Overdrive on Suzuki Esteem automatic transmission partially works?

Question

Sometimes, when I activate the overdrive button on my automatic transmission, it does not automatically kicks in. I have to go above 100 km for it to work. Would you know the solution to this? What should I check? Would it be mecanic coupling or at an electrical level?

Answer 1

shift solenoid.

Answer 2

One of two things. Either the shift solenoid is faulty or speed sensor. check the colour of the oil in the trans (should be red) if it's a darker colour then the clutch pack is worn out which is quite common with Jatco transmissions (which it will have)