Importance of Proper Fluids
But before you tear it apart, change the trans fluid to 70-90 NS redline synthetic, and the crunch may go away.
Great suggestion about changing the fluid to Redline 70-90NS. I bought a 1988 Alfa Romeo Spider this summer (2011) that had 71,000 miles on it with no rust. The car did not come with paper work or history. In addition, the PO of 7-years could not/would not tell me anything. After purchasing the car, I had a local (non-Alfa mechanic) change all the fluids (transmission, oil, differential, coolant) without specifying the fluids. As a result, the Alfa I got back was an oil burner with an extremely noisy/whiny transmission that was difficult to shift and had a crunchy second gear. I figured I would drive the car, keep adding a quart every 400 miles and rebuild the transmission over the winter.
In September, I changed the oil to Valvoline VR-1 20W-50, the oil consumption is now 1 quart every 1500 miles.
In November (2011), after driving my Alfa 5,000 miles, I came across the thread: 82 Spider Transmission Rebuild. Per the advice, I changed the transmission fluid to Redline 70-90NS over Thanksgiving. I found a few tiny metal shavings as well as some heavy greasy gunk on the drain plug and the old transmission fluid was still “new” looking.
WOW! With the Redline 70-90NS in the transmission, the Alfa shifts smoothly, the first to second gear crunch is gone (still have to make a slight pause between 1st and 2nd), down shifting is smoother (still have to double clutch for 2nd gear), the transmission in neutral whine is gone and the transmission is quiet in all the gears. The only bad thing is that winter is expected to arrive in Chicago this week and my Alfa will be hibernating out of the weather until April 2012.