Tranny Problemzz

[GtRider]

own a 94 G20t auto
what would cause my first gear to stick?
when i cruise my engine revs up to like 4000 rpm den the car would do a slight jerk den goes in second gear?
it only does thiz problem when iam getting out of first gear
any ideaz?
do i need a new tranny?????
pleaze help!!?!??!

[boingo82]

It sounds like what the car does in "Power" mode...it raises the shift points so you can get more power from the engine. In "Comfort" mode the shift points are lowered so the car shifts more smoothly and runs quieter. The switch is located down on the center console in front of the gearshift. (If that's what it's called in an auto.) The other possibility, is what I keep doing to my car. I drove a stick-shift for the first 1.5 years of my driving, then got my auto G20. Since I'm used to a stick, when I can feel the tranny about to shift I automatically lift up on the accellerator a bit, causing a jerky shift. I have to consciously make sure I keep a steady right foot for a smoother shift.

[GtRider]

it only does a slite jerk.
i had a bad tire on the front left so i put the spare on now it drives almost normal
but it still dont change out of firts gear untill u lif ur foot of the gas then press it again.

[eeyore]

that'll be a broken kickdown switch.

ok, so I know practically nothing about automatic G20's here, but I know about auto boxes in general.

Most modern gearboxes are electro-mechanical and have an electrical "kickdown", either driven from the ECU or more often a mechanical switch. I'm guessing that the nissan box is actually a fairly old design and therefore has the latter.

In that case, you should find a switch either on, or beneath, your accelerator pedal. When you floor the gas, the pedal hits the switch and tells the gearbox "I want to go fast here", the gearbox then holds a lower gear until the last possible moment, in order to get the best out of the engine.

The switch, like all things mechanical and exposed, wears and breaks, thus telling your gearbox that it's in permanent kickdown mode.

Hope this helps, sorry it's a little non-specific.