Somethin fishy with the tranny... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

anisht · 08-19-2002, 12:03 PM

Ive been trying my car out with a friend.  he has been teaching me to drive stick today, and when he drove the car, at a light, making a turn he down shifted to first and before it got into gear it made this high pitched grinding sound.  He said the car wasnt grinding, but it was a first gear lock out, to avoid shifting into first and revving up too high, or somehting.  He was going like 15mph, about 1.5k rpm.  Is this normal? SOmething doesnt seem right...

btw- its a 1990 240sx.

YellwMonky · 08-19-2002, 12:42 PM

you should NEVER downshift into 1st gear with a stock transmission. The gear lockout will not make a "whining noise," it should have just prevented you from going into gear. That noise was probably him grinding first. I know on cars that don't have a first gear lock if you shift into first at a high speed it will grind. My car will usually lock me out if i'm going above 8 mph or so. If yours didn't, it was probably a nice fat grind.

Fuzzy Ewok · 08-19-2002, 01:12 PM

ew, yeah, downshifting into 1st gear = ugly unless you're almost completely stopped.

Edited because my keyboard hates me.

*sykikchimp* · 08-19-2002, 01:23 PM

I don't know of any first gear lockout on the 240 tranny.  however I am pretty sure 1st gear lacks a synchro that the other gears have, soo.. you have to rev match to get the gear in if your going a bit faster than normal

There really is no reason to be in first above 10 mph.  If there is, you must rev match to get it in gear.

BboyOxygen · 08-19-2002, 02:24 PM

My 91 had lockout.. It wouldnt let me go into first anywhere above 10mph.. You should never need to put it into first above that speed anyway.

DuffMan · 08-19-2002, 04:34 PM

Theres no such thing as first gear lock out, you can shift into first if you rev match. It's not really a good idea though.

08-19-2002, 12:42 PM	#2
YellwMonky Zilvia Junkie Join Date: Feb 2002 Location: Fog Town Posts: 341 Trader Rating: (0) Feedback Score: 0 reviews	you should NEVER downshift into 1st gear with a stock transmission. The gear lockout will not make a "whining noise," it should have just prevented you from going into gear. That noise was probably him grinding first. I know on cars that don't have a first gear lock if you shift into first at a high speed it will grind. My car will usually lock me out if i'm going above 8 mph or so. If yours didn't, it was probably a nice fat grind. __________________ s13 92 White 240sx SE Coupe

08-19-2002, 01:23 PM	#4
sykikchimp WOW addicted Join Date: Dec 2001 Location: the moon Age: 44 Posts: 6,525 Trader Rating: (0) Feedback Score: 0 reviews	I don't know of any first gear lockout on the 240 tranny.  however I am pretty sure 1st gear lacks a synchro that the other gears have, soo.. you have to rev match to get the gear in if your going a bit faster than normal There really is no reason to be in first above 10 mph.  If there is, you must rev match to get it in gear. __________________

08-19-2002, 12:03 PM	#1
anisht Leaky Injector Join Date: Aug 2002 Posts: 86 Trader Rating: (0) Feedback Score: 0 reviews	Ive been trying my car out with a friend.  he has been teaching me to drive stick today, and when he drove the car, at a light, making a turn he down shifted to first and before it got into gear it made this high pitched grinding sound.  He said the car wasnt grinding, but it was a first gear lock out, to avoid shifting into first and revving up too high, or somehting.  He was going like 15mph, about 1.5k rpm.  Is this normal? SOmething doesnt seem right... btw- its a 1990 240sx.

08-19-2002, 01:12 PM	#3
Fuzzy Ewok Leaky Injector Join Date: Jul 2001 Posts: 90 Trader Rating: (0) Feedback Score: 0 reviews	ew, yeah, downshifting into 1st gear = ugly unless you're almost completely stopped. Edited because my keyboard hates me.

08-19-2002, 02:24 PM	#5
BboyOxygen Leaky Injector Join Date: Jan 2002 Location: Brentwood, Ca Age: 42 Posts: 140 Trader Rating: (0) Feedback Score: 0 reviews	My 91 had lockout.. It wouldnt let me go into first anywhere above 10mph.. You should never need to put it into first above that speed anyway.

08-19-2002, 04:34 PM	#6
DuffMan Post Whore! Join Date: Oct 2001 Location: in a cardboard box Posts: 2,517 Trader Rating: (0) Feedback Score: 0 reviews	Theres no such thing as first gear lock out, you can shift into first if you rev match. It's not really a good idea though.