cscottmiller Posted May 14, 2006 Share Posted May 14, 2006 I have a 74 260z, LT1, Non-WC T-5. After recently fixing an overheating problem I took the car out for a spin on some backroads, mostly 3rd and 4th gear. The car ran just fine as usual. I then took it on the highway, 5th gear, 60mph. I went ten exits and exited to turn around. When I tried to downshift into fourth it would not go into any gear, including back into fifth. I sat on the side of the road for a moment before everything was back to normal. When I returned and exited, I let off the gas in fifth as I exited, the car made a loud screaching noise from the transmission, I took it out of gear, same story, would not go into any other gear. The only other problem I ran into was even though the car was in neutral, if I had the clutch pedal let out, it still acted as though it was in gear, or there was some kind of load on the engine. As I slowed down, it caused the car to jerk back and forth, like I was in 5th gear trying to go about ten mph. The car didn't stall, but came close. Luckily I was a block from the storage facility and managed to get it back into first. The car still does not run smoothly when in first gear, and continues to have problems even when in neutral. I went back this morning and can get the car into first, fifth, and reverse, but no other gears. It's no longer driveable. I didn't abuse the car at all, just cruised down the highway, so I'm at a bit of a loss for what the problem could be. Trying to be as detailed as possible. Any help is greatly appreciated. Quote Link to comment Share on other sites More sharing options...
dr_hunt Posted May 14, 2006 Share Posted May 14, 2006 IMO that's not a quick fix it type problem. Sounds like you have bearings seizing up for whatever reason. Your going to need a complete rebuild and possibly some hard parts as well if you plan on keeping that transmission. It looks to me like the T56 is really the way to go, but that in itself is work isn't it and not to mention $$$. Oh, the cost of these toys! Quote Link to comment Share on other sites More sharing options...
Tim240z Posted May 14, 2006 Share Posted May 14, 2006 Sounds like a visit to a wrecking yard is in your future! Quote Link to comment Share on other sites More sharing options...
Guest ViZ Posted May 14, 2006 Share Posted May 14, 2006 When you come to a stop does it act like the clutch is still engaged? check all the simple stuff like fluid level and such. then drain the fluid and check for shavings.. if they are goldish or bronze then your syncros are torn up. if its silver then it could be a number of things but i think it really sounds like the shift fork inside the transmission is binding up or busted. so its not engaging any gears, and its staying in a high gear which is why it bogs and feels that way. Quote Link to comment Share on other sites More sharing options...
cscottmiller Posted May 15, 2006 Author Share Posted May 15, 2006 It does feel like the clutch is somewhat engaged when I stop. The car doesn't stall, but it wants to move forward irradically. Guess I'll have to get it up on a lift this weekend and see what the deal is. Thanks for the input. Quote Link to comment Share on other sites More sharing options...
cscottmiller Posted May 24, 2006 Author Share Posted May 24, 2006 Just for future reference in case someone runs into a similar problem Dropped the transmission and had a shop look at it. The syncros were to blame. Quote Link to comment Share on other sites More sharing options...
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