Hi,

I'm looking for brass synchronizers for my early 4spd. I found one that supposedly fits a 240 through 280 (1st though 4th). Are the synchronizers (1st through 4th) for early 4spd (1970 through mid 71) really the same as those in later transmissions?

Can anyone recommend a source?.

Thanks in advance!

We share the same transmission code - F4W71A (also known as the "Monkey Motion" shifter).  To the best of my knowledge, the rebuild kits for these Type A units are NLA.  That's why I have a type B unit from a parts car stashed in my garage in case my unit ever goes out.

A very, very long shot might be to identify each of the synchros by P/N and contact your local Nissan dealer to see if they might locate them somewhere.  The folks at Courtesy Parts (David and Butch) are good at running down scarce parts if they can be found.  Good luck!

 

 

Edited September 8, 20195 yr by jfa.series1

Compare your ring baulk numbers here.  Looks like they're the same part, A and B.

http://www.carpartsmanual.com/datsun/Z-1969-1978/power-train/transmission-gears/4-speed/to-aug-71

http://www.carpartsmanual.com/datsun/Z-1969-1978/power-train/transmission-gears/4-speed/from-sep-71

http://www.carpartsmanual.com/datsun/Z-1969-1978/power-train/transmission-gears/4-speed

Yes Zed Head, you're right! PN: 32604-P0100 (AKA: "RING-BAULK) Items 39 and 44 in schematic. (Apparently less than $10 at a "local" place).

I only read Jim's reply and started hunting for information. (After a couple of hours searching; also chasing our cat to give him meds) I stumbled across a large pdf with lots of part numbers. Would anyone be interested in the rest? (it's ~40M ). I included section 177 because it shows the Nissan publication number.

By the way, how do I delete a duplicate copy/pasted image?

Edit, thanks Z.H. BTW, I see the same microfiche publication "C-0010V" is already available under Resources tab.

 

 

Edited September 6, 20195 yr by Oceanzide
Remove image, add publication number

Click the little translucent trash can on the lower corner of the image in the separate images window to remove an image.  If you just cut it from the message it will come back, as you've found.

Until last week I'd never heard of these folks, and I was ready to spend $20 EACH plus shipping, for 4 parts. Their website turned-up when I searched the part#.  NOTE: It's important to search the part#; using the home page Mfr/Year filter didn't show ANY parts for pre 1980 Zs. Also note, the web price (~$8 at this moment) is slightly higher than at the counter (see counter receipt below).. They said they also sell bearings.

I hope to drop F4W71A trans soon and promise to post-back regarding whether these actually work.?

https://www.anaheimgear.com/index.php?route=product/search&search=32604-P0100

Edited September 8, 20195 yr by Oceanzide
Mention was ready to pay $20 EACH

That is a truly amaZing find!  Even more so since the discounted price at Courtesy is $49 each.  Thanks for posting the results of your search, looking forward to your update.

Thanks Jim! I see some pictures that show a grey bearing surface (mine don't have); there may be better quality synchros out there.

Removed trans this weekend, but won't crack it open until next Sat.

Don't just replace the synchros on the assumption that "new" is better.  I'd use the worn Nissan synchros over new inexpensive aftermarket if they're in spec.  There are several stories out there from people who put new aftermarket synchros in for a rebuild and didn't like the results.

I certainly would not spend time on the transmission if it was shifting well.

Years ago, my neighbor gave me a drum of 85W gear oil that he used in his Peterbilt.  Thinking all gear oil was the same, (and new was better) I put it in the Z transmission and differential. Now (20+ years later) it's a chore to get the trans into just about any gear but 2nd, and fast shifts are impossible.

Edited September 10, 20195 yr by Oceanzide

Well, the new ones seem to be identical to the old ones. Pic shows new synchros installed. The old ones are below (in pic).

This is Great information. Now I need to find a good trans shop here in central Florida to go through it before I drop it in. Converting an automatic to manual. I found a complete drive train from a 83.