Speedometer gears
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Have a Ford dealer nearby?
Go there and ask to see this illustration, it's the SAME one that's in the 1964/72 parts catalog.
1980/89 FORD LIGHT TRUCK PARTS CATALOG / ILLUSTRATION SECTION A70.3, PAGE 3 / Lower pic.
I cannot scan and post, that's why I'm passing this info along. Most dealers will have this parts catalog.
You could also contact FTEpartsguy.com and ask him to send you a copy.
Uh...you want the charts that list all the drive/driven gears?
Boy oh boy, are you in for a surprise...just wait to you take a gander at those charts...there are literally PAGES of them...P-A-G-E-S!!
When you finally find the correct charts, you will see a little black dot next to the drive gear part numbers that when you go to the bottom of the pages to figure out what that black dot refers to....says use with spacer.
Go there and ask to see this illustration, it's the SAME one that's in the 1964/72 parts catalog.
1980/89 FORD LIGHT TRUCK PARTS CATALOG / ILLUSTRATION SECTION A70.3, PAGE 3 / Lower pic.
I cannot scan and post, that's why I'm passing this info along. Most dealers will have this parts catalog.
You could also contact FTEpartsguy.com and ask him to send you a copy.
Uh...you want the charts that list all the drive/driven gears?
Boy oh boy, are you in for a surprise...just wait to you take a gander at those charts...there are literally PAGES of them...P-A-G-E-S!!
When you finally find the correct charts, you will see a little black dot next to the drive gear part numbers that when you go to the bottom of the pages to figure out what that black dot refers to....says use with spacer.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
#1) this IS NOT CORRECT actually fits between the drive gear and the output shaft bearing retainer.
THIS IS CORRECT: Yoke, yoke splined flange, oil seal, output shaft bearing retainer, drive gear, drive gear spacer, output shaft bearing snap ring, output shaft bearing.
I typed the sequence wrong initially.
When I looked at the pic again, I realized my mistake, edited but forgot to edit what I typed in line #1.
I edit a LOT! It's a good idea to read my posts again, because when the brain kicks in, I add additional info.
There's a one hour time limit to edit your posts here on FTE.
Last edited by NumberDummy; Mar 6, 2009 at 04:17 PM. Reason: I added additional info....again.
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Bill That's what I thought, and that is the way it got put together, and is working (so Far) I also went to the local dealer, Holder Ford, and after some resistance, they printed out a diagram of an 82 F-250 tailshaft area, and it was the same sequence. So many thanks again. I understand the Brain Fade, I live with it every day. Mike
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Thanks for this thread, Number Dummy you have helped a great deal in my replacement of the driven gear. Thank you. I have a 68 f250 with C6, the metal driven gear you identified above: O1T17271D .. 21T. The original had a group of 5 broken teeth - gone, so I was able to find a new one based on your suggestions. However when trying to put the new gear in, it does not want to go all the way in. I have tried moving around the drive shaft etc to see if I can get it to wedge in to the drive gear. Is there a trick to getting a new one to go in? When I did think I had it in, I screwed down the retaining bolt and it does not go all the way in to seat properly. Can't figure out why it won't go in. Thanks.
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Hi Bill/Nummerdummy,
Thanks for all the help in various posts! I have a question on the C6 drive gear. I have the same trans as described in this thread, have the 21 tooth metal driven gear, and slide on drive gear. Speedo cable is on passenger side, bolt on yoke. When replacing the drive gear I'm not sure if it should be notched so it fits in the shaft grooves? Or will the clip kind work? Should it be metal or plastic? Having a hard time finding the right drive gear. It had a chevy th400 drive gear which didn't work, someone put in before I bought truck so I'm not sure what goes in there. Thanks.
Thanks for all the help in various posts! I have a question on the C6 drive gear. I have the same trans as described in this thread, have the 21 tooth metal driven gear, and slide on drive gear. Speedo cable is on passenger side, bolt on yoke. When replacing the drive gear I'm not sure if it should be notched so it fits in the shaft grooves? Or will the clip kind work? Should it be metal or plastic? Having a hard time finding the right drive gear. It had a chevy th400 drive gear which didn't work, someone put in before I bought truck so I'm not sure what goes in there. Thanks.
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Drive gear question
Bill, ratio is 373. I think I may have figured it out last night. As I tighten the yoke, it bears down on the drive gear but not enough. Found in another post of yours that I was missing a washer, or two to get it to tighten in there a little better and spin on the shaft. Is that correct? My original assumption was that the drive gear needed teeth to hold into the shaft grooves or a clip, which I think now is wrong. Can you confirm? Also, last, would be good to find the correct drive gear, like I said PO claims the current gear in there is for a th400.
Hotshot
Joined: Mar 2013
Posts: 14,255
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From: Phoenix, Az.
Bill, ratio is 373. I think I may have figured it out last night. As I tighten the yoke, it bears down on the drive gear but not enough. Found in another post of yours that I was missing a washer, or two to get it to tighten in there a little better and spin on the shaft. Is that correct? My original assumption was that the drive gear needed teeth to hold into the shaft grooves or a clip, which I think now is wrong. Can you confirm? Also, last, would be good to find the correct drive gear, like I said PO claims the current gear in there is for a th400.
EDIT. "Drive" gear.
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Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
1968/72 C6's came with a separate DRIVE gear. 1973 and later C6's have the DRIVE gear made as part of the output shaft.
Upper pic: 1968/72 / Lower pic: 1973/79.
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Thanks Bill and Mike, Good to see a chart with part numbers - thanks! Now the million dollar question is who has this gear? I've been calling the numbers you (Bill) listed on other threads. No luck so far. I used a micrometer, it is exactly 1 3/8" diameter. I also confirmed this week by a 40 year Ford truck mechanic that the C-6 in my truck is the heavy duty version, with bolt on yoke, and separate drive gear (steel, not plastic). Has a steel driven gear as well, which I have. Was told this trans was common on the motor home chassis that Ford helped produce.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
NOS PARTS LTD in Waxahachie TX has 1 = 972-937-2201.
No Ford dealer, no other obsolete parts vendor has any.
However, if this is a 1968 F250 Camper Special, due to the size of the (original) wheels, 3.73 ratio, it would use the 7 tooth 8J17285 DRIVE gear.
There are 41 of these puppies available NOS
btw: The were no motor home 'chassis' available until 1973. M450/500's assembled/sold (very poorly) 1973/76. I've only seen one in person.
1969/74 E100/300 (Econolines) are unit bodies. One piece welded chassis/body w/a stub frame to bolt the engine/trans to.
Ford offered an E300 "Cut-Away." Cut the cargo van body off behind the front seats, so that Class C motor home, box van and etc. bodies could be installed.
Actor Clayton Moore (The Lone Ranger) had a E300 Class C motorhome, was a frequent visitor to Ralph Williams Ford in Encino. He liked to come by and chit-chat with anyone.
I've got a pic of the two of us standing beside his motor home. Of course he's wearing the mask, I don't think he ever took it off, even when sleeping!
No Ford dealer, no other obsolete parts vendor has any.
However, if this is a 1968 F250 Camper Special, due to the size of the (original) wheels, 3.73 ratio, it would use the 7 tooth 8J17285 DRIVE gear.
There are 41 of these puppies available NOS
btw: The were no motor home 'chassis' available until 1973. M450/500's assembled/sold (very poorly) 1973/76. I've only seen one in person.
1969/74 E100/300 (Econolines) are unit bodies. One piece welded chassis/body w/a stub frame to bolt the engine/trans to.
Ford offered an E300 "Cut-Away." Cut the cargo van body off behind the front seats, so that Class C motor home, box van and etc. bodies could be installed.
Actor Clayton Moore (The Lone Ranger) had a E300 Class C motorhome, was a frequent visitor to Ralph Williams Ford in Encino. He liked to come by and chit-chat with anyone.
I've got a pic of the two of us standing beside his motor home. Of course he's wearing the mask, I don't think he ever took it off, even when sleeping!
New User
Joined: Mar 2015
Posts: 12
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NOS PARTS LTD in Waxahachie TX has 1 = 972-937-2201.
No Ford dealer, no other obsolete parts vendor has any.
However, if this is a 1968 F250 Camper Special, due to the size of the (original) wheels, 3.73 ratio, it would use the 7 tooth 8J17285 DRIVE gear.
There are 41 of these puppies available NOS
btw: The were no motor home 'chassis' available until 1973. M450/500's assembled/sold (very poorly) 1973/76. I've only seen one in person.
1969/74 E100/300 (Econolines) are unit bodies. One piece welded chassis/body w/a stub frame to bolt the engine/trans to.
Ford offered an E300 "Cut-Away." Cut the cargo van body off behind the front seats, so that Class C motor home, box van and etc. bodies could be installed.
Actor Clayton Moore (The Lone Ranger) had a E300 Class C motorhome, was a frequent visitor to Ralph Williams Ford in Encino. He liked to come by and chit-chat with anyone.
I've got a pic of the two of us standing beside his motor home. Of course he's wearing the mask, I don't think he ever took it off, even when sleeping!
No Ford dealer, no other obsolete parts vendor has any.
However, if this is a 1968 F250 Camper Special, due to the size of the (original) wheels, 3.73 ratio, it would use the 7 tooth 8J17285 DRIVE gear.
There are 41 of these puppies available NOS
btw: The were no motor home 'chassis' available until 1973. M450/500's assembled/sold (very poorly) 1973/76. I've only seen one in person.
1969/74 E100/300 (Econolines) are unit bodies. One piece welded chassis/body w/a stub frame to bolt the engine/trans to.
Ford offered an E300 "Cut-Away." Cut the cargo van body off behind the front seats, so that Class C motor home, box van and etc. bodies could be installed.
Actor Clayton Moore (The Lone Ranger) had a E300 Class C motorhome, was a frequent visitor to Ralph Williams Ford in Encino. He liked to come by and chit-chat with anyone.
I've got a pic of the two of us standing beside his motor home. Of course he's wearing the mask, I don't think he ever took it off, even when sleeping!