Reinforcing the 6MT transmission

Originally Posted by crazy4oldcars

150mph in 5th sounds about right. I think you hit the RPM limiter, not the speed limiter. Top speed is supposed to be around 165 mph (~265 kph).
I have heard tales of people having their 6 speeds rebuilt with Ford synchro's, making them more durable. A search in the tech part of the forum would reveal more on that. Haven't needed the info, so I haven't researched it. From my limited reading, the rest of the transmission seems to hold up well.


Kirk B.

Originally Posted by NissanZ34

No I still had about 100 rpm before hitting the rev limiter which was set at 7600 rpm by the dealership. It was speed limited because the speed and rpm wouldn't budge.

Thanks for your imput.

Originally Posted by Rusty

The stock rev limit is 7,800. You can change that with Uprev or Ecutek. Why would the dealer lower the rev limit? Plus I don't think the dealer has that option with their software.

Are you talking about when the rev light flashes? If you are. You can change that yourself.

Originally Posted by NissanZ34

My car was rev limited at 7500 rpm when I purchased it. I asked the certified mechanic to raise it to 7600 which he did.

The certified Nissan mechanic said he can change the speed limiter, rev limiter and timing but he did not want to change the timing when I asked him to advance it.

All the modifications were installed by that mechanic.

Originally Posted by Rusty

How did he raise the rev limit? On the dash on the right side, where the gas gauge/water temps lights are?