Topic: Braking question

[olemisstoy88]

I have no pressure in the pedal. it just goes to the floor. thus I have no brakes. I gotta figure out what the problem is.  I have bled the brakes in order (including the load sensing valve) 3 times in the last 4 days.


 today had close call on the way to autozone. I bought and installed a master cyl. Same problem only when the truck is off I have pressure. b4 I had none even with the truck off. Now I have pressure when the truck is off after I pump it up. I went back to AZ and they said it was my slave cyl. so I bought one of those. I have an slipomatic still till wed. where I begin the swap to 5speed. this is my daily driver so I have to take it to work everyday. I really need to figure out whats up. I bleed the whole truck after the master cyl install. very little air in the lines prolly from the master install. Is there a slave cyl on my truck for the brakes? and if so where is it?

Is there some thing I am missing?  Please help.

[jimbo74]

there is not a slave cylinder for the brake system, the cylinders are actually mounted on the wheels as a wheel cylinder (on the rears) or calipers up front

as far as MCs go, parts from autozone like that suck, and are defective about 85% of the time..... its also very possible during bleeding of hte new mc that you blew it out, it happens quite frequently on the mcs from az and hte like

[DTB]

I wouldnt put my life in the hands of Autozone. just my 

[olemisstoy88 [OP]]

yeah, I have know the guys up there for 9 years we hang out and stuff, so I figured they would not steer me this bad. I guess I might just have to take it to the shop. and return the non existant slave cyl.... yeah the mc that was in there was frm az or atleast it was a reman. so shoud I just get a new mc and do that all again? My pedal pressure did improve while the truck was off. butnot when the truck was on.
Or should I just take it in to the shop and stick with the slipomatic for 2 more weeks?

[olemisstoy88 [OP]]

yeah I would get parts from somewhere esle but the only other place is the stealership.

[AKDuramax]

yeah i second the auto zone comment
but about you r breaks are you loosing fluid?? cause on my truck the caliperare leaking and that causes the same problem on my truck that you are describing so even if its alittle ass leak it can allo air into your system so check that

[olemisstoy88 [OP]]

could it have anything to do with the load valve thing? mines still there, but I have thought about loping it off.....

[IronClad]

yer booster could also be going bad..  when mine went bad i had peddle pressure with the truck off.. soon as i started the truck i had none.. straight to the floor like nothing was connected to the peddle.  this is with a  1 1/4 corvette MC too.  switched my booster and everything came back

[olemisstoy88 [OP]]

yeah i second the auto zone comment
but about you r breaks are you loosing fluid?? cause on my truck the caliperare leaking and that causes the same problem on my truck that you are describing so even if its alittle ass leak it can allo air into your system so check that

I will check the calipers tommorw.  The rears are not. The lines from the back to atleast trans arent either. I looked  there on my search for the elusive slave cyl.

[olemisstoy88 [OP]]

yer booster could also be going bad.. when mine went bad i had peddle pressure with the truck off.. soon as i started the truck i had none.. straight to the floor like nothing was connected to the peddle. this is with a 1 1/4 corvette MC too. switched my booster and everything came back

thats what I am afraid of.  I was thinking that but could not get a straight answer.
I have never messed with the booster is it difficult to change?

[IronClad]

its fairly easy.. just unbolt the MC from it  then inside  there is 4 nuts  and the pin for the brake peddle

[olemisstoy88 [OP]]

I am starting on the swap. can I use a clutch/brake pedal in a auto truck. till I finish the rest of the swap? cause I will be messing with that area any ways. I wonder if I can or should I just do all of this at one time?

[IronClad]

might aswell just go ahead and swap in the clutch/brake assym since yer in that area  i dont see how it would matter.  you will have to cut the appropirate holes for the studs/ clutch MC though

[olemisstoy88 [OP]]

yeah  I need to get a hold of a truck/4runner about the same year to measure for the holes and to see where the clutch lines go and for the stick.