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[Datsun 1200 encyclopedia]

Speedometer Cable

Revision as of 02:21, 6 September 2013; view current revision
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Category: Body Electrical System

Cable attaches Speedometer to the driven gear at the rear housing of the transmission.

19291.jpg

Part Numbers

Rockauto.com $7.76

Nissan Part Numbers
B10
25058-89914 ASS'Y-SHAFT, flexible speedometer B10 M/T
25058-89915 ASS'Y-SHAFT, flexible speedometer B10 Automatic
B110
25050 SHAFT ASSY-FLEXIBLE, SPEEDOMETER
JAPAN
* 25050-H1000 L=1500 <> 25050-H1001
* 25050-H1001 L=1400mm -8107
* 25050-G1600 8108-8910 > 25050-H1001
* 25050-95W00 8910-
USA - manual or automatic
* 25050-H1601 ASSY-SHAFT FLEXIBLE L=1700
* 25050-H1602 ASSY-SHAFT FLEXIBLE 0670- <> 25050-H1601
B210 
25050-H5000 ASS'Y-SHAFT, flexible speedometer Length=1700 A12
* B5050-Y8101 supercedes 25050-H5000 $51.22
25050-H5900 ASS'Y-SHAFT, flexible speedometer Length=1650 w/Master Vac NLA
25050-H7403 ASS'Y-SHAFT, flexible speedometer w/63-series trans
25050-H7410 ASS'Y-SHAFT, flexible speedometer A14 automatic
25050-H7411 ASS'Y-SHAFT, flexible speedometer A12 late

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.jpg


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.

Newer Datsun Cable

The last of the Datsuns featured a clip-on cable instead of screw-on to the speedometer head. So they will not interchanged with 1200 speedometer.

910 1980- 810/Bluebird
A10 Stanza/510
B310 Sunny/210

Comparison:
24189.jpg

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