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[Datsun 1200 encyclopedia]

Speedometer Cable

From Datsun 1200 Club

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Category: Body Electrical System

A flexible-shaft cable attaches the Speedometer to the driven gear at the rear housing of the transmission.

Part Numbers

19291.jpgAlbum click to view

* 25050-H1000 L=1500
* 25050-H1001 L=1400mm
* 25050-G1600 8108-8910 > 25050-H1001
* 25050-95W00 8910-
USA - manual or automatic
* 25050-H1602 ASSY-SHAFT FLEXIBLE L=1700
1700mm $7.76
ATP Y885 $7.62
25058-89914 ASS'Y-SHAFT, flexible M/T
25058-89915 ASS'Y-SHAFT, flexible Automatic
25050-H5000 ASS'Y-SHAFT, flexible Length=1700 A12
* B5050-Y8101 supercedes 25050-H5000 $51.22
25050-H5900 ASS'Y-SHAFT Length=1650 w/Master Vac NLA
25050-H7403 ASS'Y-SHAFT 63-series trans
25050-H7410 ASS'Y-SHAFT A14 automatic
25050-H7411 ASS'Y-SHAFT A12 late
* NOT compatible with B110/B210

Cable Breaks

The speedometer cable usually lasts forever. There are two common reasons why it will break:

  1. Mechanical kink or breakage, for example if you drive over a tree branch and it pulls the cable
  2. Bad or missing engine ground wire.
Additional reasons
* Lack of grease
* Break in cable allows water which freezes in winter
17711.jpgAlbum click to view

I think you'll find this is caused by poor/dirty ground strap from the engine to the body inside the engine bay.

It only takes once, and the cable it screwed, as it melts the nice polyethylene coating on the inside.

See how the cable's protective plastic appear worn..I'd say it melted during starter crank. Then when the cable gets some speed up, the plastic grabs and the cable snaps.

Swap Cables

All 56-series (4-speed or 5-speed) use the same cable.

For 60-series (4-speed or 5-speed), the speedo driven gear is slightly further back on the transmission. Some stock 1200 cables will work, but not all (depending on length).
22337.jpgAlbum click to view 1674.jpgAlbum click to view

For 63-series transmission a longer cable is required.
14289.jpgAlbum click to view

For 63-series gearbox, use a 610/710/810 cable, or a B210 cable.

NOTE: The B310 featured a clip-on cable instead of screw-on to the speedometer head. So the B310 cable will not interchange with the 1200 speedometer.

NOT interchangeable
910 1980- 810/Bluebird
A10 Stanza/510
B310 Sunny/210 78-90cm

24189.jpgAlbum click to view

The 810 cable (1977-1979 810/200B) is of the same type as a 1200 but longer (about 1950mm). 

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