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By Ian Mills
My 4l60e is starting to show its age a bit. Not ready to condemn it yet but it occurred to me that it would not be too difficult (on the scale of trans swaps) to put a NV4500 from a GMT-800 HD truck in place of my 4l60e.
I've done a bunch of research on which part numbers I would need and it seems mostly manageable but I have run across something I can't find the answer to online.
My NP246 transfer case has the 27 spline input shaft because it's currently hooked up to a 4l60e. The NV4500 has a 32 spline output and was never (as far as I can tell) offered with a NP246, just the NP261 it seems like. However there's a part number for a 32 spline input shaft for a NP246. If I install that input shaft, will I be able to put my NP246 behind a NV4500?
I have a 2017 Chevy Silverado 4x4 5.3l V8 with the 8 speed transmission. I already flushed out my transmission and filled it back up with the Mobil 1™ Synthetic LV ATF HP blue label. The question is, do i also use the HP fluid for my transfer case? Or do i need to use just a standard ATF fluid instead. I cant seem to find a straight answer on this. The owners manual states to use DEXRON®-VI Automatic Transmission Fluid. Would using regular ATF in the transfer case and HP ATF in the transmission cause any issues? Thanks in advance!
Trying to pull the front driveshaft on my '07 Sierra 1500 (new style). Front of shaft is free (out of front diff) but at the back end there is a pressed u-joint (no bolts) with a short rubber boot clamped over the spindle end and it is not sliding out of the transfer case as easily as other driveshafts I've pulled in the past. Dont want to force it if the boot is what's holding it back. Do not see any videos or explanatary photos online showing how the DS removes from the transfer case. Anyone help? See photo. Much thanks...
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?
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