Watch specs on transmission fluid! It cost me.
#1
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I decided after 210,000 miles to change the manual transmission fluid on my 88 Audi 90 FWD. Bought some 70W90 full synthetic Quaker State GL-5 at the local auto parts store, put it in and immediately had a problem. The shifting was rough, would not syncronize. Suspecting that I screwed up, I called up Red Line Oil's 800 number and got some good advice. My car needed GL-4 spec, Redline's MT-90 oil which has some "friction modifiers" to allow for easier shifting, helps syncronizer work better. Redline rep said the GL-5 was too slipery.
After a search, I found the Redline at a speed shop. Drained out the Quaker State and put in the Redline and everything is back to normal. Good smooth shifting.
I learned this one the hard way, but at least I flushed with the double change.
After a search, I found the Redline at a speed shop. Drained out the Quaker State and put in the Redline and everything is back to normal. Good smooth shifting.
I learned this one the hard way, but at least I flushed with the double change.
#2
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I had the same problem with my 1986 Coupe's gearbox. Put in some synth oil, caused shifting problems! Replaced hypoid with regular, non synth oil, shifting back to normal.
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