Recently, in my good friend’s car with about 90k miles on it, (he doesn’t abuse or neglect it) he started getting the “GM morning sickness” as I used to call it… But his car is doing it warm or cold, shudder and slip leaving from a stop, and he has to feather the throttle and keep a light load.
He put up with this for a while before I noticed it one day while we were riding around.
He did some research, and found several people had had improvement by adding the Lucas trans treatment, so one afternoon, we sucked out about a quart of the fluid (I had serviced the trans about 2 years ago, but now he only drives about 400 miles a month.) which didn’t seem to smell or look burnt, and refilled with Lucas.
He drove it for a few weeks, saying it was slipping less, and was acting a bit better, but today I noticed it wasn’t slipping as much, but wouldn’t go into overdrive unless under almost zero load, and the lockup would only kick in intermittently.
Also, I noticed the speedo would drop almost to zero when it started to slip.
One other thing that has been constant throughout all of this, when climbing a steep hill, such a residential area, the car will no longer downshift from second to low gear.
I know the speedo is not cable operated like older cars, so the fluctuation is giving me hope, and I’m hoping it is something besides a complete rebuild.
I am just curious if anybody has experienced this being hopefully just a solenoid of some sort, or am I correct in my opinion I gave to him that it is on it’s last legs.