Jerry McG

> Check the caliper bolts/slides to see if they are worn and have notches.>

They looked like new.

> Dirt or sludge in the caliper bore can prevent the piston from returning
when you let off the brake. Or the piston seal could be catching. Hard to
tell without taking it apart.>

Must have gotten soemthing in the piston bore. Weird part is they don't grab
or pull to the right when braking. I'm guessing they release but not all
the way.
> --
> DougW
>
>
>
>

Jerry McG

> Check the caliper bolts/slides to see if they are worn and have notches.>

They looked like new.

> Dirt or sludge in the caliper bore can prevent the piston from returning
when you let off the brake. Or the piston seal could be catching. Hard to
tell without taking it apart.>

Must have gotten soemthing in the piston bore. Weird part is they don't grab
or pull to the right when braking. I'm guessing they release but not all
the way.
> --
> DougW
>
>
>
>

Jerry McG

> Check the caliper bolts/slides to see if they are worn and have notches.>

They looked like new.

> Dirt or sludge in the caliper bore can prevent the piston from returning
when you let off the brake. Or the piston seal could be catching. Hard to
tell without taking it apart.>

Must have gotten soemthing in the piston bore. Weird part is they don't grab
or pull to the right when braking. I'm guessing they release but not all
the way.
> --
> DougW
>
>
>
>

RoyJ

As the other posters said: check the slides that let the caliper float
from side to side. There is supposed to be enough runout in the rotor to
tap the fixed side caliper away from the rotor, the puck side gets
moved out the same way. Stop at your local parts store and ask for the
special lube for the pins. Very high temp stuff, comes in a tiny squeeze
packet like ketchup at the fast food joint.

Jerry McG wrote:
> Hey, I discovered today that the hybrid GM/Ford brakes on my front Dynatrac
> D44 are dragging slightly on the right side. I've been noticing over the
> past few weeks a tendency for the Jeep to drift to the right slightly.
> Figured I knocked something out of spec on the rocks. Today I drove it about
> 50 miles to the trails above Silverton, CO and it was acting unusually
> squirrelly on the mountain roads heading up there, pulling to the right. I
> started to wonder if a bearing was going in the right front, so when I got
> to town I put my hand on the right front hub and it was hot as Hell, while
> the left front was cool. I headed back home, pulled the r.f. wheel and found
> the right side pads worn about twice those on the left. All this wear seems
> to have happened in the last few weeks. I pulled the right front hub/rotor
> and the bearings were perfect. I went ahead and cleaned & repacked them and
> reinstalled everything with a new seal.
> The piston on the right front caliper seemed a bit hard to open up, so it
> seems it's applying ok, but not releasing completely. Oddly the brakes never
> pull one way or the other, always stop straight & true, no squeals, etc.
>
> Dynatrac said the calipers are for a 1971 - 78 Chevy/GMC K10/K20 pickup,
> while the rotors are from a '79 F250. Anyone ever had any trouble with these
> GM calipers? It's a real bummer, as the brakes have been great up until now
> and I can't figure what might have happened. The fluid is fresh and nothings
> been whacked. Any ideas are welcomed, as it is I'll head to the NAPA store
> for a rebuilt caliper tomorrow.
>
>

RoyJ

As the other posters said: check the slides that let the caliper float
from side to side. There is supposed to be enough runout in the rotor to
tap the fixed side caliper away from the rotor, the puck side gets
moved out the same way. Stop at your local parts store and ask for the
special lube for the pins. Very high temp stuff, comes in a tiny squeeze
packet like ketchup at the fast food joint.

Jerry McG wrote:
> Hey, I discovered today that the hybrid GM/Ford brakes on my front Dynatrac
> D44 are dragging slightly on the right side. I've been noticing over the
> past few weeks a tendency for the Jeep to drift to the right slightly.
> Figured I knocked something out of spec on the rocks. Today I drove it about
> 50 miles to the trails above Silverton, CO and it was acting unusually
> squirrelly on the mountain roads heading up there, pulling to the right. I
> started to wonder if a bearing was going in the right front, so when I got
> to town I put my hand on the right front hub and it was hot as Hell, while
> the left front was cool. I headed back home, pulled the r.f. wheel and found
> the right side pads worn about twice those on the left. All this wear seems
> to have happened in the last few weeks. I pulled the right front hub/rotor
> and the bearings were perfect. I went ahead and cleaned & repacked them and
> reinstalled everything with a new seal.
> The piston on the right front caliper seemed a bit hard to open up, so it
> seems it's applying ok, but not releasing completely. Oddly the brakes never
> pull one way or the other, always stop straight & true, no squeals, etc.
>
> Dynatrac said the calipers are for a 1971 - 78 Chevy/GMC K10/K20 pickup,
> while the rotors are from a '79 F250. Anyone ever had any trouble with these
> GM calipers? It's a real bummer, as the brakes have been great up until now
> and I can't figure what might have happened. The fluid is fresh and nothings
> been whacked. Any ideas are welcomed, as it is I'll head to the NAPA store
> for a rebuilt caliper tomorrow.
>
>

RoyJ

As the other posters said: check the slides that let the caliper float
from side to side. There is supposed to be enough runout in the rotor to
tap the fixed side caliper away from the rotor, the puck side gets
moved out the same way. Stop at your local parts store and ask for the
special lube for the pins. Very high temp stuff, comes in a tiny squeeze
packet like ketchup at the fast food joint.

Jerry McG wrote:
> Hey, I discovered today that the hybrid GM/Ford brakes on my front Dynatrac
> D44 are dragging slightly on the right side. I've been noticing over the
> past few weeks a tendency for the Jeep to drift to the right slightly.
> Figured I knocked something out of spec on the rocks. Today I drove it about
> 50 miles to the trails above Silverton, CO and it was acting unusually
> squirrelly on the mountain roads heading up there, pulling to the right. I
> started to wonder if a bearing was going in the right front, so when I got
> to town I put my hand on the right front hub and it was hot as Hell, while
> the left front was cool. I headed back home, pulled the r.f. wheel and found
> the right side pads worn about twice those on the left. All this wear seems
> to have happened in the last few weeks. I pulled the right front hub/rotor
> and the bearings were perfect. I went ahead and cleaned & repacked them and
> reinstalled everything with a new seal.
> The piston on the right front caliper seemed a bit hard to open up, so it
> seems it's applying ok, but not releasing completely. Oddly the brakes never
> pull one way or the other, always stop straight & true, no squeals, etc.
>
> Dynatrac said the calipers are for a 1971 - 78 Chevy/GMC K10/K20 pickup,
> while the rotors are from a '79 F250. Anyone ever had any trouble with these
> GM calipers? It's a real bummer, as the brakes have been great up until now
> and I can't figure what might have happened. The fluid is fresh and nothings
> been whacked. Any ideas are welcomed, as it is I'll head to the NAPA store
> for a rebuilt caliper tomorrow.
>
>

RoyJ

As the other posters said: check the slides that let the caliper float
from side to side. There is supposed to be enough runout in the rotor to
tap the fixed side caliper away from the rotor, the puck side gets
moved out the same way. Stop at your local parts store and ask for the
special lube for the pins. Very high temp stuff, comes in a tiny squeeze
packet like ketchup at the fast food joint.

Jerry McG wrote:
> Hey, I discovered today that the hybrid GM/Ford brakes on my front Dynatrac
> D44 are dragging slightly on the right side. I've been noticing over the
> past few weeks a tendency for the Jeep to drift to the right slightly.
> Figured I knocked something out of spec on the rocks. Today I drove it about
> 50 miles to the trails above Silverton, CO and it was acting unusually
> squirrelly on the mountain roads heading up there, pulling to the right. I
> started to wonder if a bearing was going in the right front, so when I got
> to town I put my hand on the right front hub and it was hot as Hell, while
> the left front was cool. I headed back home, pulled the r.f. wheel and found
> the right side pads worn about twice those on the left. All this wear seems
> to have happened in the last few weeks. I pulled the right front hub/rotor
> and the bearings were perfect. I went ahead and cleaned & repacked them and
> reinstalled everything with a new seal.
> The piston on the right front caliper seemed a bit hard to open up, so it
> seems it's applying ok, but not releasing completely. Oddly the brakes never
> pull one way or the other, always stop straight & true, no squeals, etc.
>
> Dynatrac said the calipers are for a 1971 - 78 Chevy/GMC K10/K20 pickup,
> while the rotors are from a '79 F250. Anyone ever had any trouble with these
> GM calipers? It's a real bummer, as the brakes have been great up until now
> and I can't figure what might have happened. The fluid is fresh and nothings
> been whacked. Any ideas are welcomed, as it is I'll head to the NAPA store
> for a rebuilt caliper tomorrow.
>
>

DougW

Jerry McG did pass the time by typing:
>> Check the caliper bolts/slides to see if they are worn and have notches.>
>
> They looked like new.

The wear is teeny tiny, just enough so the caliper tends to float to
one side and drag the disc. run a fingernail along the slide, that will
let you know quickly.

>> Dirt or sludge in the caliper bore can prevent the piston from returning
> when you let off the brake. Or the piston seal could be catching. Hard to
> tell without taking it apart.>
>
> Must have gotten soemthing in the piston bore. Weird part is they don't grab
> or pull to the right when braking. I'm guessing they release but not all
> the way.

Long shot, but if you wheel where it's muddy, dirt can build up behind the pad
and it won't retract properly, the heat then cooks the mud solid. Usually the
brake shield and tire rim keeps debris out.

DougW

Jerry McG did pass the time by typing:
>> Check the caliper bolts/slides to see if they are worn and have notches.>
>
> They looked like new.

The wear is teeny tiny, just enough so the caliper tends to float to
one side and drag the disc. run a fingernail along the slide, that will
let you know quickly.

>> Dirt or sludge in the caliper bore can prevent the piston from returning
> when you let off the brake. Or the piston seal could be catching. Hard to
> tell without taking it apart.>
>
> Must have gotten soemthing in the piston bore. Weird part is they don't grab
> or pull to the right when braking. I'm guessing they release but not all
> the way.

Long shot, but if you wheel where it's muddy, dirt can build up behind the pad
and it won't retract properly, the heat then cooks the mud solid. Usually the
brake shield and tire rim keeps debris out.

DougW

Jerry McG did pass the time by typing:
>> Check the caliper bolts/slides to see if they are worn and have notches.>
>
> They looked like new.

The wear is teeny tiny, just enough so the caliper tends to float to
one side and drag the disc. run a fingernail along the slide, that will
let you know quickly.

>> Dirt or sludge in the caliper bore can prevent the piston from returning
> when you let off the brake. Or the piston seal could be catching. Hard to
> tell without taking it apart.>
>
> Must have gotten soemthing in the piston bore. Weird part is they don't grab
> or pull to the right when braking. I'm guessing they release but not all
> the way.

Long shot, but if you wheel where it's muddy, dirt can build up behind the pad
and it won't retract properly, the heat then cooks the mud solid. Usually the
brake shield and tire rim keeps debris out.