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Discussion Starter · #1 ·
After looking through the service records, my 07 Tundra has the wrong transmission fluid. I bought the truck used and saw that the T4 automatic transmission fluid exchange was last performed about 38k miles ago. I find it concerning because it should have the WS fluid instead of Type 4. Will type 4 fluid affect my transmission? Should I flush it with WS fluid or is a drain and fill safer?
 
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