95 Brakes - TDR Roundtable

95 Brakes

03-16-2003, 03:10 PM

#1 (permalink)

Balzac

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Join Date: Apr 2001 Location: Balzac Alberta Canada Posts: 116

95 Brakes

Looking for ideas to improve my brakes.
I have followed my service manual with all the checks.
All componnants have been replaced except the RWAL parts and the Proportioning valve.
Vacuum is , idle---15 in.
2000 RPM----------25 in.
No vacuum leaks. vac. valve at booster is OK.
Pedal is hard, at 35mph, hit the brakes hard and the rears chirp, then the RWAL cuts back and the truck comes to a stop with no front lockup, but not all that fast.
Put a pressure guage on the caliper, @ 20 in. vac. 1000 psi.
letting the engine idle, release pedal and apply again, only 400 psi @ 10-12 in. vac.
I believe I am short of pressure, therefore not getting sufficient braking. (possibly a vacuum problem, although I read that this vacuum system is not the greatest.)
Replaced in last 2 years, Discs, drums, calipers, vac. booster, 3500 rear cyl's., & shoes from Raybestos. Pads- Performance Friction. DOT-3 fluid changed twice.
Tomorrow I will check pressure at rear cyl. to see if there is any problem with valves.
I have talked to Glen @ EGR about shoes and pads. I think there is another problem, and until I either find it, or are convinced there is not, I am looking for help.
Any suggestions welcome.

Jim

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95 Black 2500 2WD CC LB, loaded except leather,TST #5,GSK, W Ell, DTT TC, VB, & S.C. Mag-Hytek Deep, R 9000's, AFE series 7, Iss. gauges, GPS. Power Vision, airbags, Pacbrake. AA 3:73-Disc Rear, 245/70/17 Toyo's, Frantz TP filter.

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