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1961 - 1966 F-100 & Larger F-Series Trucks Discuss the Slick Sixties Ford Truck

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Old Jun 8, 2019 | 01:35 PM
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Driven Gear

Working through the bugs on our 65 Ranger 352 with COM transmission.

Original "apple cored" driven gear
Put new driven gear in and it "apple cored" within 50 miles. So again speedometer doesn't work. So per our 65 numbers matching thread it was mentioned the drive gear would have to be replaced if it kept apple coring driven gears.
NumberDummy said the Drive Gear is obsolete and none to be found.
So with no Drive Gears available and not replacing Driven Gear every 50 miles, what are our options for a working speedometer?
 
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Old Jun 8, 2019 | 01:54 PM
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I should also mention when the new driven gear did work for the 50 miles or so the speedometer read about 6 miles slower than it should per a couple of radar areas it was driven through.
I don't know the history of the COM but the 352 was rebuilt in the 1990's so maybe the transmission was to. Could it be the wrong driven gear????
 
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Old Jun 8, 2019 | 03:55 PM
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The variation in accuracy is due to tire diameter, it may not be possible to get more accurate for a given tire diameter. It sounds like the drive gear is damaged. Best bet is to find a good used one.
 
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Old Jun 9, 2019 | 02:02 AM
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Originally Posted by Oilboy34
Working through the bugs on our 65 Ranger 352 with COM transmission.

Original "apple cored" driven gear

Put new driven gear in and it "apple cored" within 50 miles. So again speedometer doesn't work.

So per our 65 numbers matching thread it was mentioned the drive gear would have to be replaced if it kept apple coring driven gears.

NumberDummy said the Drive Gear (C5TZ-17285-C) is obsolete and none to be found.
01T-17271-B .. 19T DRIVEN Gear / Marked: 01T-71B-19 / Obsolete

NOS PARTS SOURCE in Olathe KS has 1 = 913-220-5746.

OBSOLETE RELIABLE PARTS in Nashville GA has 1 = 229-686-5101.

There's another on ebay: $38.00 (located in Maine). The applications are the original 1940/47 truck, but this gear fits far more than that.
 
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Old Jun 9, 2019 | 10:39 AM
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Thanks Bill, just bought the driven gear off ebay.
Now find the drive gear I'm assuming that drive gear was used on other ford vehicles with the 352/com?
 
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Old Jun 9, 2019 | 01:19 PM
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Originally Posted by Oilboy34
Thanks Bill, just bought the driven gear off ebay.

Now find the drive gear (C5TZ-17285-C) I'm assuming that 8 tooth steel drive gear was used on other ford vehicles with the 352/com?
Yes...
And was also used with other similar DRIVEN gears (18 thru 22 teeth)..
 
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Old Jun 10, 2019 | 09:03 AM
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Is it possible to switch to a different drive gear/driven gear combo?
 
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Old Jun 10, 2019 | 10:08 AM
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Originally Posted by Oilboy34
Is it possible to switch to a different drive gear/driven gear combo?
You'd have to change the DRIVE and DRIVEN gears to nylon gears.

There are some C4 & MX combinations like this, but the MX tire sizes are different than what your '65 probably has (15") if it's an F100.
 
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Old Jun 10, 2019 | 10:31 AM
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Originally Posted by Oilboy34
Is it possible to switch to a different drive gear/driven gear combo?
If you end up disappointed that you bought the gear off eBay I'll buy it from you.

Chad
 
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Old Jun 10, 2019 | 10:44 AM
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Originally Posted by TA455HO
If you end up disappointed that you bought the gear off eBay I'll buy it from you.

Chad
The problem is that the OP also wants the DRIVE gear (C5TZ-17285-C), no one has any.

When I spotted that DRIVEN gear on ebay, I thought the "price was right."
 
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Old Jun 10, 2019 | 10:55 AM
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Yeah the price was right so we bought it. We are also scouring the internet for drive gear. What would cause the drive gear to wear out and cause problems for driven gear?

What would the c4/mx combo look like part number wise? I don't mind changing to the nylon if replacement parts are available.
Yeah it makes sense speedometer might be slightly off but it would be better than the zero it currently reads.
 
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Old Jun 10, 2019 | 11:15 AM
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Originally Posted by Oilboy34

What would cause the drive gear to wear out and cause problems for driven gear?
It's 54 years old, nothing lasts forever.
 
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Old Jun 10, 2019 | 12:31 PM
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Any idea on the c4 nylon combo?
 
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Old Jun 10, 2019 | 12:42 PM
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Originally Posted by Oilboy34
Any idea on the c4 nylon combo?
I have all kinds of ideas, but don't know if any will work.
 
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Old Jun 11, 2019 | 09:14 PM
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Have you tried to look in the speedo cable hole and rotate the driveshaft to get an idea of what’s wrong with the drive gear?
 
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