted by kr98664
Oh, it's possible, but in my experience, I was a lot more comfortable after switching to a swimsuit with a more generous cut. No matter how I'd adjust my Speedo, it was always too tight in front and kept climbing in back.

Welcome to the forum, by the way.
Thanks wise guy glad to be here. Been creeping for a long time finding info
 
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