New Brake System - Dot3 or DOT4? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**FL71C10** · 08-03-2018, 05:37 PM

I am completely redoing the brake system in my truck from stem to stern. It's a 71 with factory discs up front, power brakes, nothing fancy.

What type of fluid should I use?

**Steeveedee** · 08-03-2018, 07:14 PM

DoT 3 is all you need. You can use the DoT 4. It has a higher boiling point, if that is a concern. I use DoT 3 in my truck, even when pulling a trailer (which has its own electric brakes).

VWNate1 · 08-03-2018, 09:49 PM

Either will work but DOT is what disc brakes call for .

The main thing is to remember to fully flush and replace it every two or three (at most) years .

**kwmech** · 08-04-2018, 12:43 AM

I put DOT 4 in everything now-a days.

08-03-2018, 05:37 PM	#1
FL71C10 Senior Member Join Date: Jun 2010 Location: Orlando, Florida Posts: 2,508	New Brake System - Dot3 or DOT4? I am completely redoing the brake system in my truck from stem to stern. It's a 71 with factory discs up front, power brakes, nothing fancy. What type of fluid should I use? __________________ 71 Chevy C10 Shortbed Stepside. LT1 with 4l60E. Just got back from painter, in assembly now.

08-03-2018, 07:14 PM	#2
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,613	Re: New Brake System - Dot3 or DOT4? DoT 3 is all you need. You can use the DoT 4. It has a higher boiling point, if that is a concern. I use DoT 3 in my truck, even when pulling a trailer (which has its own electric brakes). __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

08-03-2018, 09:49 PM	#3
VWNate1 Registered User Join Date: Feb 2012 Location: So. Cali. Posts: 2,658	Brake Fluid Dot3 or DOT4? Either will work but DOT is what disc brakes call for . The main thing is to remember to fully flush and replace it every two or three (at most) years . __________________ -Nate Geezer '49 3100 235 W/ Muncie SM420 SOLD '69 C/10 shortbed sidemount survivor 250 L6 W/ 350TH

08-04-2018, 12:43 AM	#4
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,602	Re: New Brake System - Dot3 or DOT4? I put DOT 4 in everything now-a days.



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