Brake upgrades

gmc502

gmc502

Member
Jan 16, 2011
466
12
18
torqued2dmax said:
gmduramax I got the part # for the hydro boost 1780853 but I need the # for the master cylinder . I have an 05 3500 drw , if it matters , thanks for a great post on upgrade !
Click to expand...

I ordered this one.

https://www.amazon.com/gp/product/B004SG5M0U/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

and like to say thanks to gmduramax for blazing the path.
hope to install next week since I only have rear brakes on the truck,master cylinder finally died,but hey,,it went 320k miles.
 
torqued2dmax

torqued2dmax

Member
Mar 26, 2017
646
1
18
Brookville, PA
Thanks guys , this giant hunk of steel is hard to get stopped , with all the crazy drivers out there and they always have kids in the car , they have no clue . THANKS AGAIN !
 
malibu795

malibu795

misspeelleerr
Apr 28, 2007
8,246
550
113
42
in the buckeye state
Had a caliper freeze on me... killed a rotor before I caught it...
IDK what I pulled off but the vent holes are substantually smaller than the $90.00 napa fleet grade rotor.. I have a set on the front of my LMM with over 200k on them
27503197_10214094530050838_2900974010802677594_o.jpg
 
gmc502

gmc502

Member
Jan 16, 2011
466
12
18
gmc502 said:
thats what rock auto said
Click to expand...

well master came today,its a bigger bore,but the fittings don't seem to be 14mm,they measure out to 12mm but are a different(finer) than my 2002 lines.
I'm still gonna use it.now to find the fitting.

gmduramax,can you post up pics of your master?
 
torqued2dmax

torqued2dmax

Member
Mar 26, 2017
646
1
18
Brookville, PA
gmc502 said:
well master came today,its a bigger bore,but the fittings don't seem to be 14mm,they measure out to 12mm but are a different(finer) than my 2002 lines.
I'm still gonna use it.now to find the fitting.

gmduramax,can you post up pics of your master?
Click to expand...
If you go on rock and compare years , ac gives disc of bore sizes and thread sizes . 2002 bore 37mm , thread 12.7 mm 2008 like you bought , bore 37mm thread 12 mm 2011 bore 38.1 thread 12mm on ac1741190 on ac18m2568 bore 38.1mm thread 14mm also in 2011
 
torqued2dmax

torqued2dmax

Member
Mar 26, 2017
646
1
18
Brookville, PA
torqued2dmax said:
If you go on rock and compare years , ac gives disc of bore sizes and thread sizes . 2002 bore 37mm , thread 12.7 mm 2008 like you bought , bore 37mm thread 12 mm 2011 bore 38.1 thread 12mm on ac1741190 on ac18m2568 bore 38.1mm thread 14mm also in 2011
Click to expand...

So it looks like up to and including 2006 thread is 12.7 mm 2007 started the 12 mm that might be the thread problem your running into because your new master is from 2007 2008 12mm and your truck 2002 is 12.7 mm . Hope this helps !
 
gmc502

gmc502

Member
Jan 16, 2011
466
12
18
torqued2dmax said:
So it looks like up to and including 2006 thread is 12.7 mm 2007 started the 12 mm that might be the thread problem your running into because your new master is from 2007 2008 12mm and your truck 2002 is 12.7 mm . Hope this helps !
Click to expand...

w/ the info you provided,I'm sending the 1 I bought back and getting the ac 190 one,38.1mm bore w/ the 12mmx1.0 pitch.I'll make it work.
 
gmc502

gmc502

Member
Jan 16, 2011
466
12
18
torqued2dmax said:
Who would have expected so many different bore and thread combinations ? I hope you find something that works best for you , let us know !
Click to expand...

will do and your right,same year and 2 different masters w/ different size fittings.
 
torqued2dmax

torqued2dmax

Member
Mar 26, 2017
646
1
18
Brookville, PA
You still have to watch out though because the older trucks before 2007 are 12.7mm , its crazy ! But you got yours working anyway ! It was great that you started this so we can all learn as we go . Thanks again !
 
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