Transmission problem
1997 GMC Sierra V8 Two Wheel Drive Automatic 150000 miles
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The transmission on my GMC pick up has an intermittent whine. I asked a mechanic about changing the fluid, and he told me that if it had not been changed in the last 40K miles that it would most likely destroy the transmission. Can I get someone to confirm this for me? I mean a testimonial or first-hand knowledge.

Now, I do know that a bad catalytic converter can result in the same symptoms. Can anyone advise me as to a secure course of action?

rrw

i cant confirm it but i will deny it. you must change the fluid and filter, right now!!!!! the only thing that will cause this transmission to whine is a clogged transmission oil filter. i have seen it many times. also check to make sure the pan is not pushed in from hitting something. definitely change oil and filter with a new pan gasket.