I have an 03 LS, 3.9, that was having some shifting issues so i took it to a highly recomended trans shop in my area. He has rebuilt the trans, replaced the computer and still can't get the trans to shift right. They are claiming that there is some type of electrical problem that is causing the line pressure to build which in turn is causing the hard shifts. Does this make sense to anyone or does anyone have any ideas as to a possible cure??
03 LS trans line pressure problem
- Thread starter jbird2333
- Start date
joegr
Dedicated LVC Member
Hard shifts are usually due to a bad solenoid assembly in the transmission.
Weird electrical problems can often be traced to one or more marginal COPs (ignition coils). They create electrical noise that can cause many strange things. If you have more than 60K miles on the coils, it is probably time to change all of them and all of the spark plugs at the same time. However, I think your shift pressure issues are inside the transmission, specifically the solenoid assembly.
Weird electrical problems can often be traced to one or more marginal COPs (ignition coils). They create electrical noise that can cause many strange things. If you have more than 60K miles on the coils, it is probably time to change all of them and all of the spark plugs at the same time. However, I think your shift pressure issues are inside the transmission, specifically the solenoid assembly.