Cerma Automatic Transmission Treatment - Clean, Revitalize, and Protect Transmission. Restore Smooth Shifting, Stop Slippage

Works!!

Great product 👍👍

After basically a full week of driving over 100 miles per day I have no change in how smooth the vehicle shifts. All gears feel the same. Nothing is broken the car throws no codes to even a dealers PCM tester. I opted to get all new tires yesterday and that helped more than anything but the companies claims it smoothes out shifting is not correct. At this point with the miles I've put on the vehicle a change should have been felt. I wouldn't buy it again. I've had a $5 product work better than this has...Update: I'm over 3000 miles now and still no improvement in smoother shifting. However, the company did give a refund for the transmission treatment so at least they stand behind the product.

I added this on a car that was having problems shifting in the city especially when cold. After adding Cerma my gas mileage went down by 2-3 miles a gallon. Not a lot but enough to have paid for itself within 5000 miles. Not many repairs can claim that. The first shift of the day can rougher than the rest but that seems to be more easily recognized because the rest of the shifting is so seamless. Shifting of gears is also much faster. When warm you can hardly notice. When I go into passing gear on a steep hill my Subaru used to make a bang. Now most of the time it is silent but if it does make a noise it is much quieter than this and the other 2 Subarus I have owned. I have had it in for 3 months now and it only seems to get better. I am installing it in other relatives because I like it that much. A+++ the engine treatment is great also.

Worked great on my coworkers old Kia minivan with 223k and it was shifting hard. It smoothed it out.This also smoothed out our 2018 Crosstrek with 82k and yes with a CVT . The tranny always surged slightly at low speed with the A/C on, now it rides smooth at all speeds. We also used the engine treatment in a 20 year old Malibu with 312k as we bought it and found it knocked when cold with a bad main bearing. After about 800 miles with the treatment the knock noise in the engine main bearing was gone and vibration too. This stuff works great!