My exi 2004 prosmatic is playing up with transmission. It feels it's slipping. Let me explain you briefly;
1- At start, it used to take while to engage in R in the morning. However worked on RPM nearly 4. D was OK.
2- changed engine, changed ATF, now ZIC ATF is inside. Worked fine for about 15 days except above stated problem.
3- couple days before, suddenly it refused to accelerate while I was overtaking a car. Seemed like it became neutral. Covered a few Kms after this, and I had to stop. Switched off engine, turned on again, and it worked fine.
4- now using it, and observing there is a slip when shifting 1-2 and 2-3 (up shifting). Rest of the gears are normal. No problems in downshift.
Please advise the diagnosis and fix.
Apologies if any required information is missing.