Brake Fluid type

Probably a dumb question but I am doing the "big brake kit" (author MJBTaco) on my 2003 5 lug tacoma and I have just one question. The 03 requires DOT3 brake fluid but I am not sure if the calipers (from a 2006 Cadillac ATS) require DOT4/5 brake fluid. I would appreciate any input. Thx

 

all i can say for a fact is your not suppose to mix different DOT's of brake fluid in system

those higher DOT grades have higher boiling pts.....like for a track/race car

IMO
unless your autoX'ng/tracking your taco....DOT 3 fine
less work too
just make sure caddy ATS calipers are blown out with compressed air (to get rid of the DOT 4/5 fluid)

or
use the DOT 4/5 but make sure to flush every drop of DOT 3 fluid out of your current system

 

Nothing should require DOT4/5, they are completely different fluid types. DOT5.1, however, is compatible with DOT4 systems. You can flush out a DOT3 system with DOT4 and not have issues. I'd probably do DOT4 for this setup, especially if you are keeping the drums in the rear. I've run ATE TYP200 in everything from my 87 Supra to my 2021 Tacoma and countless other cars that started life as a DOT3 system and it's fantastic every time.

 

Castrol GT LMA Brake Fluid
Castrol GT LMA Brake Fluid engineered to provide outstanding performance for modern high-temperature braking systems. Its unique Low Moisture Activity (LMA) formulation provides maximum wet boiling point protection against vapor lock brake failure.

Recommended for all anti-lock braking systems (ABS), hydraulic drum and disc braking systems and hydraulic clutches requiring DOT 3 or DOT 4 fluids.

Features:

• Provides optimum braking response
• Exceeds DOT 3 and DOT 4 specifications
• Mixes with other conventional brake fluids

 

There You Go!^^^^

learned something new today.

 

Whatever fluid you go with, I highly suggest the Motiv power bleeder, with a 3rd party MC adaptor. It seems pricey up front, but it works so well.

 

Thanks everyone, great advice. Can't wait to get all the parts and put it all together.