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

Found weird tach

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Old Mar 2, 2023 | 09:29 AM
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Found weird tach

I was hunting in the junkyard for a trans to put in my 85 just talking some people up and one guy said he spotted a tach for me.

the bullnose dash was wired into a 91 F450 with a bucket on the back and a 7.3 NT.

it had a bullnose interior but an OBS steering wheel

anyone else ever seen something like that? I wired the tach in and it works perfectly for my 300

best part is, the Speedo is 7 digit. Not 5 or 6. And I checked if it was in KM but it’s in MPH. Sucks I have a speedo cable or I’d have used it.

sorry for the long post I’m just confused

tach looks good in my truck
 
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Old Mar 2, 2023 | 12:39 PM
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Per Gary's info, the 4500 RPM tach was for diesel trucks:

https://www.garysgaragemahal.com/tachometers.html

 
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Old Mar 2, 2023 | 04:14 PM
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Originally Posted by kr98664
Per Gary's info, the 4500 RPM tach was for diesel trucks:

https://www.garysgaragemahal.com/tachometers.html
Here’s a pic of mine that was for gas trucks


 
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Old Mar 3, 2023 | 03:51 PM
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Originally Posted by bullnosebuford

anyone else ever seen something like that? I wired the tach in and it works perfectly for my 300

best part is, the Speedo is 7 digit. Not 5 or 6. And I checked if it was in KM but it’s in MPH. Sucks I have a speedo cable or I’d have used it.

tach looks good in my truck
I had one of those 4500 RPM tach's for a while. I pulled it out of a retired 1985 F800 fire truck at a local junkyard! They came on the gas and diesels in the medium duty trucks. This one had a 429 gas engine.

They're a great swap-in for the lower revving 300 inline 6.

The medium duty trucks all had the 6 digit odometers. The Canadian trucks got the 6 digit odometers I believe starting in 1983. From 1980-1982, the km/hr speedometers were 5 digit same as the US/miles ones were all along in the pickups.
 
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Old Mar 4, 2023 | 12:13 PM
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From: Houston
Originally Posted by bullnosebuford
I was hunting in the junkyard for a trans to put in my 85 just talking some people up and one guy said he spotted a tach for me.

the bullnose dash was wired into a 91 F450 with a bucket on the back and a 7.3 NT.

it had a bullnose interior but an OBS steering wheel

anyone else ever seen something like that? I wired the tach in and it works perfectly for my 300

best part is, the Speedo is 7 digit. Not 5 or 6. And I checked if it was in KM but it’s in MPH. Sucks I have a speedo cable or I’d have used it.

sorry for the long post I’m just confused

tach looks good in my truck
As has been stated before, that tach is typically found on diesel trucks.

On the odometer that is a standard odometer with a tenth mile wheel. The cluster I bought for my truck to get a tach ended up having a optional speedometer cluster that has a trip odometer. My original cluster without tach had the plain speedometer without trip odometer.

This is a photo of my speedometer while I was repainting the needles, this shows the trip odometer.


There was also a speedometer with a million mile odometer, these were found in the larger trucks the F450 and larger. They read up to 999,999.9 miles before rolling over, my plan was to swap the odometer wheel into my speedometer as I didnt want to lose the trip odometer. I found out how ever that the wheels look narrower it still was wider than the hundred thousand mile odometer that was standard and would not fit. I still have this NOS unit put up how ever as I have been playing around with the idea of building a '80-'86 flare side mud truck for off roading.


 
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