Either the guy didn't do the job, got conned himself, or just had the fluid drained and not a full fluid exchange like you got. A fuild drain only replaces about 10% of the AT fluid. The mechanic drains the transmission pan and replaces/cleans the filter.There's still a lot of fluid in the transmission inner workings and even more in the torque convertor. SO, if you mix 10% clean fluid with 90% dirty fluid you would just end up with slightly cleaner ATF. It's always best to have a full ATF exchange. The price generally runs in the low 100s.Transmission Fluid in Pontiac Vibe continually dirty?
Because the owner didn't change it at 30,000 miles like the GM maintenance schedule told him (her) to.Transmission Fluid in Pontiac Vibe continually dirty?
a bad transmission fluid filter. tranny fluid filters are very small and can go out quite easily. buy one from advanced auto parts cheap and not so hard to replace probably not so hard on a vibe