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Old 06-28-2011   #1
jrd1990zr1
 
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Location: Delanson, NY
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Default Hydraulic Clutch Fluid

Noticed my clutch master reservoir is down a little, figured I would top it off.

I just got back from a couple auto supplys, a NAPA and a GM dealer.

Auto supplys don't know what I should use, GM dealer says GM fluid (12345347) is discontinued.

Any idea what should be used to top off?

Also any way to test the fluid in the system before I potentially contaminate it?? Not sure what previous owner might have used???

Any advice is appreciated.

Thanks, John
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Old 06-28-2011   #2
LGAFF
 
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Default Re: Hydraulic Clutch Fluid

DOT 3 or Dot 4 if I recall
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Old 06-28-2011   #3
ittlfly
 
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Default Re: Hydraulic Clutch Fluid

Quote:
Originally Posted by LGAFF View Post
DOT 3 or Dot 4 if I recall
I flush my clutch master cyl every year and refill with DOT 3. Appears to work just fine.
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Old 06-28-2011   #4
LGAFF
 
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Default Re: Hydraulic Clutch Fluid

To be clear DOT 3 brake fluid
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1987 Callaway TT #17
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Old 06-28-2011   #5
jrd1990zr1
 
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Default Re: Hydraulic Clutch Fluid

Thanks Guys!!
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1968 convertible Lemans Blue,
1986 coupe Medium Blue NCRS Top Flight (sold),
1990 ZR1 #2529 Red NCRS Regional and National Top Flight (sold),
1990 ZR1 #2124 Charcoal Metallic NCRS Top Flight 2010 & 2018,
2003 Anniversary Red Convertible (sold)
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Old 06-28-2011   #6
PhillipsLT5
 
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Default Re: Hydraulic Clutch Fluid

but why is it low?
leaking slave?
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Old 06-28-2011   #7
secondchance
 
Join Date: Aug 2006
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Default Re: Hydraulic Clutch Fluid

Quote:
Originally Posted by LGAFF View Post
To be clear DOT 3 brake fluid
When I got the hydraulic fluid specifically for the the clutch hydraulic from a Chevy dealer I was told the fluid was not hydroscopic-meaning non-brake fluid.
Are we condemned to a substitute?
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Old 06-28-2011   #8
LGAFF
 
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Default Re: Hydraulic Clutch Fluid

Looks like summit has it, according to other sites its DOT3 with an addative; I have run DOT 3 with no issues

I think Summit has this in stock
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Old 06-28-2011   #9
Kevin
 
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Default Re: Hydraulic Clutch Fluid

i've used dot 3 to top off before and the clutch started to chirp on me
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Old 06-29-2011   #10
rhipsher
 
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Default Re: Hydraulic Clutch Fluid

Oh brother! Just get this stuff at Oreillys and be done with it.
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