I know there has been posts about this issue in the past but I needed some help from my fellow 350z owners.

Here whats going on my engine was replaced in January before I replaced I had 107,000 miles. I replaced to an engine that had only 60,000 miles the engine is now great but after it was replace a couple days later my 350z started to grind. I took it to a transmission shop and it was the throw out bearing I also replaced the flywheel. The grinding stopped then a week later 5th gear started to grind. So i took it back to the transmission shop and they replaced the 5th gear syncro and update a shaft. Everything was good for a week and then 3rd, 4th and reverse started grinding. Not only have the gears started grinding but today I was at a stop and I couldnt go into any gear even though my clutched was pressed all the way . The car just started to vibrate couple second later it allowed me to go into 3rd gear to get home. As you guys can imagine im frustrated since i have spent a ton money and i cant even drive my car now.

Is it my transmission? clutch is also less than 6 month old. I have had my car for 3 years and for 2 years it gave me no problems until now.

P.S is z1motorsports an official and reliable 350z source?

Help would be great appreciated

 

What year is your Z? It sounds as though repeated attempts at a repair have only resulted in more problems. I can understand your frustration. You spent time and money and have gotten nowhere.

Transmission repairs typically are accomplished by swapping out for a rebuilt unit. Since repeated attempt at repairing your transmission have been unsuccessful, ask the shop to swap out your transmission and credit the amount you have paid so far. --Spike