Weak Drivetrain

[R33Turbo]

hey, just got a question about drivetrains, cuz somebody mentioned how mis-shifted into lower gears at full throttle could weaken the drivetrains. If this does occur, how would i notice that the drivetrain has actually weakened? will it lose power on the dyno run?

cheers

[ShayneJ]

start to notice grinding noise when changing gears and eventually BANG.... The gearbox goes on holidays and wont come back until you rebuild or buy a new one.

Just be gentle with the gearbox don't slam it into gear all the time. Change slowly and it will last alot longer

Edited May 8, 2008 by ShayneJ

[R33Turbo]

oh thanks 4 reply. i always thought skyline gearboxes were invincible heheh, but its smooth for now

[ShayneJ]

nothings invincible. I have been through 4 gearboxes in my old R31 skyline. though they aint built like the rb25det gearbox. Just don't flat change and always try and wait for the synchro's to mesh and you shouldn't have a problem at all. In terms of strength they are pretty strong but its the synchros which wear out and start to grind. After they were out enough the wear moves to the actual gears (this would be metal deposits left on magnetic gearbox drain plug)

[R33Turbo]

oh i get it. Just wanted to let you know, i got gear crunches on 5th gear at high speed once or twice so far (As i don't speed up to 5th gear often anyway) and also sometimes on 4th. But this isn't occassional, so is this quite normal?

[ShayneJ]

your synchros may be starting to wear and you just try and change gears to quick for them. My gearbox had a grind into 4th no matter how slow or fast you were going. Its quite common that 4th gear synchro grinds in an r33 box as they wear the fastest.