2004 4Runner V8 LTD. It's been sitting about 2 months as I waited to replace the front bumper (deer strike on the outside edge of the bumper cover, where there isn't any metal 
)
When I drive it, it feels like I'm dragging a trailer or something. Oh well, I figure, since I have new rear calipers, the one had been hung up a while back and I did a rebuild on it. So both rear wheels now have new calipers.
My 4Runner has disc brakes in rear AND rear drums for emergency brake.
The passenger rear wheel actually skidded a little going downhill in neutral, trying to test it at about 5 mph on light gravel. I didn't have the brakes applied.
The vehicle will actually stop when in neutral on a slight downhill grade.
Here's what I've done to try to isolate the problem.
1. About 100yds test area, downhill in neutral, vehicle slows and once skidded the rear passenger wheel on loose gravel (very slow coasting)
2. Pulled RR tire and wheel to inspect emergency brake. A little dust and stuff, but works well. Cleaned it all up and backed the adjuster all the way off for testing. It goes on smoothly and returns smoothly (one shoe) when applying the emergency brake pedal and the wheel and hub is pulled.
3. I disconnected the RR brake hydraulic line and let it hang and repeated the test. I haven't been able to repeat the wheel skid, but vehicle still pulls to the right and has a noticeable drag.
4. Switching to reverse takes a bit of pedal, again acts like I have a load attached.
5. I do have a brake controller with oem harness connector, but no trailer attached.
6. It shifts into 4Lo and back to 4Hi (AWD) smoothly and has the same symptoms.
7. I don't get any traction or ABS lights during these troubles
This isn't a new problem after the new calipers, but they didn't fix the problem. I didn't troubleshoot before installing them because I thought (!) that was the problem and would resolve the issue.
I noticed the last few times I drove it (before today) a slight burning rubber smell. I can't see anything rubbing or leaking, though I am parked on gravel and a leak would be hard to notice.
I replaced a front left wheel bearing a few years back, but no big deal. I replaced a front right CV boot about the same time (stick punctured it)
I have the MAINT light on for oil change, though I didn't pull the codes yet. Of course the TPMS light is still on for the past few years
My tires are 1" larger profile, and barely rub on extreme turn, but nothing bad.
She has about 130k and I had the WS tranny fluid and screen changed about 104k via the cooler lines.
I have hauled heavy, and pulled heavy trailers, but not for nearly a year. She isn't all caked up with mud or anything, either, though we do go mild offroading at times.
I have never changed the rear differential fluid, it's been on my list for a while
I don't hear any squeeling or noises from the rear end. The ride is smooth, no hoopties like a bend axle would do or anything.
This is the full time 4wd (AWD) model, so I can't just jack up the rear end and spin the wheels. No way to disengage from the tranny to isolate rear trouble from tranny troubles.
Any suggestions how to troubleshoot and isolate this problem, short of pulling the rear universal to drop the rear driveshaft?
We are supposed to leave Sat for a 2 week camping trip and this is my TV. (And it needs inspected)
Thanks!
)When I drive it, it feels like I'm dragging a trailer or something. Oh well, I figure, since I have new rear calipers, the one had been hung up a while back and I did a rebuild on it. So both rear wheels now have new calipers.
My 4Runner has disc brakes in rear AND rear drums for emergency brake.
The passenger rear wheel actually skidded a little going downhill in neutral, trying to test it at about 5 mph on light gravel. I didn't have the brakes applied.
The vehicle will actually stop when in neutral on a slight downhill grade.
Here's what I've done to try to isolate the problem.
1. About 100yds test area, downhill in neutral, vehicle slows and once skidded the rear passenger wheel on loose gravel (very slow coasting)
2. Pulled RR tire and wheel to inspect emergency brake. A little dust and stuff, but works well. Cleaned it all up and backed the adjuster all the way off for testing. It goes on smoothly and returns smoothly (one shoe) when applying the emergency brake pedal and the wheel and hub is pulled.
3. I disconnected the RR brake hydraulic line and let it hang and repeated the test. I haven't been able to repeat the wheel skid, but vehicle still pulls to the right and has a noticeable drag.
4. Switching to reverse takes a bit of pedal, again acts like I have a load attached.
5. I do have a brake controller with oem harness connector, but no trailer attached.
6. It shifts into 4Lo and back to 4Hi (AWD) smoothly and has the same symptoms.
7. I don't get any traction or ABS lights during these troubles
This isn't a new problem after the new calipers, but they didn't fix the problem. I didn't troubleshoot before installing them because I thought (!) that was the problem and would resolve the issue.
I noticed the last few times I drove it (before today) a slight burning rubber smell. I can't see anything rubbing or leaking, though I am parked on gravel and a leak would be hard to notice.
I replaced a front left wheel bearing a few years back, but no big deal. I replaced a front right CV boot about the same time (stick punctured it)
I have the MAINT light on for oil change, though I didn't pull the codes yet. Of course the TPMS light is still on for the past few years
My tires are 1" larger profile, and barely rub on extreme turn, but nothing bad.
She has about 130k and I had the WS tranny fluid and screen changed about 104k via the cooler lines.
I have hauled heavy, and pulled heavy trailers, but not for nearly a year. She isn't all caked up with mud or anything, either, though we do go mild offroading at times.
I have never changed the rear differential fluid, it's been on my list for a while
I don't hear any squeeling or noises from the rear end. The ride is smooth, no hoopties like a bend axle would do or anything.
This is the full time 4wd (AWD) model, so I can't just jack up the rear end and spin the wheels. No way to disengage from the tranny to isolate rear trouble from tranny troubles.
Any suggestions how to troubleshoot and isolate this problem, short of pulling the rear universal to drop the rear driveshaft?
We are supposed to leave Sat for a 2 week camping trip and this is my TV. (And it needs inspected)
Thanks!
