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Review 3 of 19
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2001 75w90ns Summary:
I strongly advise against usiung RedLine oil for use in transmissions, period. In my experience it offered no real benefit (in drivability or otherwise) over the OEM oil., and may even have caused damage. I used 75w90ns gear oil in my 01 Prizm since it was new and the transmission just failed (complete lock up) at 87k miles. One of the countershaft bearings went out. This is an extremely rare failure for this Toyota transmission. In fact, I could find no other instance of this type of failure. I therefore conclude it was due to the RedLine oil. For my car, it was very difficult to figure out exactly which Redline product was applicable. Perhaps I selected the wrong one. At any rate, I used Redline in my transmission and my transmission failed. I will never use any Redline oil in any tranmission ever again.
Of course I cannot speak for the engine oil; it is probably ok. And I do continue to use the WaterWetter in my radiator.
As to synchro wear: the synchros in my transmission wear good as new, as were the gears, but the bearings went out. Strengths:
No significant benefit over factory OEM transaxle oil. Weaknesses:
May have caused transmission failure in my car.
Difficult to determine correct product application. Similar Products Used:
GM Synthetic Manual Transmission Fluid #12346190, which I highly recommend.
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