2003 Corolla - Dealership Filled Transmission With WS Instead of T-IV

[ahmede]

The Toyota dealership drained my 2003 Corolla's tranny and filled it with WS instead of T-IV ATF OIL

They discovered the mistake 80km later. Claim to have flushed the system and refilled with T-IV.
I have been experiencing very mild shift shock when the gearbox engages overdrive.
Reported the problem to them. ThIs time they drained the gearbox and REfilled it with T-IV
THE PROBLEM PERSISTS
any suggestions from members would be helpful to resolve this problem.

 

[Scott O'Kashan]

They either fix the problem or they owe you a rebuilt transmission. Period.

 

[ahmede]

They are prepared to resolve the problem. I am hoping that a rebuild is not necessary. My car has only covered 73000km in the past 10 years.
Still in showroom condition.
Would another drain make any difference.
The problem seems to lie with the torque converter.
Normally that section of oil does not drain , it needs to be flushed out. I suspect the dealership is taking short cuts.

 

[Scott O'Kashan]

If you can get a rebuilt/new transmission because of the dealerships negligence, go for it.