I have a 95 YJ 2.5L with 4" lift springs and a spring over kit running 4:56 gears and 33" tires. The pedal isn't mushy, just seems like there's no power in the brakes. I have flushed the brake lines, replaced the rear wheel cylinders at the rear. Not sure what else to do. Any advice???
Stay behind Honda's, they make good emergency brakes with little damage to your Jeep. Or you could go disc in back, new Master cylinder, better rotors. With the weight of bigger tires my jeep never felt like it could stop very well.
I have put drilled and slotted rotors on the front with good heavy duty pads and used good heavy duty shoes in the rear. I have heard mention that you could use the power booster from a 97 dodge dakota pick up for better breaking power have you heard anything like that?
You already have a 95 so what's up. Try adjusting the rear brakes and your emergency brake. Check the front calipers are working and the rotors are good. The rotor surfaces should be close to smooth with no discoloration as in rainbow colors showing they have been overheated at least once. Bleed the rear brakes and check the force of the fluid flow. If it is weak there could be an issue with the rear cylinders or the proportion ing valve by the Master cylinder.
Yea it surely sounds like you need to adjust rear brakes. Before you go changing out the master, did you do a brake flush (aka) change out the old fluid ? I would do a flush and clean and adjust the rears and see how that feels. If not you might have a bad master or a seized up front caliper.
I was on that train of thought already, i replaced both rear wheel cylinders, and put new drilled and slotted rotors on the front with new heavy duty shoes and pads all the way around. I flushed my break lines and adjusted my rear breaks. I didnt know the proprtioning valves went bad. I was figuring more on the brake booster or master cylinder.
How close did you adjust the rear shoes? Why did you do brakes in the first place ? Were the brakes grinding or squeaking ? It might be that it's operating normally but expected a difference in braking power after you upgraded the brakes?
What is your definition of suck or what are you comparing it too? I can still lock some of the tires up on my 88 with the 33x12.50's if I really try, but I also put new brakes on all 4 corners 10k miles ago. You are trying to stop around 300lbs of large rotating tires/wheels that have a massive amount of momentum with small 11 inch rotors and drums. My Duratracs weigh 50lbs each, 15x8 steel wheel is 30lbs 15x8 alloy wheel is 20lbs. Civics have the same size brakes as a YJ and are 4 wheel disc and are only trying to stop 140lbs of tire/wheel. Your stock brakes are just going to suck, but if it is unsafe to drive you have something wrong. Do you down shift when you brake or are you coasting in neutral?
Have you checked the vacuum booster? With the Jeep off pump the brake pedal until it becomes firm, then keep it depressed. Start the Jeep and if the pedal goes to the floor more the booster is still good.
I replaced th breaks because they were worn, it was time. and i adjusted them to the point where they just stopped rubbing on the drum. they were slightly weak but as expected with 33's. After running it over there is almost no stopping to the point i wont drive it.
I didnt know i could check the booster like that, thank you that will be the next step, but it is definetly not safe to drive at this point.
You need to get a brake booster from a 95 4.0. Its more powerful than the one we have stock on the 2.5. I switched mine to a 95 4.0 double diaphram brake booster and I can lock my 33x12.5's up anytime I want. I still have an all stock brake system with the exception of the booster. It is a direct bolt on swap with no mods needed.
1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.
[QUOTE=Magnum;14117863] I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim[/QUOTE]
[QUOTE=ldso;16498409]. It started with a $200 axle, and a few thousand dollars later I was done :)[/QUOTE]
[QUOTE=Luuca;16122017]diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.
Ask me how I know...[/QUOTE]
[QUOTE=Overhead;17658665]this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.[/QUOTE]
Any chance the drums may be at their max inner diameter? They can still look good but if they are worn and too large, the wheel cylinders may be at or near the end of their travel, and not be able to apply enough force to the drum.