weazle69

i have an 05 gto. car has been shifting extremely hard. getting in it in the morning, the car with give you wiplash when you put it down into drive then shift hard through every gear. can drive it for about 30 minute, turn it off and start it back up, 90 percent of the time is goes back to normal. just wondering if anybody has an opinion or if this has happened to you. your help is much appreciated

zanthor991

Does it shift hard into reverse also? It sounds like its defaulting to max pressure. Do you have a way of checking for transmission codes? Tech2 or anything?

weazle69

yea it shifts hard into every gear

joecar

Using a scantool check for any DTC's and also check that the sensors are showing correct values...

for example, a broken wire for the IAT sensor will cause maximum line pressure on some calibrations.

weazle69

my scanner shows no codes being thrown. noticed today when its warmer out it doesnt do it but has about a 3 second lag when it drops from 2nd to first when the gas is about half way down. any thoughts?

johnp94

iTrader: (12)

Same with my 99 z28 with shift kit. Someone told me it idles high at first so thats why it gives whiplash. They said after it warms up the engine will idle down some. So I now wait about a minute before I pull out. In New York I parked on a down hill so I would just be in neutral until I got to the end of the street. Then put it in drive and it was fine. I've been told not to worry.

weazle69

no mine still does it after it idles down. car could be running for an hour and still do it. drive it about ten minutes, turn it off and its fine in warmer weather. when its cold it does it no matter how long the car has been running and if you turn it off. still does it

weazle69

anybody have an idea?

1999transamls1

iTrader: (5)

the same thing just started on my car, but starts after about 10 mins of driving. it feels likes it just throwing it self into all gears. if you turn it off, it goes away, but after 10 mins of driving it comes back.