Is there a fix, for type A?

[richyboycaldo]

Hello I have a 240z 70 vin 05820, so I have the type A, however I already changed 3 bushings and the pin, nothing changed, so in a post I read a guy who sais it was the fork, so I went on ebay and just typed "240z fork" and bought one looks like a "Y" (but sideways) but apparently it looks like something for the cluth, is this the right fork or are any other forks?. thank you very I am getting tyred of the sloopines and I want to keep the stock tranny.

[Pir0San]

the sloppiness is due to bad bushings in the shifter if I remember correctly, and there are occasionally brass bushing replacements floating around in cyberspace. I have the type A in my Z, and the shifter has brass bushings, and there is no more sloppiness than the type b had before I shattered it.

[richyboycaldo]

Here is a quote from kinfish

"The "A" style transmissions used in the Series I 240's are inherently sloppy with age due to poor design. That is one reasons they upgraded to the "B" style which uses the nylon bushings shown in the "sblake01" response. I found that the problem is caused by wear of the fork, not the pin which is held in place by that tiny snapring. I also replaced the rubber bushings holding the shift lever but it did nothing to reduce sloppyness. I decided to live with it!"

I already changed the bushings (not for brass ones) what does he mean by fork?

[JimmyZ]

Selector forks inside the tranny perhaps.

I replaced all ball bearings twice, synchro rigs once in my 2/71 4spd before chucking it a couple years later. (Drove the car really hard) In my experience the early four speeds are garbage. I drove mine hard and it whined since the day I bought it. Annoying.

In disassembly of MT's I found that they do have a finite life and once certain tolerances are exceeded it is better to chuck 'em. You can buy some time by replacing the bearings but it's cheaper to get a salvage tranny.

The later 5 speed Mt's are soooo much nicer.

[sblake01]

Here's a scan of the shift mechanism in a type A. The forks are circled. But I agree with JimmyZ.

[jmark]

My type A has the Nismo comp bushings and it is still not has easy to shift as my son's '78 5 speed. I won't swap it however due to originality.....

[Carl Beck]

Here is a quote from kinfish

I already changed the bushings (not for brass ones) what does he mean by fork?

... if you look at the picture sblake01 provided in response #5 - you will see that item #38 slides inside item #39 and is then held in place by the pin #32 and the snap-ring #37. I think kinfish was referring to item #39 as being "the fork"... (not the actual shift forks inside the transmission).

Note also that item #38 has a "bushing" - ie item #34.

I believe that kinfish was saying that part of the sloppy shifter feel is caused by that #34 bushing wearing.. and not the pin that goes though it. Many people replace that bushing and pin, with a stronger steel bushing and secure the parts with a bolt/nut in place of the pin.

There are rubber bushings that hold the shift lever #1 in item #38. There are steel bushings available that replace the original rubber ones here - but it transmits more noise into the passenger cabin.

BTW - what "3 bushings" did you already replace? (item numbers in the picture?).

FWIW,

Carl B.

[jmark]

Here is what I had installed.

http://www.courtesyparts.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=99996-C3030&Category_Code=s30_nismo_shiftbushing

[richyboycaldo]

Hello, Its me again, Its been 4 years, but I decided to continue with the 240z project. I replaced part 2,3,4,30 31, 38, from the diagram. I figured out the fork thing. My "loosesness" is coming from part 30 and 31. I decided to put a washer between both ends of part 40/41 in order for pin 30 to be more tight and helped a bit, but I haven't changed parts 33/ 34 Does anyone know were I can buy them?

Edited March 10, 2011 by richyboycaldo

[Arne]

The only place you are likely to find specialized little bits like that will be a Nissan dealer, assuming that they are still available.

[Firstfruits Farm]

Here is how some have fixed the sloppiness:

http://www.atlanticz.ca/zclub/techtips/shifterbushing/index.html

There was another fix that I used on my '78; using a standard brass plumbing fitting (I forgot the diam.), chucking it in a drill and filing off the threads and taper. It replaces the worn out nylon bushing well. Shifting is now tight and smooth. The brass has natural lubricity against the steel shifter ball.

[Arne]

Here is how some have fixed the sloppiness:

http://www.atlanticz.ca/zclub/techtips/shifterbushing/index.html

There was another fix that I used on my '78; using a standard brass plumbing fitting (I forgot the diam.), chucking it in a drill and filing off the threads and taper. It replaces the worn out nylon bushing well. Shifting is now tight and smooth. The brass has natural lubricity against the steel shifter ball.

Wrong answer. That is for Type B transmissions, not Type A. The Type A linkage is totally different and this solution does not apply.