jerking on "P" and "READY"

KandyRedCoi · 06-07-2008, 06:07 PM

noticed a pretty annoying jerk on the car while im parked and the car is on ready foot brake down

car seems to shake when the engine kicks on like its tryin to jump off the curb LOL

anyone else experience this on their Gen2 Prii???

is it normal, should i have it looked at?

any info would be great!!!

thank you!

jammin012 · 06-07-2008, 06:16 PM

I noticed this also. If Park is engaged the car shakes and jerks forward a little. I started engaging the parking brake and this minimized the shake, but I still notice this a little.

It's a torque issue. The motor being mounted transversely causes the car to "lurch" forward when the motor starts. The same is true when a V8 revs up and you feel the car roll side to side. There's just too much power under the hood of these Prii.

hiremichaelreid · 06-07-2008, 09:00 PM

Normal it appears.

I napped a bit in mine with AC on in 85 degree temp with high humidity and AC set to 73 or so.

Engine started up every 5 minutes or so and ran for one minute. Each restart caused the car to jerk a bit so I decided I needed the parking brake on too.

All part of the quirky Prius personality...

(We don't call them flaws here.)

/

Neicy · 06-07-2008, 09:46 PM

Perfectly normal. Has to do with the fact that drive is always engaged, even when the parking pall (sp?) is on. You'll get used to it. I always engage my emergency (parking) brake in addition to putting the car in park. A habit I can't break from the "olden days".

Bill Merchant · 06-07-2008, 09:51 PM

You'll notice that the start-up shakes subside as the car breaks in (and you get used to it, perhaps.) See if you think it shakes so much after 6000 miles or so.

And get that annoying jerk off your car, he isn't an attractive hood ornament.

Bob64 · 06-08-2008, 12:10 AM

It's part of the transmission. Because all the gears are always engaged to the tires, when the engine starts, a little torque makes it through the MG before the prius manages to send a counter-force to the MG to balance it out.

Normal.

KandyRedCoi · 06-08-2008, 02:13 AM

thanx for the 411, i always use the parking brake as well, the car has about 9200K miles on it alrdy

i guess i just need to get used to it LOL

06-07-2008, 06:07 PM	#1
KandyRedCoi S is for Super! Join Date: Mar 2008 Location: SoCal/AZ/NV Posts: 860 My Car: 2008 Prius Model: Package: #6 Touring Thanks: 0 Thanked 0 Times in 0 Posts Friends: 6	jerking on "P" and "READY" noticed a pretty annoying jerk on the car while im parked and the car is on ready foot brake down car seems to shake when the engine kicks on like its tryin to jump off the curb LOL anyone else experience this on their Gen2 Prii??? is it normal, should i have it looked at? any info would be great!!! thank you!

06-07-2008, 06:16 PM	#2
jammin012 The man behind The Man Join Date: Nov 2007 Location: Cali Posts: 511 My Car: 2007 Prius Model: Package: #4 Thanks: 0 Thanked 0 Times in 0 Posts Friends: 1	Re: jerking on "P" and "READY" I noticed this also. If Park is engaged the car shakes and jerks forward a little. I started engaging the parking brake and this minimized the shake, but I still notice this a little. It's a torque issue. The motor being mounted transversely causes the car to "lurch" forward when the motor starts. The same is true when a V8 revs up and you feel the car roll side to side. There's just too much power under the hood of these Prii.

06-07-2008, 09:00 PM	#3
hiremichaelreid Wrnchs OScopes Computers oh my Join Date: May 2008 Location: Ottawa/Aylmer, Canada Posts: 429 My Car: 2008 Prius Model: Package: Pioneer #3 Thanks: 2 Thanked 2 Times in 1 Post Friends: 0	Re: jerking on "P" and "READY" Normal it appears. I napped a bit in mine with AC on in 85 degree temp with high humidity and AC set to 73 or so. Engine started up every 5 minutes or so and ran for one minute. Each restart caused the car to jerk a bit so I decided I needed the parking brake on too. All part of the quirky Prius personality... (We don't call them flaws here.) /

06-07-2008, 09:46 PM	#4
Neicy Senior Member Join Date: Apr 2007 Location: Wakefield, MA. Posts: 804 My Car: 2009 Prius Model: Package: #2 Thanks: 5 Thanked 0 Times in 0 Posts Friends: 6	Re: jerking on "P" and "READY" Perfectly normal. Has to do with the fact that drive is always engaged, even when the parking pall (sp?) is on. You'll get used to it. I always engage my emergency (parking) brake in addition to putting the car in park. A habit I can't break from the "olden days".

06-07-2008, 09:51 PM	#5
Bill Merchant absit invidia Join Date: May 2005 Location: USA \| Oregon \| Portland area \| 97004 \| Posts: 4,100 My Car: 2007 Prius Model: Package: #5 Thanks: 18 Thanked 10 Times in 8 Posts Friends: 60	Re: jerking on "P" and "READY" You'll notice that the start-up shakes subside as the car breaks in (and you get used to it, perhaps.) See if you think it shakes so much after 6000 miles or so. And get that annoying jerk off your car, he isn't an attractive hood ornament.

06-08-2008, 12:10 AM	#6
Bob64 Sapphire of the Blue Sky Join Date: Apr 2007 Location: Virginia Posts: 1,135 My Car: 2007 Prius Model: N/A Package: #2 Thanks: 3 Thanked 9 Times in 9 Posts Friends: 0	Re: jerking on "P" and "READY" It's part of the transmission. Because all the gears are always engaged to the tires, when the engine starts, a little torque makes it through the MG before the prius manages to send a counter-force to the MG to balance it out. Normal.

06-08-2008, 02:13 AM	#7
KandyRedCoi S is for Super! Join Date: Mar 2008 Location: SoCal/AZ/NV Posts: 860 My Car: 2008 Prius Model: Package: #6 Touring Thanks: 0 Thanked 0 Times in 0 Posts Friends: 6	Re: jerking on "P" and "READY" thanx for the 411, i always use the parking brake as well, the car has about 9200K miles on it alrdy i guess i just need to get used to it LOL

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