Read the whole post to fully understand why GM/Pennzoil syncromesh sucks ass-
When I got my 93 TT a couple weeks ago I noticed the shifting was pretty rough for a transmission with only 400 miles on it (receipt from dealer for installing new tranny.) I drained the fluid in the tranny and refilled with Pennzoil Syncromesh.
Initial Results
As soon as I shifted I noticed a dramatic difference. Shifting was much smoother and all gears were much easier to shift into. The roughness between 1-2 and 2-3 was gone. The transmission shifted like butter. I figured this syncromesh wasn't bad, I was wrong...
2 weeks, 2,500 miles later
I just returned from a 1,800 mile round trip from florida and noticed the transmission was getting back to the way it was- rough between 1-2 and 2-3. I thought the transmission may have a leak so I pulled it into my shop tonight and drained the fluid. The fluid level measured exactly 2.5 quarts so I didn't have a leak. What I did notice was the fluid was no longer its brownish/clear color. It looked shiny and silver- like if there were a bunch of metal particles floating around in the fluid. It looked exactly like the pictures in this thread- http://www.3si.org/forum/showthread.php?t=254510
After reading about all the silver particles coming from syncromesh in various trannies I decided to trust an experts opion- Frank @ Kormex Transmission and filled the tranny with 2.5 quarts of Mobil 1 10w30 motor oil.
Result
Put about 20 miles on the car tonight and the roughness between 1-2 and 2-3 is gone again. Car shifts better with 10w30 than it did with the syncromesh. So far, so good. I will drain the fluid after putting 2,500 miles on it and see if the fluid has the same silver color. I will alse post about the shift quality.
Final Impression
All and all syncromesh appears to be really good for tranny- for about 2,000-3,000 miles . Personally, I don't want to change my oil and transmission fluid regularly, just oil is expensive enough. I highly recommend against syncromesh unless you like changing your tranny fluid regularly. Mobil 1 all the way!
When I got my 93 TT a couple weeks ago I noticed the shifting was pretty rough for a transmission with only 400 miles on it (receipt from dealer for installing new tranny.) I drained the fluid in the tranny and refilled with Pennzoil Syncromesh.
Initial Results
As soon as I shifted I noticed a dramatic difference. Shifting was much smoother and all gears were much easier to shift into. The roughness between 1-2 and 2-3 was gone. The transmission shifted like butter. I figured this syncromesh wasn't bad, I was wrong...
2 weeks, 2,500 miles later
I just returned from a 1,800 mile round trip from florida and noticed the transmission was getting back to the way it was- rough between 1-2 and 2-3. I thought the transmission may have a leak so I pulled it into my shop tonight and drained the fluid. The fluid level measured exactly 2.5 quarts so I didn't have a leak. What I did notice was the fluid was no longer its brownish/clear color. It looked shiny and silver- like if there were a bunch of metal particles floating around in the fluid. It looked exactly like the pictures in this thread- http://www.3si.org/forum/showthread.php?t=254510
After reading about all the silver particles coming from syncromesh in various trannies I decided to trust an experts opion- Frank @ Kormex Transmission and filled the tranny with 2.5 quarts of Mobil 1 10w30 motor oil.
Result
Put about 20 miles on the car tonight and the roughness between 1-2 and 2-3 is gone again. Car shifts better with 10w30 than it did with the syncromesh. So far, so good. I will drain the fluid after putting 2,500 miles on it and see if the fluid has the same silver color. I will alse post about the shift quality.
Final Impression
All and all syncromesh appears to be really good for tranny- for about 2,000-3,000 miles . Personally, I don't want to change my oil and transmission fluid regularly, just oil is expensive enough. I highly recommend against syncromesh unless you like changing your tranny fluid regularly. Mobil 1 all the way!