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Unread 05-11-2013, 06:24 PM   #1
phil1330
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NO Brakes in 4LOW

I dropped the jeep off at the shop to get gears installed front and rear the other day. The shop did the job but when i got in the jeep to test drive it the brakes were very weak.

I took the calipers off of the front and cleaned them with brake cleaner thinking the shop guys got there greasy *** hands all over the brake pads. And yes there was a little.

any ways the jeep stops ok on pavement in 2wd. It stops a little worse in 4 high, but it will not stop at all in 4 low. WTF!

Here's the set up. 88 wrangler w/95 booster and master cylinder. New brakes on all four corner.

What's the fix here guys?

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Unread 05-11-2013, 07:42 PM   #2
Reno72
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Is the pedal firm? Could it need bleeding. How about your booster, everything hooked up? In 4low it always seems the brakes aren't as strong, when you say it won't stop are you saying you feel no brake action or they just seem really weak?
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Unread 05-11-2013, 09:15 PM   #3
phil1330
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Quote:
Originally Posted by Reno72 View Post
Is the pedal firm? Could it need bleeding. How about your booster, everything hooked up? In 4low it always seems the brakes aren't as strong, when you say it won't stop are you saying you feel no brake action or they just seem really weak?
Nah when i say it will not stop in 4 low i mean i would be out of complete control of jeep on a down hill trail. That brake pedal is down to the metal. And i did bleed the brakes first b4 i cleaned the pads and rotors.(forgot to post that)

And yea the pedal feels ok but not as firm as it should i think.

booster is hooked up properly and vacuum line is secure with no leaks
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Unread 05-11-2013, 09:31 PM   #4
OKwranglerYJ
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Make sure your bleeders are on top
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Unread 05-12-2013, 06:07 AM   #5
Mark05059
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If you took it to a shop... stop working on it and take it back to THEM so they can fix it. They messed it up.. they should make it right.
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Unread 05-12-2013, 08:11 AM   #6
Dirttracker18
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I see no reason for the shop to touch anything to do with the brakes when changing gears.

I would have to think the two are unrelated.

In addition there is no relationship between your brakes and your transfer case.
Switching to 4low cannot affect your brakes. It may amplify an existing problem though.
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Unread 05-12-2013, 08:28 AM   #7
Xpress
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Air in the lines still. Or the master cylinder is bad.
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Unread 05-12-2013, 10:57 AM   #8
phil1330
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Quote:
Originally Posted by Dirttracker18 View Post
I see no reason for the shop to touch anything to do with the brakes when changing gears.

I would have to think the two are unrelated.

In addition there is no relationship between your brakes and your transfer case.
Switching to 4low cannot affect your brakes. It may amplify an existing problem though.
yea the guys at the shop said they did nothing to brake system.
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Unread 05-12-2013, 10:59 AM   #9
phil1330
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Quote:
Originally Posted by Xpress View Post
Air in the lines still. Or the master cylinder is bad.
that was one of my thoughts. either the master cylinder or the booster. but i just didn't want to start throwing parts at it.
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Unread 05-12-2013, 01:04 PM   #10
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Quote:
Originally Posted by Dirttracker18 View Post
I see no reason for the shop to touch anything to do with the brakes when changing gears.

I would have to think the two are unrelated.

In addition there is no relationship between your brakes and your transfer case.
Switching to 4low cannot affect your brakes. It may amplify an existing problem though.
They had to pull the axles to change the gears. To do that they had to remove the brakes.

Dwayne
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Unread 05-12-2013, 02:19 PM   #11
Dirttracker18
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Quote:
Originally Posted by 4.7stroker View Post
They had to pull the axles to change the gears. To do that they had to remove the brakes.

Dwayne
True I guess "not touch" is overstated. They shouldn't do anything to the system. Pull the calipers, pull the rotors, do the change and put back together. You shouldn't even need to press the caliper, just slip them back on.

However you got me thinking. If the tech was less then professional, he may have left the rotors dangling from the hoses. That could cause some issues.
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Unread 05-12-2013, 03:05 PM   #12
phil1330
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Quote:
Originally Posted by Dirttracker18 View Post
he may have left the rotors dangling from the hoses. That could cause some issues.
calipers dangling could cause what kind of issues?
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Unread 05-12-2013, 03:45 PM   #13
Dirttracker18
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Stretching of the hose which could cause a leak or damage the hose allowing expansion causing a soft peddle.

You should never let the calipers hang by the hose.
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Unread 05-12-2013, 04:15 PM   #14
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I've seen axles flexed so that the brake lines were so tight you could play a tune on them and were not leaking. As much as I would advise against dangling calipers, its not gonna kill anything.
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Unread 05-12-2013, 05:14 PM   #15
OKwranglerYJ
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If they took the calipers off and tossed them in a pile then they could have switched them and if they did you wouldn't be able to bleed them properly.
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