severe jerking on up-shifts - Toyota Yaris Forums

farrukhahmed · 06-02-2012, 02:19 PM

i'm having a serious problem with my yaris '05 1ltr. the transmission jerks like crazy on every up-shifts, so much so that it has broken the wheel spindle twice and the gear mount once...

Also, if I'm at a stop light and put the car in neutral, the same jerk comes even when shifting to D. The only time there's no jerk is on the first shift to D after a fresh start.

as a temporary resolve i've taken off the main grip on the tranny that goes to the ECU. in this way the transmission stays in the 3rd gear even when i start from halt, so you can imagine how slow the pick-up is....i can't climb a simple parking incline and if i switch on the AC while on stop, the car doesn't move at all.

i've had the transmission checked and they said its fine so it has to be something electronic.
i can understand the ECU lingo a bit so it would really help if i can get some relevant opinion from the experts here.

Em_ · 06-04-2012, 11:09 AM

did you check your fluid? maybe try putting in some new fresh a/t fluid

farrukhahmed · 06-09-2012, 07:48 AM

Done that. I'm suspecting its an electronics issue since I have the wiring replaced. Any lead on wiring related solutions?

06-02-2012, 02:19 PM	#1
farrukhahmed Drives: yaris 05 Join Date: Jun 2012 Location: Pakistan Posts: 2	severe jerking on up-shifts i'm having a serious problem with my yaris '05 1ltr. the transmission jerks like crazy on every up-shifts, so much so that it has broken the wheel spindle twice and the gear mount once... Also, if I'm at a stop light and put the car in neutral, the same jerk comes even when shifting to D. The only time there's no jerk is on the first shift to D after a fresh start. as a temporary resolve i've taken off the main grip on the tranny that goes to the ECU. in this way the transmission stays in the 3rd gear even when i start from halt, so you can imagine how slow the pick-up is....i can't climb a simple parking incline and if i switch on the AC while on stop, the car doesn't move at all. i've had the transmission checked and they said its fine so it has to be something electronic. i can understand the ECU lingo a bit so it would really help if i can get some relevant opinion from the experts here.

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06-04-2012, 11:09 AM	#2
Em_ Drives: 2007 Yaris Join Date: Jan 2012 Location: Laval, Canada Posts: 74	did you check your fluid? maybe try putting in some new fresh a/t fluid

06-09-2012, 07:48 AM	#3
farrukhahmed Drives: yaris 05 Join Date: Jun 2012 Location: Pakistan Posts: 2	Done that. I'm suspecting its an electronics issue since I have the wiring replaced. Any lead on wiring related solutions?