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[Datsun 1200 encyclopedia]

Shift Forks

From Datsun 1200 Club

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Category: Transmission

Shift Control mechanism allows you to select a single gear, and locks out the other gears at the same time (interlock mechanism).

Stuck Gears

Jam gears, shifter won't move: A broken roll pin on the 5/R shift fork can cause the 5/R rod to be sloppy enough to allow the shifter striking rod to slip between the gap to 5/R with out first returning the 4/3 rod back to Neutral. POST post

Brackets & Fork Rod form interlocks
2-1 Fork Rod 32809M 32801-H9700 ROD-FORK 3RD & 4TH
4-3 Bracket         32813-H9700 BRACKET-SHIFT ROD A
5-R Bracket         32382-H9700 BRACKET-REVERSE & OVERDRIVE
60A Shift Rods
2407.jpgAlbum click to view

Non-dogleg

Typical of non-dogleg gearboxes is the 71C 5-speed series, which is very similar to the 60A 5-speed.

POST post

After the gearset is installed onto the Sandwich plate, the shift rods & forks are next.

First, the 4TH & OVERDRIVE rod and fork go on. Followed by the 2 Check Balls (interlock balls)
ipodphotos220.jpg

Followed by 2ND & 3RD rod and fork and the last 2 check balls
ipodphotos221.jpg

Followed lastly by 1ST & REVERSE rod and fork
ipodphotos222.jpg

The purpose of the interlocks, on any geabrbox, is to prevent you from accidentally selecting 2 gears at once by limiting the rod positions to one rod moving at a time.

The Check Balls, Plungers and Springs are dropped into the edge of the Sandwich plate, then plugs are fitted to the holes
ipodphotos241.jpg

Now the Brackets line up (in neutral position), ready for the Selector Finger
ipodphotos225.jpg

Striking Rod (selector rod) with Striking Lever (selector finger) will rotate to select a specific Fork Rod, then pull or push to move that Rod out of neutral
ipodphotos239.jpgPost click for topic

The large hole in the Rear Case is for the Reverse Checking Assembly. It is the interlock for reverse gear.
16289_52e3c862487b3.pngUpload click to view 

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This page has been accessed 3,322 times. This page was last modified 04:01, 5 September 2017. Content is available under Datsun 1200 Club.