WTB: Mechanical speedo drive pinion

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JordanTr
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WTB: Mechanical speedo drive pinion

Post by JordanTr »

As stated. Looking for a mechanical speedo drive pinion. Probable candidates are s12 200sx, 80's hardbody truck, 720 2wd, 280zx, z31 300zx and possibly others.

Lemme know what you have. Thanks :)

Found them new online but was just wondering if there are some kicking around local...

FWIW
Complete pinion assembly (like the one below) with n teeth.
32702-58S17 17 teeth
32702-58S18 18 teeth
32702-58S19 19 teeth
32702-58S20 20 teeth
32702-58S21 21 teeth

Picture for reference.
Image
Last edited by JordanTr on 12 Apr 2013 12:31, edited 1 time in total.
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okayfine
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Re: WTB: Mechanical speedo drive pinion

Post by okayfine »

Are you looking to put this in a KA trans? AFAIK only the one pictured works. I tried the black pinion assembly and the trans wouldn't shift into 1st gear. Replaced it with the red one, changing nothing else, and 1st was accessible again.
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Re: WTB: Mechanical speedo drive pinion

Post by goichi1 »

I might have a few, i'll have to check when I get home, they all should work though....not sure why it wouldn't shift into first with the black one?? that's strange because the gear on the sender is offset to contact the same amount when you slide it into the transmission. It shouldn't affect the shifting of gears.
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okayfine
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Re: WTB: Mechanical speedo drive pinion

Post by okayfine »

I agree, but switched it out and it came back. No idea why. Spriso here says the same thing regarding all the SR swaps he does. IIRC, that's where that picture came from.
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JordanTr
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Re: WTB: Mechanical speedo drive pinion

Post by JordanTr »

okayfine wrote:KA trans? AFAIK only the one pictured works. I tried the black pinion assembly and the trans wouldn't shift into 1st gear. Replaced it with the red one, changing nothing else, and 1st was accessible again.
Like Rich said, it seems like an unrelated problem.

Reading this old thread: viewtopic.php?f=2&t=4416&hilit=ka24de
DatzenMike wrote:Any speedo drive cog from an '80s and later FS5W71B or early FS5W71C D-21 truck will fit where the speed sensor is now. Just remove and replace. Pre '80s cogs won't fit properly. The cogs come in different ratios depending on tire and rear axle ratio but anything will get you going.
Others have said they used ones from other cars such as z31 and 280zx. The part numbers cross to a lot of different vehicles including the 280zx and z31.
The one in my car is from an '86 CA20 200sx. I swapped a 19T cog for a 20T cog to get my speedo accurate and I had no issues.
goichi1 wrote:I might have a few, i'll have to check when I get home, they all should work though....
Thanks Rich.
okayfine wrote:Spriso here says the same thing regarding all the SR swaps he does. IIRC, that's where that picture came from.
Hopefully he will chime in. I'm only tossing around part numbers in my basement and comparing it with what I know.
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Sealik
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Re: WTB: Mechanical speedo drive pinion

Post by Sealik »

I have a blue one....looking for a 21 tooth/purple

16 Tooth Cog (Yellow) - 3.36 diff ratio
PN 32703-78100

17 Tooth Cog (Black) - 3.54 diff ratio
PN 32703-78101

18 Tooth Cog (Blue) - 3.70 diff ratio
PN 32703-78102

19 Tooth Cog (White) - 3.90 diff ratio
PN 32703-78103

20 Tooth Cog (Red) - 4.11 diff ratio
PN 32703-78104

21 Tooth Cog (Purple) - 4.375 diff ratio
PN 32703-86401

22 Tooth Cog - 4.625 diff ratio
PN 32703-86402

23 Tooth Cog - 4.875 diff ratio
PN 32703-86403
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okayfine
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Re: WTB: Mechanical speedo drive pinion

Post by okayfine »

Best of luck. The trans is/was somewhat questionable. I'd be interested to know if you don't use a red and it does work.
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JordanTr
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Re: WTB: Mechanical speedo drive pinion

Post by JordanTr »

I will let you know what comes of it!
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spriso
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Re: WTB: Mechanical speedo drive pinion

Post by spriso »

Not sure why Julian had an issue with not being able to get his car in gear-- that is a weird one since this mounts in a totally different spot on the trans.

We use the speed sensor illustrated in the SR20DE/T transmissions with our roadster swaps if people want to keep the stock speedo-- 90% of the time, we are changing to the all-electronic gauges, so we use the stock speed sensor on the SR gearbox.

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datzenmike
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Re: WTB: Mechanical speedo drive pinion

Post by datzenmike »

Some 5 speeds have the worm on the mainshaft very close to the striking lever and the 1st/2nd rod fork (not the shift fork) That would be the shorty below. Note where the speedo cable goes in.

Image

See where the worm gear is and how close to the rod forks
Image


The long tails have the worm well back on the mainshaft nowhere near the striking lever or rod.
Image

The speedo drive worm gear is the yelowish plastic thing on the far left of the mainshaft.
Image
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JordanTr
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Re: WTB: Mechanical speedo drive pinion

Post by JordanTr »

Got one yesterday from an 85 720 pickup, 2wd, 2.4L with the FS5W71C 5 speed. Sadly it came with a black cog so we'll still need a red one to get the speedo accurate.
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okayfine
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Re: WTB: Mechanical speedo drive pinion

Post by okayfine »

If you can use an auto VSS red pinion, I believe I have one.
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JordanTr
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Re: WTB: Mechanical speedo drive pinion

Post by JordanTr »

Sadly, they're totally different. I dissected the VSS when I did my KA swap. Thanks though :)
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bertvorgon
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Re: WTB: Mechanical speedo drive pinion

Post by bertvorgon »

Not sure if this applies to what you are asking..

at least in my 280zx box, as the teeth count goes up, you then must get the OFFSET housing, which then pulls the gear a bit further away from the drive gear in the transmission, other wise it will either bind or rip the plastic off the speedo gear.

I think my Nissan comp catalogue mentions at what tooth count you must switch housings.
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JordanTr
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Re: WTB: Mechanical speedo drive pinion

Post by JordanTr »

That makes a lot of sense.

This is going in the 521 and it needs a red gear to be accurate. It came from an FS5W71C and that's what it's destined for so I really can't see how it wouldn't work. Black is only 2 off red so it should be ok. We'll find out soon enough. Probably gonna end up with a housing when we order the red gear :p
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