Tell me please which hydraulic clutch fluid i can use instead of GM 12345347 ?

Manual say Dot 3 but i can find only dot 4 and higher. Also i see that old dot3 was mineral and new ones are thyntetic (for example "Motul" Dot3)

Wich fluid and which manufacturer do you use?

also i know that GM 12345347 contain friction modifiers

ps sorry for bad english

 

i use dot 4 brake fluid and havent had any problems. the manual says dot 3 because there wasnt dot 4 when it was written.

 

Thanks for the answer.

look what i've found about friction modifiers which some manufacturers of dot4 may contain and some of them may not:

quote:
(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". For Clutch hydraulic Systems, we actually recommend using Valvoline full-synthetic Dot3/Dot4 Brake Fluid over any other fluid.

http://www.zfdoc.com/faq.htm

 

After flushing clutch slave and lines from repair/rebuild, I use ATF for clutch hydraulic circuit.