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Main : Mechanical : Body and Interiors Speedometer for low gearing

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Speedometer for low gearing
Speedometer for low gearingPopular
SubmitterddgonzalMore Photos from ddgonzal   Last Update2017/10/8 6:54    Tell a friendTell a friend
Hits1940  Comments2    0.00 (0 votes)0.00 (0 votes)
Scale Adjusted for low gearing, looks good printed on photo sticker paper and applied to speedometer.

MPH PNG web download (689 kb)

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Poster Thread
oldrunner
Posted: 2017/10/25 5:06  Updated: 2017/10/25 5:06
Not too shy to talk
Joined: 2004/1/29
From: Garden Grove, Ca. USA
Posts: 35
 Re: Speedometer for low gearing
David,

My question relates to the speedometer. Haven't text for a while. I'm the owner in Southern California you helped me our green 1200 with my struts about two years ago. Finally found a pair in England. Also put an A-14 with a Weber 36/32 two years ago. I had asked for advice from you in replacing the A-12 as well. Thanks again.

Now I have a problem. The pinion gear to the speedometer's bullet started leaking. Took it to a transmission shop. They put a used bullet and pinion gear (20 teeth) and it stilled leaked from the center of the pinion stem. We still have the original automatic transmission which has been great for 36 years we have owned it. So we are in the process of trying to replace the pinion gear and bullet. Purchased a pinion gear (17 teeth; part #7503) from the Japanese supplier but its so much shorter than the 20 teeth as well as loose in the bullet. The add says it fits 1200. But after purchase the add also said it fits the 4 speed trans. So the question we have is: Is the Automatic transmission bullet and its pinion gear different in size from the 4 speed bullet and gear? We think there is a difference. Didn't keep the original bullet and pinion; should of. I found a new bullet from that Japanese provider but don't want to purchase it as it appears to fit the 17 tooth pinion gear I have which seems to be for a 4 speed trans. Help!

Poster Thread
ddgonzal
Posted: 2017/10/25 6:32  Updated: 2017/10/25 6:35
Moderator
Joined: 2001/5/3
From: Hawaii, USA
Posts: 28891
 Re: Speedometer for low gearing
hi oldrunner. Yes, the automatic is the big 71-series and the 4-speed is the little 56-series. The gears are definitely different. They were used by Nissans small and big into the late 1980s

Not sure what the bullet is. Nissan uses these terms:
Sleeve & Pinion


Notice there are two O-rings

I wonder if oil leaking out is due to a worn speedometer cable? The cable runs transmission fluid inside it which is not supposed to leak out. Or maybe the seal is missing. Oreilly stopped carrying the 1200 cable about 2 years ago (it was only $15), but a new cable is $7 at Rockauto. Use the B210 cable which fits 1200

New Sleeves and/or pinions are available, search for other Datsun, for example 280Z: Datsun automatic