I've got a weird (at least to me) problem with my speedometer gear... I've searched and looked through several speedometer gear threads and most are how many teeth or what gear do I need - I didn't see anything like this...

It's a '62 F100 with the light-duty three speed transmission - I've got a new cable & gear, the driving gear in the transmission is clean and in good shape in the tranny and the speedo head is in good shape. The speedometer works perfectly for about 6~7 miles and then starts to bounce a bit and then it quits (the gear is disengaging the cable in the tranny).

The gear just slips off of the cable insert and stays in the end of the cable. If I pull out the cable and reset the gear it works fine for another 6~7 miles and quits again.

I pulled the drive cable out of the sheath and cleaned the gear oil off and the gear oil out of the end of the housing thinking maybe it was forcing it out as the gear spun - no luck...

I'm confused - looking at the drawings in the shop manual the gear and cable are the right parts, and its all assembled correctly. Anyone had this happen before?

I'm thinking about using silicone to "glue" the gear to the drive cable in the housing and see if that has enough strength to hold the gear in place.

Anyone had this problem? Is there a part missing from the trans/cable? Is this why ford went to the style of cable with the c-clip?

Tyson

 

There should be a clip or pin of some type holding the cable in the gear. These guys will give you the information you are looking for.

http://www.transmissioncenter.net/sp...n_______va.htm

 

Shop manual does not show there being a 'c' clip holding the gear to the cable shaft; however, seem to recall, almost certain, when replaced cable on light duty 3 speed on 65 F100 there was a clip securing gear to the cable assembly. Once removed I was able to pull the cable shaft from housing and insert the new. In addition, there should be a felt insert/washer, inside housing where the cable is secured at dash, rec. lightly grease.

dave

 

I'll take some digital pics of the cable gear this evening, but here's a link that has a good drawing of the gear types:

www.johnsf100.com/5766shop/cat76.htm

I'm not associated with John's - its just an easy reference...

The newer gears have a clip that slips through the gear and engages a slot machined into the end of the spedo cable housing. (cable B, gear E)

The 57-62 gear slips into the end of the speedo cable housing, with nothing to hold it in place (or so it seems). (cable A, gear D)

Even if there is supposed to be a clip or a pin I have no idea where it would go...

Tyson

 

there's no clip to hold the gear on these early trans, they just slip on the end of the cable and a boss on the inside of the trans that the face of the gear butts against keeps it from slipping past the drive gear, it sounds like your cable is too short... did you replace it with an exact length cable or use a universal one that you cut to size?

 

I was wondering if it was supposed to hit something inside of the tranny... Looking in the tailshaft housing it dosen't appear that there is anything for the driven gear to ride on.

I have the correct cable/gear for a '62 from Carpenter...

I'm really beginning to wonder if perhaps I have the wrong cable... The truck is definately a '62, and the part numbers on the head/block are C1xx so it is a 61/62 engine. I need to crawl under there and see if perhaps someone switched out the trans sometime in the trucks life with a '63 or newer.

The original cable was in the truck when I bought it, but there was no driven gear. Perhaps the gear was missing because it wouldn't stay on the end of the cable and someone just removed it. Anyone know if the early and late cable ends are the same diameter? Maybe I should try fitting a newer cable/gear to the trans.

Tyson

 

May want to call DC 'tech' line and inquire. (704) 786-8180. They may have an online tech forum where one can email question.

dave

 

theres a possibility someone put a later trans in, I can't remember exactly when the cable design changed, I thought it was '65, but may have been earlier...the best I remember is the hole in the tailshaft for the cable housing remained the same after the change..been a while since I've done trany swaps but I remember having to change to the later cable one time

 

Pic in the parts book clearly shows a retainer clip. It's a wire clip similar to a old style door handle clip, but smaller. Part number was 8A 17292 . It fits all 3 speeds in the car line as far back as 1949. THe trucks started in 1959 using this clip.There's a slot on the back end of the gear and a groove in the speedo cable housing for it to lock into.

Here's 2 places that have them.

Antique auto, Arlington, Tx. 1-817- 275-2381 qty 7 in stock.

Miller Obsolete, Vestal, NY 1-800-546-7278 qty 1 in stock

Call and give the part number and ask for price. THis should solve the speedo problem.

Barry

 

HEY Barry, thats interesting!!! but I have had several cars and trucks from the 50's and 60's and non of them had clips or a place to install one..I just had the cable out of my 1960 to change the Oring and it doesn't have a clip or any grove to put one that I saw, now I'll have to pull it out and look again

 

I scanned a pic from my parts books, but for the life of me, can't figure a way to get it onto this site. I know I need to upload it somewhere first then down load it. I'm not the brightest bulb when it comes to these computers. Anyne who knows how to do this, please tell me how in plain english. I guess I neeed a step by step lesson.

Barry

 

Barry, Upper left corner User CP click on it, then Edit Gallery
follow prompts. Once you have uploaded your images, you can tell the guys "In my gallery" you can find........

John

 

Application:

1957-1962 F100-250 with light duty 3 speed; or O/D transmission

PART NUMBER:

B7AZ-17292-A clip speedometer cable mounting .350" I.D.


*** *** *** ***

Incorrect (no malice intended)

8A-17292 is listed for 1958/1963 F-750/1000's only.

Information found on page # 1796 of the Ford Truck Parts Book 1957-1963.

 

Thats what I was wondering - I didn't get a chance to crawl under the truck and look at the part number on the housing, but I'll try today...


And, no insult or hard feelings, but if some of you would have clicked on the link in my earlier post:

There is a great image of the various cable ends and gears available.

There is clearly a clip on what I'm calling the newer style (and older depending on the line). I've changed these gears before ('71 F100).

Its the "57-62" style that should fit my truck that dosen't have a clip (at least an obvious one). If someone switched the tranny for a later unit (what I'm starting to believe now) I need a later cable, gear & clip.

Anyone know if the clip is available locally? I have a gear (misorder) and I know I can get a newer speedo cable at a parts house. I guess I need to get out a caliper and measure the hole and hit the parts house and compare.

Tyson

 

C1DD-17292-A "C" type, steel .665"/.685" O.D. - .330"/.345" I.D.

Note: Ford changed the suffixes of 1000's of part numbers in the 1980's when they repackaged items that originally came as one, into multiple packages of 5, 10 etc.

The suffix (A) of that number may have changed as a result.

Trans case should have either casting/engineering numbers on the case, or a removable metal tag somewhere. (Don't be surprised if it's missing....they usually are).

Tyson...all the later tranny's used the plastic gear...the axle ratio will determine the number of teeth. Your local Ford parts dept should stock that clip...and the gear, also.