chevy1 Posted March 13, 2007 Report Share Posted March 13, 2007 Hi! in my 1989 2.8 cutlass supreme internationale PM III was broken I don enough money to buy new unit - I want to switch to normal vacuum powered brakes ( I find a quite good brake pump and vacuum booster from 1989 grand prix on junk yard in good price) DO I HAVE SOMETHING ELSE TO CHANGE BRAKES ??? what about brake pedal, brake stop switch??? and other thinks working with it??? thanks for any help! Quote Link to comment Share on other sites More sharing options...
Crazy K Posted March 13, 2007 Report Share Posted March 13, 2007 been there and done that. in fact... I saw a GP in yard last week that was stripped of it's firewall plate. since it was an automatic... I'm sure it was being used for a powermaster upgrade! I've done this..... YOU NEED TO LOCATE A DONOR VEHICLE. from it you must get ALL the componets that an regular car has that your car does not. fire-wall plate - requires removal of the entire dash and all HVAC components. pedal bracket assembly vac booster master cylinder - non abs is easy, But I've chose to use a 92W-body ABS system vac hose to booster vac nipple on intake Quality brake lines - I recyler excellent brake lines from a rust free donor A hole in the head. this is no easy job. but before you POWN the PMIII here's a link with info that could help you fix it. http://www.tpsgarage.com/TGP/brakes/powermaster.htm Quote Link to comment Share on other sites More sharing options...
chevy1 Posted March 13, 2007 Author Report Share Posted March 13, 2007 [quote name=Crazy K YOU NEED TO LOCATE A DONOR VEHICLE. [/quote] thanks for reply but my english is poor (i am from europe) do you mean that i could change firewall??? Quote Link to comment Share on other sites More sharing options...
Crazy K Posted March 13, 2007 Report Share Posted March 13, 2007 [quote name=Crazy K YOU NEED TO LOCATE A DONOR VEHICLE. [/quote] thanks for reply but my english is poor (i am from europe) do you mean that i could change firewall??? my bad I was still updating info. Where are you currently located? Quote Link to comment Share on other sites More sharing options...
Dark Ride Posted March 14, 2007 Report Share Posted March 14, 2007 http://www.w-body.com/forum/index.php/topic,50102.0.html Quote Link to comment Share on other sites More sharing options...
digitaloutsider Posted March 14, 2007 Report Share Posted March 14, 2007 I'm sure it was being used for a powermaster upgrade! Believe me, Powermaster to vacuum is a major downgrade, no matter how expensive PMIII parts are. The Cutlass will out-brake most cars I've been in, including the Regal. Quote Link to comment Share on other sites More sharing options...
Addicted To Boost Posted March 14, 2007 Report Share Posted March 14, 2007 before you POWN the PMIII here's a link with info that could help you fix it. http://www.tpsgarage.com/TGP/brakes/powermaster.htm x2- Use the above site! I replaced the PMIII in my TGP last fall for just a couple hundred bucks and it stops like there is no tomorrow now. Quote Link to comment Share on other sites More sharing options...
chevy1 Posted April 2, 2007 Author Report Share Posted April 2, 2007 [quote authornot. fire-wall plate - requires removal of the entire dash and all HVAC components. pedal bracket assembly do I a have to remove fire wall from other car????????????????????? Quote Link to comment Share on other sites More sharing options...
digitaloutsider Posted April 2, 2007 Report Share Posted April 2, 2007 Just fix the PMIII.... The stuff is NOT that expensive anymore. Quote Link to comment Share on other sites More sharing options...
Addicted To Boost Posted April 3, 2007 Report Share Posted April 3, 2007 Like I said before, do the PMIII swap, it isn't very expensive, and will be quite a bit easier than doing a vacuum brake swap. Quote Link to comment Share on other sites More sharing options...
Crazy K Posted April 3, 2007 Report Share Posted April 3, 2007 [quote authornot. fire-wall plate - requires removal of the entire dash and all HVAC components. pedal bracket assembly do I a have to remove fire wall from other car????????????????????? if you go that route... not the entire firewall, but the firewall plate will need to be removed from the donor, requiring all the hvac and everything being removed fromt he firewall. Quote Link to comment Share on other sites More sharing options...
Dark Ride Posted April 3, 2007 Report Share Posted April 3, 2007 From the sounds of it, chevy1, you aren't interested in the PM III, I didn't care for it either. This is my mini-write up on how to swap the PM 3 to the non-abs. The first thing you gotta do is remove the PM3 by the two bolts that hold it in place and disconnect it from the brake pedal. then you gotta pull out the steering column. Then The entire dash assembly, I had to take mine out piece by piece. Then the HVAC box and everything in it. Then you must remove the firewall plate, I had to be very careful because I couldn't get the back of the HVAC out so it was still kinda holding it in. Some bolts on the plate must be taken out from the engine compartment, some must be taken out from the passenger area. Then put the non-abs firewall plate in very carefully, sliding it between the HVAC and into the firewall. Then Reverse of Removal. You asked about the parts needed from the donor vehicle, you will need to pull the firewall plate, i don't think its even possible to swap the entire firewall, the firewall plate holds the brake booster and master and goes down to below where the steering column goes through the firewall. Its not a fun project but i like the simplicity of the non-abs master cylinder better. You may need the brake mount that connects to the firewall, I don't remember if i used mine from the donor vehicle or not. You'll need the brake pedal itself as well. Since I don't plan on driving my TGP in the winter its not a big deal. But to each his own, obviously some people here prefer the PM III. Quote Link to comment Share on other sites More sharing options...
chevy1 Posted May 15, 2007 Author Report Share Posted May 15, 2007 From the sounds of it, chevy1, you aren't interested in the PM III, I didn't care for it either. THANKS FOR EVERY ONE !!! my mechanic made a swap! I HAVE a BRAKES :smile: Quote Link to comment Share on other sites More sharing options...
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