soft brake peddle - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mylow53 · 02-16-2011, 12:20 AM

hey guys i just got my 15 year old an extended cab v6 1996. just the right engine for the boy. any ways i wanted to ask you all if there is a reason the break peddle seems to be mushy. it's got around 3" of travel before to begins to stop. 4 " and your stopped.... i heard the flex lines might cause this. i was thinking of swapping all flex lines and a new master cylinder. any advise would be appreciated...
thanks
GT

benoit454 · 02-16-2011, 12:35 AM

calipers, wheel cylinders, rear need adjusted, flex lines, even the dump/isolation valve for the abs system can cause issues.

The mc as well.

mylow53 · 02-18-2011, 07:57 PM

so replace it all!! sound like a good plan. this truck is for my teenager so stopping is important!!!!
thanks
GT

Tink · 02-18-2011, 08:19 PM

The rubber lines can stretch as they age causing a spongey pedal feel. Also, these trucks have never been known for super good pedal feel.

89chevsj · 02-18-2011, 09:18 PM

i have sorta the same thing. but with a twist. my peddal seems soft in 2wd but when in 4wd seems to firm up some. it was supposed to have ABS but it doesnt work aparently... when in 2wd it seems to lock up easily though and just slide. mabey similar problems?

mylow53 · 02-18-2011, 10:28 PM

i think ill start will all new flex lines thanks guys
GT

benoit454 · 02-18-2011, 10:38 PM

parts are farily cheap, or maybe hit rockauto's site for better deals, I would do lines, claipers, wheel cylinders, pads, shoes, and hardware kit. Then maybe look into the dump valve for the abs or RWAL system.

**bwood** · 02-19-2011, 02:15 PM

Make sure the rear shoes are adjusted properly against the drum.

89chevsj · 02-19-2011, 05:26 PM

drums are adjusted right. and pads and shoes are new. disks look new. probably just replace the whole system.

k5hart · 02-19-2011, 06:20 PM

Good luck. I've replace almost everything and it still doesn't feel great. Will stop though. Guess that's what counts.

89chevsj · 02-19-2011, 08:16 PM

its just weird i've owned alot of these trucks. but non of them had these problems.

benoit454 · 02-19-2011, 08:36 PM

I hear ppl over and over on other forums with these trucks especially the oldest of the body style 88,89, etc. and alot of times they too replaced everything only to find out the EH, isolation/dump valve for the RWAl system bad.

http://www.aa1car.com/library/abs_kelseyhayes_rwal.htm

also check out the last page or two or my thread on removing it,

http://www.gmt400.com/forum/showthre...RWAL-box/page4

89chevsj · 02-19-2011, 10:33 PM

ok. thanks for the warning. i realized today out driving my Pacifica how bad the truck brakes are... too bad i had to realize that while peeling my face off the windshield haha

02-16-2011, 12:20 AM	#1
mylow53 Registered User Join Date: Sep 2006 Location: thousand oaks, California Posts: 732	soft brake peddle hey guys i just got my 15 year old an extended cab v6 1996. just the right engine for the boy. any ways i wanted to ask you all if there is a reason the break peddle seems to be mushy. it's got around 3" of travel before to begins to stop. 4 " and your stopped.... i heard the flex lines might cause this. i was thinking of swapping all flex lines and a new master cylinder. any advise would be appreciated... thanks GT __________________ Greg 1953 chevy 1/2 ton 5 window, chevy 350 330 horse 700r tranz, lowering spindels mustang 2 frount. ford 9", airbags on 4 corners . purchased in 1983 for $325 while in high school http://67-72chevytrucks.com/vboard/s...=215079&page=5

02-16-2011, 12:35 AM	#2
benoit454 Chris Join Date: Nov 2004 Location: Monaville, WV Posts: 3,737	Re: soft brake peddle calipers, wheel cylinders, rear need adjusted, flex lines, even the dump/isolation valve for the abs system can cause issues. The mc as well. __________________ Chris GIT R DONE!!!!!! Check out all our rides, http://www.cardomain.com/id/benwa454

02-18-2011, 07:57 PM	#3
mylow53 Registered User Join Date: Sep 2006 Location: thousand oaks, California Posts: 732	Re: soft brake peddle so replace it all!! sound like a good plan. this truck is for my teenager so stopping is important!!!! thanks GT __________________ Greg 1953 chevy 1/2 ton 5 window, chevy 350 330 horse 700r tranz, lowering spindels mustang 2 frount. ford 9", airbags on 4 corners . purchased in 1983 for $325 while in high school http://67-72chevytrucks.com/vboard/s...=215079&page=5

02-18-2011, 08:19 PM	#4
Tink Registered User Join Date: May 2002 Location: VA Posts: 1,337	Re: soft brake peddle The rubber lines can stretch as they age causing a spongey pedal feel. Also, these trucks have never been known for super good pedal feel. __________________ 69 Chevy C10 88 Sierra 02 2500 Suburban And too many S10s to list!

02-18-2011, 09:18 PM	#5
89chevsj error 404 Join Date: Oct 2010 Location: soldotna alaska Posts: 1,252	Re: soft brake peddle i have sorta the same thing. but with a twist. my peddal seems soft in 2wd but when in 4wd seems to firm up some. it was supposed to have ABS but it doesnt work aparently... when in 2wd it seems to lock up easily though and just slide. mabey similar problems? __________________ 89 Chevy swb 350 "SJ" DD turned parts truck. SOLD 90 Chevy ext cab loooongbed. "storm trooper" Rust In Peace. 06 Kia sorento wife's car 06 charger srt8 "lucifer" my toy '12 Kia optima

02-18-2011, 10:28 PM	#6
mylow53 Registered User Join Date: Sep 2006 Location: thousand oaks, California Posts: 732	Re: soft brake peddle i think ill start will all new flex lines thanks guys GT __________________ Greg 1953 chevy 1/2 ton 5 window, chevy 350 330 horse 700r tranz, lowering spindels mustang 2 frount. ford 9", airbags on 4 corners . purchased in 1983 for $325 while in high school http://67-72chevytrucks.com/vboard/s...=215079&page=5

02-18-2011, 10:38 PM	#7
benoit454 Chris Join Date: Nov 2004 Location: Monaville, WV Posts: 3,737	Re: soft brake peddle parts are farily cheap, or maybe hit rockauto's site for better deals, I would do lines, claipers, wheel cylinders, pads, shoes, and hardware kit. Then maybe look into the dump valve for the abs or RWAL system. __________________ Chris GIT R DONE!!!!!! Check out all our rides, http://www.cardomain.com/id/benwa454

02-19-2011, 02:15 PM	#8
bwood Registered User Join Date: Jan 2003 Location: Denison, Texas Posts: 1,919	Re: soft brake peddle Make sure the rear shoes are adjusted properly against the drum. __________________ 1998 GMC Sierra SLE 1/2 ton 2WD 305 Vortec -Gibson Stainless Cat Back Swept Side -SS Wheels 2005 Honda CRF250R 2006 Honda CRF150F

02-19-2011, 05:26 PM	#9
89chevsj error 404 Join Date: Oct 2010 Location: soldotna alaska Posts: 1,252	Re: soft brake peddle drums are adjusted right. and pads and shoes are new. disks look new. probably just replace the whole system. __________________ 89 Chevy swb 350 "SJ" DD turned parts truck. SOLD 90 Chevy ext cab loooongbed. "storm trooper" Rust In Peace. 06 Kia sorento wife's car 06 charger srt8 "lucifer" my toy '12 Kia optima

02-19-2011, 06:20 PM	#10
k5hart Registered User Join Date: Nov 2002 Location: Charleston, South Carolina Posts: 1,370	Re: soft brake peddle Good luck. I've replace almost everything and it still doesn't feel great. Will stop though. Guess that's what counts. __________________ 2006 Silverado CCSB, 1939 Ford Sedan, 1962 BelAir Wagon, 1976 Vega Panel Charleston, South Carolina

02-19-2011, 08:16 PM	#11
89chevsj error 404 Join Date: Oct 2010 Location: soldotna alaska Posts: 1,252	Re: soft brake peddle its just weird i've owned alot of these trucks. but non of them had these problems. __________________ 89 Chevy swb 350 "SJ" DD turned parts truck. SOLD 90 Chevy ext cab loooongbed. "storm trooper" Rust In Peace. 06 Kia sorento wife's car 06 charger srt8 "lucifer" my toy '12 Kia optima

02-19-2011, 08:36 PM	#12
benoit454 Chris Join Date: Nov 2004 Location: Monaville, WV Posts: 3,737	Re: soft brake peddle I hear ppl over and over on other forums with these trucks especially the oldest of the body style 88,89, etc. and alot of times they too replaced everything only to find out the EH, isolation/dump valve for the RWAl system bad. http://www.aa1car.com/library/abs_kelseyhayes_rwal.htm also check out the last page or two or my thread on removing it, http://www.gmt400.com/forum/showthre...RWAL-box/page4 __________________ Chris GIT R DONE!!!!!! Check out all our rides, http://www.cardomain.com/id/benwa454

02-19-2011, 10:33 PM	#13
89chevsj error 404 Join Date: Oct 2010 Location: soldotna alaska Posts: 1,252	Re: soft brake peddle ok. thanks for the warning. i realized today out driving my Pacifica how bad the truck brakes are... too bad i had to realize that while peeling my face off the windshield haha __________________ 89 Chevy swb 350 "SJ" DD turned parts truck. SOLD 90 Chevy ext cab loooongbed. "storm trooper" Rust In Peace. 06 Kia sorento wife's car 06 charger srt8 "lucifer" my toy '12 Kia optima



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.