I wanted to change from Dex III H to Dexron VI...so i pumped out the pan once and refilled with 4 qts Dex VI.Trans seemed to work ok but the shifting felt a little different.We drive it a few 100 miles and i pumped out the pan again abnd refilled it then drove it a few 100 more miles and it startied working very nice.Solid shifts and very consistant shifts.I figured i'd change the fluid out one more time but the last time i had the pan pulled off,installed a new GM factory filter(to replace the Champ labs after market filter installed @ 50k)and refilled with Dexron VI.The pan was perfectly clean and looked like brand new...so did the filter.
Now the transmission acts very strange,its shifts very weak.1-2 shift is ok but weak...2-3 you can barely feel at all and 3-4 the same way.Before i changed the fluid the trans worked perfectly,hard shifts in all gears.Now if you try WOT throttle the trans doesn't slip nbut it shifts so weak its a joke.Almost like a luxury car would.I also notice the car seems to accelerate smoother and a little faster,i'm assuming because the DEx VI is so much thinner than the Dex III.I hope it doesn't ruin anything but tomorrow i'm pumping out the Dex VI and putting back in 4 qts of Dex III.If it doesn't fix it i'm going to be a very unhappy.
Now the transmission acts very strange,its shifts very weak.1-2 shift is ok but weak...2-3 you can barely feel at all and 3-4 the same way.Before i changed the fluid the trans worked perfectly,hard shifts in all gears.Now if you try WOT throttle the trans doesn't slip nbut it shifts so weak its a joke.Almost like a luxury car would.I also notice the car seems to accelerate smoother and a little faster,i'm assuming because the DEx VI is so much thinner than the Dex III.I hope it doesn't ruin anything but tomorrow i'm pumping out the Dex VI and putting back in 4 qts of Dex III.If it doesn't fix it i'm going to be a very unhappy.
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