DSepending on driving conditions the trans fluid is supposed to go 50,000 or 100,000 miles... I could not let the fluid go 50,000 miles... By that time the fluid may still have its protecting properties, but the fluid will be oxodised, that can and will cause shudders between gears... <---- This is why I cange my fluid at least once a year... I let my fluid in my 95 go almost 2 years, I won't be doing that again..
If you have the original pan gasket on the car than I'd keep that gasket and just get a filter.. Change the fluid and I'll bet you'll notice a diffrence.. you'll need about 7 quarts of Dexron III... I just by the stuff by the case..
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