Good evening all,
I recently purchased an '81ZX 5-speed to swap into my '75 280z, and found that the transmission will only shift into 1st and 2nd gear. I'm using the ZX shifter, and it's clearly engaging the shifter arm. The shifter won't move over to the positions for 3-4 and 5-reverse and any attempt is met with a huge amount of resistance. Unfortunately I did not find this out until the transmission was swapped into my 280. I've also found that even in neutral the engine and transmission are engaged.
I swapped back in the original 4-speed, but I'm curious as to what would cause the 5-speed to not be able to shift and basically always be in-gear. I initially thought it might be a clutch slave cylinder issue, but with the trans out of the car it still won't shift into any position other than 1-2. I've read that it may be a bent shift fork, or that it may have something to do with the striker rod. Anybody have any suggestions/fixes? My only experience with transmissions is doing the basic clutch change.