is it true that you can get a 5th gear unlocked on the 4 speed auto box on 300zx???

 

or is there another 5 speed auto box that will fit??:cool:

I think you'll find there's a lock/unlock button on the auto box that locks the torque convertor and the gearbox sticks in 3rd gear. When you switch overdrive back on it drops back to 4th (3rd with overdrive)

 

It's good for short thrashes out in the country because you get engine braking.

 

"Hold" holds the gear longer and stops the gearbox from kicking down so easily

Its a 4 speed + overdrive. The autobox does'nt need another, Its got gearing for a theoretical 206mph.

 

The best(and only) 5speed conversion is a Manual conversion ;)

Edited January 18, 200916 yr by Yowser

I must be losing it, i thought the 4th gear was actually 3rd but locked i think i'm imagining thing lol

You normally get a lock up on top gear on auto's

well thanks all for the total confussion i am now suffering lol

well thanks all for the total confussion i am now suffering lol

 

no such gear as 5th in an automatic to give you a straight answer

I think you'll find there's a lock/unlock button on the auto box that locks the torque convertor and the gearbox sticks in 3rd gear. When you switch overdrive back on it drops back to 4th (3rd with overdrive)

 

It's good for short thrashes out in the country because you get engine braking.

 

"Hold" holds the gear longer and stops the gearbox from kicking down so easily

 

I think that Hold is for slippery road condition, you start driving in 2nd gear, to prevent losing traction, Power button is to hold each gear for longer

hold hold it in each gear longer before changing

power is for more acceleration

hold hold it in each gear longer before changing

power is for more acceleration

 

How do you achieve more acceleration?

How do you achieve more acceleration?

 

Its holds the gear to the rev limiter instead of changing earlier.

The 4 speed automatic transmission is a lockup type. When in drive mode, gears change 1-2-3 then 3 lockup, giving the effect of 4 gears. When overdrive (4th) is switched in, the change goes 1-2-3-4 then 4 lockup, giving the effect of 5 forward gears. There is a communications link between the automatic transmission control computer and the engine management computer, and this amongst other things, allows the engine computer to retard ignition, thus momentarily reducing engine power, during auto gear changes. Auto gear changes therefore are very smooth. The automatic transmission fitted to the turbo model is stronger than the one installed in the non turbo. Although the gear ratios are almost identical, there are many minor differences between the two transmissions.

 

The Japanese automatic transmission has many more features than the export models. A "power", "normal" and "hold" switch is fitted to modify transmission shift points. The effect of the "power" setting is to delay upshifting, but does not alter the maximum RPM that change occurs. In order to change at the red line or rev limiter speed, one must operate the shifter manually. The hold setting allows holding prevents downshift into second when the shifter is set to "D", and prevents downshift into first when the shifter is in "2". Another curious feature with the Japanese version is that lock up is also available in second gear.

no such gear as 5th in an automatic to give you a straight answer

 

Exactly! Not on a 300zx anyway........

 

......it's a 3 speed plus overdrive; giving 4 gears. 5 speed (and more) autos on passenger cars are a more recent development; new-ish BMWs and Jags have 5 speed auto transmissions whilst Mercedes use 7 speeds on their bigger engined cars.

 

Richard:cool: