Best Clutch Fluid
Racer
Joined: Nov 2006
Posts: 251
Likes: 0
From: SAN JOSE CALIFORNIA
From zfdoc.com...
"(Q.) Do you have any detailed instructions relative to the "PROPER" way to R&R the Clutch hydraulic fluid for a 1984 Vet? A local shop replaced the Clutch Fluid (DOT 3) - before they did the R&R, the clutch worked great (30K original miles). But when I drove away from the shop, the clutch seemed different, and produced gear-clash when I tried to get into reverse. I let the car sit for the weekend, and a few days later the clutch had lost all of it's pressure and shifting the manual transmission was very difficult. I took it back to them and suggested that there was air in slave, and gave them instructions to tilt the slave Cylinder at 90* when bleeding because of the bleeder valve location -they did it, and the clutch pressure came back, could shift into the 4 gears and occasionally ground when going into reverse. I drove the car for 32 miles, and I lost 85% of the clutch pressure, and was unable to shift into any gear. Mike – C4 Corvette owner
(A.) Service (R&R) of the clutch hydraulic fluid for the '84-'88 Corvette is generally the same as the '89 - '91 C4 procedure. The procedure can be viewed at http://www.zfdoc.com/clutch_hydraulic.htm. Remember that DOT3 is a classification of fluid type and does not necessarily contain the additives found in GM P/N 12345347 "Hydraulic Clutch Fluid". The GM hydraulic clutch fluid should be used because it better lubricates the seals, extends seal life and resists air entrapment within the clutch hydraulic system."
"(Q.) Do you have any detailed instructions relative to the "PROPER" way to R&R the Clutch hydraulic fluid for a 1984 Vet? A local shop replaced the Clutch Fluid (DOT 3) - before they did the R&R, the clutch worked great (30K original miles). But when I drove away from the shop, the clutch seemed different, and produced gear-clash when I tried to get into reverse. I let the car sit for the weekend, and a few days later the clutch had lost all of it's pressure and shifting the manual transmission was very difficult. I took it back to them and suggested that there was air in slave, and gave them instructions to tilt the slave Cylinder at 90* when bleeding because of the bleeder valve location -they did it, and the clutch pressure came back, could shift into the 4 gears and occasionally ground when going into reverse. I drove the car for 32 miles, and I lost 85% of the clutch pressure, and was unable to shift into any gear. Mike – C4 Corvette owner
(A.) Service (R&R) of the clutch hydraulic fluid for the '84-'88 Corvette is generally the same as the '89 - '91 C4 procedure. The procedure can be viewed at http://www.zfdoc.com/clutch_hydraulic.htm. Remember that DOT3 is a classification of fluid type and does not necessarily contain the additives found in GM P/N 12345347 "Hydraulic Clutch Fluid". The GM hydraulic clutch fluid should be used because it better lubricates the seals, extends seal life and resists air entrapment within the clutch hydraulic system."
