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89 Beater
Dodge Dakota
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2/20/2006
17:11:48

Subject: brake booster...
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I just lost power brakes yesterday. When I step on the pedal I can hear a steady hissing noise near where the plunger goes through the firewall. I no longer have power breaks. I can stop the truck fine but the pedal is like a rock and that hissing noise comes from under the firewall the entire time I have the pedal depressed. Should I assume the power break booster has gone bad? If so...how hard of a job is this to fix in the driveway?




Booster
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2/20/2006
22:47:03

RE: brake booster...
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"Should I assume the power break booster has gone bad? If so...how hard of a job is this to fix in the driveway? "

I have the same truck if its a V6.

I wouldn't know what is the problem. I have never had that experience before. However, I was looking the service manual for mine and as well as your truck. They simple state that it runs off of the vacuum lines and pressure built up from the intake manifold and the surrounding atmospheric pressure. So, my guess would be similar to yours... probably the booster or maybe a gasket or hose connection. ( Just a guess)

Looking at removing and installing a booster it looks pretty simple, just might be crammed for space maybe.

Hope this helps,

- Matt





89 Beater
Dodge Dakota
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2/21/2006
09:30:59

could be...
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Hey matt...thanks for the reply. I guess there isn't too much else that it could be. But I'm not a mechanic. what struck me as odd is the Haynes manual says "special tools are required to replace the power brake booster." I looked all over the place and the only odd spot I could find was the pin that holds the plunger to the pedal. Other than that...It looks like standard old screws and nuts in hard to reach places. lol. Looks like a knuckle buster job doesn't it?



Matt
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2/21/2006
16:25:54

RE: brake booster...
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Fellow Beater, hey. A lot of times the manuals are right you do need special tools. But I swear every job I do on this truck needs special tools. Most jobs I have found you can still do. Often if I get stuck because of special tool situation I ended up figuring a way out. And better yet, the times I did need a 'special' tool I have found them as basics sold at any mechanic store. Why not give it try. You might save some money.

On another note, I am pressed for time. My beater just acted up again. Making some funny squealing noise from the tranny area. Every thing is running ok, except for that the diagnostic brake light has come on. It says to ground the RWAL diagnostic connector and it will flash out the codes. Did some thing of the sort and no luck. Think I'll post a question on that.

Good luck if you do decide to work on your truck yourself. It doesn't look too bad.

-Matt



daddio
Dodge Dakota
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2/21/2006
16:30:28

RE: brake booster...
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you'll want to use a line/flare nut wrench to undo the brake lines from the master cylinder if you have to. i haven't looked at mine close enough to tell if you can take out the booster without taking the master cyl out of the way.



89 Beater...
Dodge Dakota
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2/21/2006
22:25:36

RE: brake booster...
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...yea...the Master Cylinder needs to come off the booster to replace the booster itself. And figure this out...a new booster AND master cylinder combo costs 70 dollars but *just* a booster with NO master cylinder is nearly 90. Go figure. lol. Anyway...all this plus my anti-lock brake light and brake light are still on from when the master cylinder died 2 months ago. Dang dealer '5 star service center' couldn't fix that. I think they didn't bleed them right and the RWAL valve switch is sensing the pressure differential in the lines. (air in one somewhere) It's my understanding 89 was the first year Dodge put ABS in these trucks. I guess it's up to us to work out the kinks. lol.



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