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Driveline Drag?

05silvycrew

By 05silvycrew
in Ask A GM Technician

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05silvycrew Enthusiast

05silvycrew

Posted
Posted

I have a 2005 Silverado crew cab z71 with about 67,000 miles on it, 5.3L, 4.10 gears.

 

Last night after coming off the freeway from a 2 hour drive I was idleing down to the stop light on the off-ramp. Without me touching the brakes, the truck started slowing down as if the brakes were being applied.

 

When i got to the stoplight I rolled down my window to listen at take-off. I let off the brakes and my truck didn't even idle forward under its own power, when I gave it gas something chirped and I could still feel resistance when accelerating.

 

While rolling to a stop at the next light (with my window still down) I could hear some kind of grinding/resonance that was directly proportional to my speed. The more I slowed down, the more it slowed down. Again almost bringing me to a stop by itself.

 

I had the brakes inspected about a month ago and the rotors where turned but the pads where good in front, the drums where good in the rear. I don't think it's my brakes dragging. Does anyone have any leads as to what might be causing my drag? I'm kind of concerned because I'm making that same 2 hour drive back home tomorrow (Sunday) morning and I don't want to burn something up.

 

Thank You In Advance

Sincerely:

Ben

gmtech4 Senior Enthusiast

gmtech4

Posted
Posted

well it seems strange so this is not the place for help,please take it to your mechanic for a diagnosis and not the "this happened to me " reply

dietz4ibanez Senior Enthusiast

dietz4ibanez

Posted
Posted
I have a 2005 Silverado crew cab z71 with about 67,000 miles on it, 5.3L, 4.10 gears.

 

Last night after coming off the freeway from a 2 hour drive I was idleing down to the stop light on the off-ramp. Without me touching the brakes, the truck started slowing down as if the brakes were being applied.

 

When i got to the stoplight I rolled down my window to listen at take-off. I let off the brakes and my truck didn't even idle forward under its own power, when I gave it gas something chirped and I could still feel resistance when accelerating.

 

While rolling to a stop at the next light (with my window still down) I could hear some kind of grinding/resonance that was directly proportional to my speed. The more I slowed down, the more it slowed down. Again almost bringing me to a stop by itself.

 

I had the brakes inspected about a month ago and the rotors where turned but the pads where good in front, the drums where good in the rear. I don't think it's my brakes dragging. Does anyone have any leads as to what might be causing my drag? I'm kind of concerned because I'm making that same 2 hour drive back home tomorrow (Sunday) morning and I don't want to burn something up.

 

Thank You In Advance

Sincerely:

Ben

 

 

Did it sound like the noise was from the rear differential? You not in 4hi are you? Cause I know that when you are in 4hi it seems like there is more resistance than opposing to 2wd.

Ranger Senior Enthusiast

Ranger

Posted
Posted

A remote possibility, but it may be your fan clutch...The same thing is happening with my buddy's truck and the bearings are starting to crap out...Same symptoms as yours.

  • 2 weeks later...
05silvycrew Enthusiast

05silvycrew

Posted
  • Author
Posted

just to catch you up on this, mystery solved....

 

took the truck to the dealer twice to have them diagnose the problem. they couldn't find anything wrong. said they couldn't even hear it. I could still distinctly hear the metal on metal sound. I narrowed it down to the rear half of the truck...and focused in on the driver side tire. with enough rolling around parking lots and checking things, i came to the conclusion that i either had a dragging brake or something wedged in the drum.

 

the later was true. One of the brackets that holds something (shoe?) cracked and broke off in the drum, thus my metal on metal grinding. Couple new parts from Midas and I'm back on the road, grinding free! :crackup:

 

Thank you to all those that tried to help, it was much appretiated. Does anyone know of a TSB or if this is a common occurence. or was i just "lucky"

lol

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