Speedo cable driven gear color code
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Speedo cable driven gear color code
 
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Hi Gentlemen!
I want to replace the speedo driven gear and I'm a bit confused about what to order...  Here is Big Bro's one, gray, 18 tooth:   Table shows that "gray" gear is part C7SZ-17271-B:  But googling this number gives me anything but the gray. Well, almost, since I get one "gray" result on eBay, 75$ US plus shipping!!  Amazon shows a "gray" result, 25$ CAD shipping included, but with a different number (C7SZ-17271-C):  .
Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022. Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel. |
Re: Speedo cable driven gear color code
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Re: Speedo cable driven gear color code
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In reply to this post by BigBrother-84
I think the Amazon one is what you want. Amazon is listing the Identification # not the Part #. The Part # you want is C7SV-B but according to the 2nd chart the ID # is C7SV-C, which is what Amazon shows.
Don't ask me why the upper chart shows a different ID #. Maybe Ralph knows?  
Gary, AKA "Gary fellow": Profile
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
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Re: Speedo cable driven gear color code
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C7SZ-17271-B was replaced by C7SZ-17271-C
Info Thanks to Bill AKA: Numberdummy. 
Truck: 1981 F-150 Explorer / Engine: 300-6 California MCU Feedback System / Trans: T-18 - 4 speed / 2.75 Ford Rear Axle Open Diff.
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Re: Speedo cable driven gear color code
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Thanks, Ralph!
Gary, AKA "Gary fellow": Profile
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
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Re: Speedo cable driven gear color code
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This post was updated on .
Thanks Gentlemen!
The Amazon one looks pretty identical to Big Bro’s. Which is a bit worn, not so much, 18T, same angle direction:  Now, about the speedo drive gear… In your experience, is it stronger than the driven gear, so this latter will worn before the drive gear does? Or, too bad man, you have to replace the two gears? If so, can we trust the table, so Big Bro’s speedo drive gear should be white, part #E3TZ-17285-C: 
Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022. Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel. |
Re: Speedo cable driven gear color code
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Administrator
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Re: Speedo cable driven gear color code
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That would be logical that the easiest part to reach and replace is the more "fragile" one...
But sometimes mechanic is fascinating but not logical.  I'll see if replacing only the driven gear fixes my "jumping" needle. 
Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022. Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel. |
Re: Speedo cable driven gear color code
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Re: Speedo cable driven gear color code
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In reply to this post by BigBrother-84
If the gear doesn't look bad then I'd lube the speedo cable. Yours is loooooong and can easily wrap & unwrap in that length if dry, and that'll cause all sorts of twitchyness on the speedo. I had fits with this on Big Blue, and what I finally did that solved the problem was to run Mobil 1 wheel bearing grease in the cable. That tamed, but didn't completely eliminate, the twitchyness.
I think we may have had this "conversation" before, and if so please forgive my forgetfulness.
Gary, AKA "Gary fellow": Profile
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
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Re: Speedo cable driven gear color code
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Re: Speedo cable driven gear color code
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Re: Speedo cable driven gear color code
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In reply to this post by Gary Lewis
Ok, let’s suppose I’ll have to replace the drive gear, just for fun.
Question 1: Is this as easy as this? Look much easier than when the cable is attached to the transmission.  Question 2: How to identify the right replacement drive gear? I suppose the drive gear located in a transmission is different than the one located in a 4x4 transfer case? Question 3: How to identify my TC? 
Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022. Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel. |
Re: Speedo cable driven gear color code
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Yes, it was as easy as that for me. But make 100% sure you get that nut tight enough as it is what sandwiches the drive gear between two parts and if the nut isn't tight the gear will slip. DAHIK.
 You can pull the driven gear out and look at the drive gear through the hole. That should tell you what you have, color wise. But counting the teeth is an art. As for the t-case, it looks like Big Blue's twin so you have a BW1345. Look closely in the wedge-shaped recess next to the rear output opening and you'll find it says Borg Warner 13-45.  
Gary, AKA "Gary fellow": Profile
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
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Re: Speedo cable driven gear color code
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Ok, confirmed: Drive gear needs to be replaced, kaput.
BTW, you're right Gary, my TC is a BW1345.  I need advices: 1- What color is the gear? What part number to buy?  2- What other parts to order? What will I need? Seals, rings, oil, etc. 3- Is there a step by step «how to for noobies» somewhere? Draining oil, unscrew this, support that, etc. 😉 Willing to go ahead, but don't want to stupidly break anything. And since I'm presently not close from any store, I want to be well prepared.
Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022. Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel. |
Re: Speedo cable driven gear color code
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I think the color is green. Looks to be the same as mine.
I don't think we have a step-by-step, but I did record how I did it to some extent in this post. That shows pics of the gear as well as a tool I made to hold the yoke in order to torque the nut back on. And you can find the torque at Documentation/Driveline/Transfer Cases and the BW1345 tab and then either the Ford's Repair Procedures or Borg-Warner Service Manual tab. And this chart seems to say the gear has 6 teeth, which is what I count on mine although some have said I can't count. 
Gary, AKA "Gary fellow": Profile
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
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Re: Speedo cable driven gear color code
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On my monitor it looks blue.
Monitors do not show colors as an exact. Hue variations can happen etc... So take what I say with a grain of salt. I'd count the teeth and/or see if you can't get a engineering number off of it.
Truck: 1981 F-150 Explorer / Engine: 300-6 California MCU Feedback System / Trans: T-18 - 4 speed / 2.75 Ford Rear Axle Open Diff.
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Re: Speedo cable driven gear color code
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Driven gear question:
As you can see in my picts, the original cable Driven Gear has a long shaft. Everywhere I look, the driven gears for automatic transmission have a long shaft. Those for manual transmission have a short shaft...  Is this explained by the fact that Big Bro is 4x4 and its driven gear is installed in the transfer case? Should we understand that driven gears for AT or TC have a long shaft?
Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022. Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel. |
Re: Speedo cable driven gear color code
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Administrator
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On our page at Documentation/Driveline/Speedometer Gears & Cables you can see the illustration shown below, which is from the Driven Gear tab. As you can see, you are looking at the Type 2 and Type 2a. And then if you scroll down on that page you'll see that the transmission is shown on the left.
The Type 2 appears to use PN C7, C8, or C9xx, which the Type 2a uses C0, C1, C2, C3, or C4xx. And, sure enough, the Type 2 seem to be used for automatic transmissions and 2a for manual transmissions. 
Gary, AKA "Gary fellow": Profile
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
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Re: Speedo cable driven gear color code
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This post was updated on .
Well, well, well…
I just picked up the replacement TC (BW 13-45) rear shaft seal at the nearest NAPA. Really not sure they sold me the good part. This is the new I got:   And here are some pictures grabbed on YouTube:    They are absolutely not looking the same. Can someone tell me if I have the correct replacement part on hand?
Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022. Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel. |