Z32 Transmission Problem - Won't disengage 3rd gear

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
Petros Kar
Posts: 1
Joined: Thu Feb 20, 2025 12:45 am
Car: 1991 Nissan 300ZX Z32

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Hello there guys!

I have a problem with my Z32 transmission. The problem is that the car when I rev out 3rd gear, it won’t disengage 3rd. It’s like the gear lever is stuck in gear. When I’m going from 3rd to 4th under like 3,5k rpm the shifter works flawlessly.

I changed the 3rd-4th fork, the 3rd syncro plus the 3 additional sims it has and it’s still the same. Any points what to look for next?

New to the forum, I'm looking forward to interact with y'all!

Hope you have a good day!


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Ozzie
Posts: 3780
Joined: Fri Oct 14, 2005 12:36 pm
Car: '90 Nissan 300ZX twin turbo - 2 seater
'99 Mitsubishi Legnum VR-4 Type-S twin turbo
'71 TA22 Toyota Celica (flat light)
'06 MK5 Golf tdi
and some motorbikes too
Location: Australia

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I don't want to throw a generic response in here, but that's a unique problem to me..... (haven't heard of that before)
If you have actually replaced the parts you say you have, then it sounds like a physical interference/alignment issue.
What is the shifter play like? I'm wondering if the shifter support bracket/bushing is toast, and causing some vague-ness to the shifter alignment.
Are the engine mounts and trans mounts in good order, without excessive play?
How about the bolt tension from the bell housing to the block?


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