Did I screw up my truck?...

[hoohah797]

So, the last time I drove my truck, it was the in the middle of a torrential downpour. Well, I parked her for about a week with the e-brake set. Well I wasn't thinking and the rear brakes seized. When I moved her today, I used 4 LO to get her rolling. The rear wheels stayed locked and the rear wheels left skids on my driveway for about a foot - 1.5 feet and then the brakes broke free. Bottom line, I'm not sure how the front wheels were able to move when the rear wheels were not and did I screw up my truck since basically only the front wheels were driving the vehicle? Thanks for the input...

 

[crusin93]

No. Worse case serneio you may need to pull the rear wheels to "tap" the brake drum. Use a heavy dead blow mallet as not to damage any parts. Most likely, they will free up by alternating between drive and reverse a few times in 2wd.

 

[Ranger Sport Honduras]

No. Worse case serneio you may need to pull the rear wheels to "tap" the brake drum. Use a heavy dead blow mallet as not to damage any parts. Most likely, they will free up by alternating between drive and reverse a few times in 2wd.

yeah our trucks usually do that. a good tire kick and rocking it back and forth in 1st and reverse and they break free lol.

seems like the rear brake pads get stuck due to humidity when u put the parking brake and they are wet.

 

[hoohah797]

Whats got me worried is that 4 wheel seemed to just push the truck back. The rear wheels weren't spinning, would this damage the 4WD?

 

[Captain Ledd]

Try it in reverse for a bit. I've noticed my parking brake works CONSIDERABLY less for reverse. I gotta be real careful parking on hills with the nose pointed up.

 

[UrbanRedneckKid]

Is anybody listening to what he's saying.... This is a drivetrain issue, not about the brakes. The truck should not have been able to drag the rear tires while in 4wd.

Sounds screwed up to me, unless one mark was from dragging and the other from spinning faster than the front... dunno

 

[Captain Ledd]

Well if one wheel is stuck (like the drivers side), I'm pretty sure the other side still wouldn't be traveling the same speed as the rest of the truck (1/2 speed?), leaving 2 skid marks.

Or we're people watching to verify that neither rear wheel spun?

I remember the principle from playing with Lego's many years back, at least I think that's how it works?.

 

[necessaryevil]

what about the rear diff? if it is an open diff then the power would transfer to to open wheel while the locked up wheel would not receive any power, right?

 

[hoohah797]

There is a pair of skid marks, from both rear tires. However, the driver's side tire appears to be darker and longer. The mark from the pass side tire is lighter. I'm assuming then, the driver's side must have locked and the power went to the pass side, but was still moving slower than the front wheels, causing the pass side skid. This sound feasible? At least thinking this is making me feel better.

 

[adsm08]

Well, its always possible to damage the 4x4 system in a situation like that. That def isn't how I would have gone about getting the wheels broken free.

What it sounds like to me is that you did have one rear wheel frozen, and one spinning, but a lot slower than the front. Thing is, the T-case isn't a differential. It's a locked system. Either the front or rear wheels can slip some to let them all spin at the same speed, or the driveline is winding up, allowing for potential damage.


I did drive my dad's truck almost 50 miles on the dry highway with it locked in 4x4 without hurting anything too badly though. Odds are that you didn't do any serious damage.

 

[heptofite]

you have it backwards guys

one tire on the rear was locked, the other was spinning TWICE AS FAST AS the front. Differentials 101 here guys.

one mark was from dragging, the other was from doing a burnout.

 

[LearjetMinako]

you have it backwards guys

one tire on the rear was locked, the other was spinning TWICE AS FAST AS the front. Differentials 101 here guys.

one mark was from dragging, the other was from doing a burnout.

Makes sense. On my R/C vehicles, any time I stop one wheel from spinning, the opposite wheel instantly spins faster. On the 4wd one (no center diff), the front wheels stay the speed when I do the same thing to one of the rear wheels.

My Ranger did this once. Thou mines a 2wd. It did when it was covered in over 1" of freezing rain. Tried a few times going forward and reverse with increasing clutch pressure and throttle. Then I said "F it", and rev-ed the engine and popped the clutch in Reverse. Broke free then.

 

[TheTopher]

you have it backwards guys

one tire on the rear was locked, the other was spinning TWICE AS FAST AS the front. Differentials 101 here guys.

one mark was from dragging, the other was from doing a burnout.

Somebody's got it!



I'd throw her on 4 jack stands and have a buddy rev the engine while you watch the wheels for a simple test.

 

[trail B2]

What helps me wrap my head around the differential thing is the ring and pinion turn the pin and spider gears end over end.These hook to the axle gears spinning two axle gears from the ring gear as it does this the spider gears don't turn.When you stop one tire.The ring gear still turns the free side but the stopped side motion spins the spider gears making the free tire spin twice as fast.

 

[straycat]

So, the last time I drove my truck, it was the in the middle of a torrential downpour. Well, I parked her for about a week with the e-brake set. Well I wasn't thinking and the rear brakes seized. When I moved her today, I used 4 LO to get her rolling. The rear wheels stayed locked and the rear wheels left skids on my driveway for about a foot - 1.5 feet and then the brakes broke free. Bottom line, I'm not sure how the front wheels were able to move when the rear wheels were not and did I screw up my truck since basically only the front wheels were driving the vehicle? Thanks for the input...

This has happened to me after driving in heavy rain and going through some deep water on the roads some time back. I park it and I set the parking brake and it is always hard to get it to back up. So....now I don't set the parking brake in the garage after driving in a heavy rain. If you park on an incline that is going to be different of course....you can chock a rear wheel after you park it.