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I’ve searched previous forums and haven’t found the feedback I’m looking for, although this is a common topic. So bear with me.
I have a 1999 Silverado 1500... 5.3L.... 4l60e... 4WD... NP246 TC.... 3.73 gear ratio... 160k miles. The symptoms I’m having are namely: Large clunk when shifting into reverse. A less noticeable, but still at times, a clunk when shifting into Drive. Harsh down shifts when coming to a stop from cruising speeds.
Today, I put the truck on 4 jack stands so I could get a better idea of what is going on. After being under the truck during shifts between Park Drive and Reverse , it seems to me the “clanking” is originating from the Transfer Case. And mainly from the output shaft that drives the front diff. When the truck is turned off and in park, I can manually with my hands rotate the front drive shaft back and forth and replicate the same (ish) banging noise I hear when making those shifts between P D and R. The noise is consistent whether the truck is in 2WD, 4 HI, or 4LO.
I guess my question in general is what testing can I do to further look into this and figure out the root cause? Would these symptoms typically originate from the tcase?
My long term plan is hopefully to replace both the Transfer case and front diff with either low mile junk yard OR remanufactured units.
after replacing those things, assuming a good install, do you believe the “clanking” will be fixed? In general, the truck is shifting through gears like dog ******. But I love her and want to renew it over time.
My 2015 Sierra transfer case just disintegrated at 48,000 miles. This truck has been serviced by a GM garage on schedule since purchase. The dealer discovered that the case was dry and reported that there were no holes or seal/gasket leaks to explain the loss of fluid. Speculation was that someone pulled the plug on the transfer case during a routine oil change (at another dealer) and failed to replace the transfer case fluid. The transfer case went out 4 months and 3000 miles from the time of this oil change. I'm stuck with a $2500. bill as GM has denied warranty coverage. Is it possible for a transfer case to go 3000 miles and 4 months of use without oil and are there any other explanations for this major/expensive problem?
By Brizzo Jenkins
So the Chevrolet owners manual says to not tow a 4 x 4 vehicle with a single speed transfer case with “any“ wheels on the ground. It says to use a flatbed tow truck only. I will always do what Chevy says, as to not void my warranty. But, I can’t conceptually understand in my brain why I can’t tow my truck in 2-wheel drive with the rear wheels lifted off the ground and the front wheels on the pavement rolling. As long as my four-wheel-drive is not engaged, why would my front wheels do any damage to the vehicle? From my understanding, when the vehicle is in 2 Wheel Dr., the front differential is disconnected from the transfer case and front drive train. Why would this cause damage?
inversely, couldn’t I disconnect the rear drive shaft and tow it with the rear wheels only on the ground?
just seems weird that Chevy says “no“ to absolutely any options with towing with wheels on the ground. I mean, how the hell do they expect me to get it on a flatbed tow truck without “pulling it with wheels on the ground”. Just a thought. Maybe someone with more knowledge of the Single speed transfer case linkage/ 4-wheel drive system can advise.
So I had my transmission replaced a few months back, everything was good until I tried to put it into 4H the other day. I hadn't used 4x since I had the work done, so I didn't notice, but the shift lever doesn't line up with the correct gear. Shifts fine between 4L, N, and 2H. Just shows the wrong gear on the shifter shroud on the floor. It would shift into 4H bit the lever is too far back and won't allow it to go into 4H. Is this just the linkage needing adjustment or is there something more? The transmission mount was old and worn, so I changed it out with no difference.
I have a weird problem with my transfer case wiring apparently. I couldn't get my transfer case motor back on and I had no lights on at the selector buttons. So i took my fuse panel apart and flipped it over and was looking at the underneath. Didn't really see anything wrong and left it flipped up. I turned the key on with the t-case motor plugged in and heard it working. So I got under and the motor went right on without any problem at all. So I thought ah ha got it and put it all back together. Guess what now my lights are off again and nothing works again and both fuses are good SOOOOOO?. What the heck do I do now other than drag it out into the yard and torch it because this has been a nightmare of a problem from the start. Everything has been replaced because this said it was that and so on. I am truly ready to burn this P.O.S. HELP. 2000 Chevy Silverado.
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