Valvoline Restore and Protect ATF

You'll be fine changing the filter and adding the 5 or 6 qts. You're dumping old Valvoline for 100% compatible new Valvoline.
Then if you have a drain plug, another spill and fill down the road if you want a greater percentage of new fluid.
Don’t plan to use Valvoline Restore and Protect as I still want more real time data
 
I was working on my 2007.5 Silverado and decided to drain and fill my rear diff and I didn't pay attention to the previous owners maintenance records and I thought he had serviced the transmission at 72k miles but it was at 52k miles. I thought I might as well do the transmission. Now I'm at 128k miles and not sure if I should use Valvoline Restore and Protect and just use the Valvoline Dexron VI/Mercon LV Full synthetic that he used. I don't want to damage the transmission but I do want to service it. I planned to just change the filter and add 5-6 quarts. I know it isn't good to flush it but not sure if I was to keep pumping several quarts through it until I have 100% Valvoline Restore and Protect but not sure what would happen if I just add 5-6 quarts of Valvoline Restore and Protect.
How many quarts would I need to run through it to get to 100% Valvoline Restore and Protect?

Thoughts?

If you're going to replace 5-6 quarts, you could do what I did and get one gallon jug of Dexron VI, and 1 or 2 quarts of Valvoline Restore and Protect. Valvoline states all their fluids are compatible with each other (that state Dexron VI on the bottle, at least). Will you get all the benefits of Valvoline Restore and Protect? Probably not. But if you later decide to do another drain and fill, it might give you more confidence to do a gallon of Valvoline Restore and Protect and 2qt of regular DexronVI.
 
Update on my 2016 Chevy Cruze LT at ~94.5k miles (5K in) for those following along -

Not much to report other than it is still about 80-90% better than it was. Torque converter lockup issue that appeared around 800 miles in for a short period at low RPM has gone away. Light to full throttle upshifts are all smooth. Still a little bit of slip maybe in 3rd and 5th at WOT when cold but hardly noticeable. Some downshifts when slowing can still be felt, but not major. The car is aggressive in cutting fuel / employing traction control when there is slip in the transmission so at WOT really manifests as a hesitation and loss of power, but it seems very normal compared to how it was prior. Around 100K, will do another drain/fill, I have 5.4qts of Valvoline Restore and Protect left.

My friend with a 2017 Cruze LT has just done a drain/fill at 86K after starting to experience some of the same hesitation and harsh downshift symptoms I had, missed 3rd on an on-throttle downshift and car selected 2nd after bucking and hesitating for several seconds. His also had never been changed and was dark / silvery as well, but also smelled very burnt. We got 5.6 qts out of his vs. 5.1 out of mine, somewhere around 60% exchange. First drive after and to/from work over last couple nights he said were positive. He also plans to do a second drain / fill with Valvoline Restore and Protect before 100K.
 
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