78 280Z transmission service - Nissan : Datsun ZCar forum :Nissan Z Forum: 240Z to 370Z
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post #1 of 8 (permalink) Unread 09-29-2019, 11:44 AM Thread Starter
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Question 78 280Z transmission service

My son and I have a 78 280Z that needs transmission work.

Any suggestions on places in KC metro?

Thanks,
Scott
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post #2 of 8 (permalink) Unread 09-29-2019, 03:43 PM
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Originally Posted by Scott Browning View Post
My son and I have a 78 280Z that needs transmission work.

Any suggestions on places in KC metro?

Thanks,
Scott
Automatic or Manual ?

Larry


1976 280Z - Street

1973 240Z - SCCA Autocross F Prepared
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post #3 of 8 (permalink) Unread 09-30-2019, 09:39 AM Thread Starter
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Automatic or Manual ?
Manual
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post #4 of 8 (permalink) Unread 09-30-2019, 07:37 PM
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I've had a '76 Z manual transmission apart and replaced the bearings. Not very difficult, but I didn't have to disassemble the entire gear sets.

What are the symptoms you need to fix?

Aside from that, I'd recommend finding another transmission that's compatible and avoiding the teardown and rebuild. Or you can ask around indy shops in your area, looking for someone who is familiar with Z-cars. It will be an older mechanic.

Fixing a manual tranny isn't that hard with the shop manual and a parts source.
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post #5 of 8 (permalink) Unread 10-03-2019, 09:32 AM Thread Starter
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It's stuck in reverse but the shifter moves freely in all directions.


I agree with replacing with a transmission that's compatible. Trying to find someone who can work on it.

Scott
78 280Z Turbo manual
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post #6 of 8 (permalink) Unread 10-03-2019, 01:08 PM
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It might be something fairly simple.

On my '76, when I pulled the tranny and checked it out, I found that there's a front half and a back half of the case, and both bolt up to a carrier plate in the center of the tranny. Once I pulled the case halves, I could clamp that center plate in a bench vise and have the entire transmission neatly displayed in mid-air in front of me. Very cool design, and that made it very easy to see all of the transmission pieces.

I worked on that nearly 30 years ago, so I don't recall much more than I have shared here.

I'm pretty sure yours has the same tranny my '76 did. You can see the central plate (black) in the photo here: https://zcarsource.com/manual-5-spee...-turbo-rebuilt

Last edited by pilgrim; 10-03-2019 at 01:16 PM.
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post #7 of 8 (permalink) Unread 10-04-2019, 01:40 AM
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Pilgrim is correct. I have had the split pins in the shift rods break, causing the problem you have described. See photos. The reverse shift lever split pin is the green circled. Easy fix. Just use a punch to remove the broken pin, and put in a new one. Also a good idea is to find a smaller pin that will go inside of the new one. Less chance of breaking again.
Attached Images
File Type: jpg shiftrod1.jpg (214.8 KB, 5 views)
File Type: jpg shiftrod2.jpg (207.1 KB, 5 views)

Larry


1976 280Z - Street

1973 240Z - SCCA Autocross F Prepared
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post #8 of 8 (permalink) Unread Today, 05:18 PM Thread Starter
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These are great photos, thanks. Probably beyond our ability to fix ourselves. Hoping to find someone in the Kansas City area interested in doing this work.

Thanks,
Scott

Scott
78 280Z Turbo manual
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