Jump to content

Encoder motor or transfer case issue

chris.ncfb

Recommended Posts

chris.ncfb New Member

chris.ncfb

Posted
Posted

Got off the beach a month ago in my 2006 GMC Sierra, hit the interstate for a 100 mile trip back home. 3 times it felt like it hit a dip in the road with what seemed to be a second of lost power each time. I noticed my rear view mirror electronics cycling on and off most of the ride back. It was snowing that morning so maybe the ice had something to do with that. When I got off the interstate and hit the 2 lane road I lost power to the rear wheels and you could hear a rattle underneath. As the truck slowed to about 35 it started pulling again. When I started to back in my driveway it would not go in reverse and again I heard the rattle. It had a grinding noise when I put it in park and then it was quiet. I put in 4 hi and backed in my driveway. I did not drive it for a few days and then it was great for a month in 2wd. Last weekend I tried to put it in 4lo and it would just rattle, would not engage. 4hi worked fine. I put back in 2wd and About a mile down the road it started the rattle again and loss of power to rear wheels. I kept messing with the 4hi and 2hi until it went back in 2wd and stayed in gear. I haven't had any more issues because i havent tried engaging in 4 hi or lo. I would like to trust my 4wd again. I hope someone has had a similar problem they can advise me on. One more thing to add, my Service 4wd light has come on briefly about 3 times in the last 3 years. I'm hoping it is just the actuator and not the pump issue in the transfer case I hear so much about.

 

Sent from my SM-G900V using Tapatalk

  • 1 month later...
T-Town-Z Enthusiast

T-Town-Z

Posted
Posted

On our '05 Silverado, I replaced the encoder motor (GM part) about 5 times before finally buying an aftermarket "lifetime replacement" unit from O'Reilly's. These trucks also have an issue with the ground wire connection for it corroding and causing intermittent problems. It's been a while since I messed with it, but the ground wire is attached to the frame below the drivers door. Try that first for an easy "no cost" fix. If that doesn't get it, then you may need to replace the encoder motor.

You might do a search for it or look on you-tube for some videos of where exactly to look.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • GAMark
      Road Master Active Suspension

      By GAMark · Posted

      Not true! I have been runing them since 2006 F250! suspension component that works as a sway bar, a traction bar, and a helper spring points directly to the RoadActive Suspension (RAS) kit. Works as a sway bar, a traction bar, and a helper spring.
    • Grumpy Bear
      OCI, not when but why?

      By Grumpy Bear · Posted

      Here's a starter kit:    CC Jensen, a Danish oil testing Concern gives us the following guidelines:   ISO 14/12/10 Very Clean Oil ISO 16/14/11 Clean Oil ISO 17/15/12 Lightly Contaminated ISO 19/17/14 New Oil ISO 22/20/17 Very Contaminated and not suitable for any service.   In addition CC Jensen gives a table showing how engine life is increased by cleaning up the oil. For example cleaning the oil from 19/17/14 to 13/11/8 will extend motor life by a factor of 6X.   But even cleaning it two “Life Extension Classes” will double motor life. So perhaps giving those classes would be useful:   21/19/16 20/18/15 19/17/14 18/16/13 17/15/12 16/14/11 15/13/10 14/12/9 13/11/8   *************************************   https://testoil.com/program-management/setting-iso-cleanliness-targets/   Third paragraph from the bottom will give a starting point.    Your next question should be, okay 10um at what Beta ratio and the answer is in the graph Beta 75.   Then the next question is what is your chosen filters profile? (Purolator PL series below) The red dot is Beta 75. This was the information I obtained from MANN a few years ago. So the best filters, Purolator One, AMSOIL EA, FRAM Ultra, Royal Purple, Bosch Premium should get a doubling engine life over filters like Purolator L, any service filter from any quick lube, WIX, NAPA, STP, Mobil 1, Purolator BOSS.    And as noted by CC Jensen a 2-5 micron @ Beta 200 bypass system has the capability of a six fold improvement. AMSOIL has such a system as does Donaldson.       Now having said all that testing is the touchstone. Test the oil NEW and test it with your chosen filter. Then test over milage. Do the work, get the result. But understand this in NOT absolute BECAUSE this is one factor in isolation.   Example:    A valve spring supplier can state that with cam X and a valve train of Y grams the valves will not float to 7K rpm. is that true if the builder choose a system 20 grams over limit? Common sense must be used and limits understood. 
    • bruceb58
      Road Master Active Suspension

      By bruceb58 · Posted

      This doesn't look like a GM truck. Not needed on a HD truck
    • CamGTP
      Gas Prices

      By CamGTP · Posted

      It varies a ton around me. Some places are still at $5.00 or higher and others are way down into the $4's.   Offroad diesel was $4.02 at the one station I passed today.
    • Hdwrguy
      2027 Chevrolet Silverado: Official Discussion

      By Hdwrguy · Posted

      So after reading the reveal from Chevrolet, I kept asking myself...why did the trim levels change?   Here are the official ones:   Work Truck (WT): The quintessential fleet truck, built with durable, easy-to-clean interiors for commercial or utilitarian use. Custom: A stylish, road-oriented trim that adds a more refined appearance, standard dual exhaust, and modern exterior styling. Custom Trail Boss: An entry-level off-roader featuring a 2-inch factory suspension lift and 34-inch mud-terrain tires on a budget. Silverado: Serving as the new base consumer truck (replacing the previous LT trim), it comes standard with the Z71 off-road package when equipped with 4WD. Trail Boss: Steps up the off-road hardware with the 2-inch lift, 34-inch tires, monotube shocks, an exclusive off-road hood, and more premium interior options. ZR2: The flagship off-roader. It boasts 35-inch mud-terrain tires, Multimatic DSSV dampers, front and rear electronic lockers, forged carbon-fiber interior accents, and an available hardcore Bison Edition (co-developed with AEV). High Country: The pinnacle of luxury. It replaces bright chrome with modern satin chrome, 22-inch wheels, premium leather, real wood interior trim, a panoramic sunroof, and an exclusive front-passenger touchscreen. As others have stated, why would you want a Silverado - 'Silverado' - wth?? LT needs to remain!!!   Also, there will no longer be a dedicated Z71 model.  All 4x4 trucks will have the Z71 package. Carplay is also something that cannot be removed.  Hopefully it will remain.     I am excited about the 5.7L V8 (350 C.I.D.)  Old school Chevy power.  My only concern is whatever version of AFM/DFM cylinder deactivation.  Too bad that isn't an option a buyer can choose to have or not.   I will definitely be stopping by my local dealership when these trucks start showing up.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...