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Speedo problem

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  #31  
Old 03-08-2012, 09:05 AM
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Originally Posted by NumberDummy
When looking up the correct drive (output shaft) and driven (end of the cable) speedo gears in the 1980/89 truck parts catalog, three things must be known.

Axle ratio, trans type and tire size. How many 1980's F350's (or F250's) came with factory installed 215/85/16, 235/85/16 or any other size of P-Metric radial? NONE!

If I knew what the 235 tires on your truck cross referenced to the original tire size, then I can give you the info.
I know the 235 were not the original.

However I got the original size from the door sticker. This truck I believe was an original chassis cab truck it that makes a difference.

Here is a picture of the door sticker.



Originally Posted by NumberDummy
But even with this, the speedo will not be 100% accurate, because P-Metrics are a different shape than the original bias ply polyester and non P-Metric radials that were factory installed.
100% is not required at all. I'd like to be within 2-3 mph if I can. This way when I loan the truck to a friend he will know if he's speeding.

Thank you for your help with this.
 
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  #32  
Old 03-08-2012, 09:56 AM
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Speedo problem
hadfield, the first part of your VIN, 2FTJW35L is exactly the same as mine, if you look right underneath that it says "truck" your truck was a complete F350 crew cab DRW just like mine except 85 rather than 86 and a 4 speed instead of a C6. Here is the label form mine.
 
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  #33  
Old 03-08-2012, 11:51 AM
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Series code (first 3 digits of the VIN): 2FT = FoMoCo of Canada LTD - Complete Vehicle // Type-GVW: W353 = F350 2WD Crew Cab, 10,000 GVWR.

Parts catalog does not list any 215 or 235 tires for the 3.54-1 ratio, so I need the equivalent size, example: 8.00-16.5.
 
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  #34  
Old 03-08-2012, 12:24 PM
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Bill, can you get him in the ballpark using my truck's information but with his transmission? My label and his both show the LT metric tires, or should it be tyres since they are both Canadian built. LT215 is an 8.50-16 as near as I can determine and LT235 would be a 9.25-16. I can pull my old C6 driven gear and get a tooth count if that will help.
 
Last edited by 85lebaront2; 03-08-2012 at 12:24 PM. Reason: typo
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  #35  
Old 03-08-2012, 12:32 PM
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Originally Posted by NumberDummy
Series code (first 3 digits of the VIN): 2FT = FoMoCo of Canada LTD - Complete Vehicle // Type-GVW: W353 = F350 2WD Crew Cab, 10,000 GVWR.

Parts catalog does not list any 215 or 235 tires for the 3.54-1 ratio, so I need the equivalent size, example: 8.00-16.5.

from the online tire size calculator
 
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  #36  
Old 03-08-2012, 03:00 PM
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Just wanted to get on here and say Thanks to everyone for the help and a BIG thanks to NumberDummy for the parts numbers and vendors.

Got the gear and snap ring ordered. Carpenter had both, $39.99 to my door.

Thanks again.
 
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  #37  
Old 03-11-2012, 07:09 PM
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Number dummy anything?
 
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  #38  
Old 03-11-2012, 07:54 PM
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I think he had plans for the weekend; some sort of SoCal FTE GTG yesterday, and he's been dealing with contractors working on his house.

That, and he sleeps *weird* hours........
 
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  #39  
Old 03-16-2012, 12:51 PM
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Bump this to the top. I actually ordered 3.73's.

I may be close with my larger than stock tires and lower (numerically gears.)

Number dummy can you assist in this please? Thanks.
 
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  #40  
Old 03-16-2012, 12:57 PM
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Don't get your hopes up. ND/Bill hasn't been on the forum for over 4 days. I'm hoping all is well.
 
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  #41  
Old 03-16-2012, 04:58 PM
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Originally Posted by Gary Lewis
Don't get your hopes up. ND/Bill hasn't been on the forum for over 4 days. I'm hoping all is well.
I'm sure he'll be back eventually. I'm not tearing my tranny apart for a week or so.
 
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  #42  
Old 03-16-2012, 07:32 PM
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Originally Posted by kedwinh
Carpenter had both, $39.99 to my door.
That place (Dennis Carpenter Ford) is right down the road from me. I keep wanting to go by there but haven't yet. That's the extent of my contribution to this discussion!

Good going kedwin, I'l be interested to know what your mpg are once you have the odometer reading right.
 
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  #43  
Old 03-16-2012, 08:58 PM
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Maybe ND finally got around to looking at the Christmas present I sent him.
 
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  #44  
Old 03-16-2012, 10:03 PM
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Originally Posted by Galendor
That place (Dennis Carpenter Ford) is right down the road from me. I keep wanting to go by there but haven't yet. That's the extent of my contribution to this discussion!

Good going kedwin, I'l be interested to know what your mpg are once you have the odometer reading right.
Kind of hoping that the MPG will be about the same. I figured it on GPS speed and mileage not the speedo because it was so far off.
 
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  #45  
Old 03-19-2012, 07:52 PM
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So as I was driving it we used my buddys GPS and figured with the tire size increase I am reading 10% low. So if it say 50 it's actually 55.

When we pull the tranny I'll get the original gear info off it. Then once it's regeared I'll do it again with the gps and figure where I need to go.
 
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