View Single Post
Old 03-15-2010, 03:02 PM   #23 (permalink)
Brendan@Bwalk
Supporting Nissan Dealer
 
Brendan@Bwalk's Avatar
 
Join Date: Mar 2010
Location: Redwood City, CA
Posts: 56
Drives: Unreliable V8
Rep Power: 15
Brendan@Bwalk is on a distinguished road
Default

Quote:
Originally Posted by Hugoneus View Post
Thanks for the replies.

For those of you who chose to attack me, can you explain to me why I would NOT be able to down shift into first? What is the mechanical limitation?

I have often noticed that it is hard to shift into first or second, I think it is worthwhile to understand why.

Have you guys actually tried to down-shift from 2nd to 1st? Is it very hard to do? Or impossible?
The limitation is the ability of the synchro to match the vastly different speeds of 2nd and 1st gear. 2nd gear at 3k will put you at a very high rpm in 1st, and that is a HUGE speed for a synchro to accelerate up to.

Either 1 - Double clutch (neutral, clutch out, rev to the rpm it should be at in 1st, clutch in select first), or 2 - don't shift into 1st at that speed.

You never want to force a transmission to do anything...ever. That's how you break things, whether it's a synchro, shift fork, or detent bushings. If the transmission doesn't want to do what you're asking, you're either asking it to do too much too quickly, or it's broken.

In this case, it seems like you're asking it to do too much too quickly, especially since at 1k miles it's hardly broken in.
Brendan@Bwalk is offline   Reply With Quote