GMC Troubleshooting Questions? Ask a Mechanic for Answers
when the transfer case was replaced was the encoder motor actuator re used from the old original case ?
ok thank you for that information
i agree it is very odd that 2 cases would do the same thing
will it do this if you drive it in 4HI ?
can they duplicate this issue with the truck up in the air ?
i would first see if it will do this in 4HI
if it does NOT do this in 4HI then the odds are it is in the transfer case but we have had some transmissions cause this type of noise and issue
the best bet will be see if it will do this in 4HI or not and also see if you can duplicate the noise
since either way the transfer case has to come out with the issue being a case or the transmission have the case removed and the back 1/2 removed for inspection if NOTHING is found then the transmission is the issue with a possible planetary gear set issue
those sprags are tough to nail down usually when you get the grinding its in the transfer case or something in the planetary gear set
its just going to have to come down to old school with this issue of pull the case and inspect it and if the inside of the case looks good go after the transmission taking it out and apart
no that should not be the issue since it was driven with the encoder motor unplugged this issue comes down to a hard internal issue in the case or transmission
yes that is true but since it still did this with another case and another encoder motor and with the encoder motor unplugged it is a physical issue in the case or the transmission
they are on the right track that the case needs to come out and the back 1/2 removed to inspect it next
these issues come down to the direction of removing and visually inspecting next
there is no 100 % it is this or its that with these type of noises but its one of the 2 and things need to start get eliminated next or they will do nothing at all for you keep guessing and throwing parts at it
the rare chance of 2 cases doing the same thing would lean us more so to an internal transmission issue causing this noise and issue
then pull the case and take the 1/2 off the back and inspect it next
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but if they ran it up in the air and 100 % the noise was from the case and it did this noise with the encoder motor unplugged it would have to be in the case i agree
how are you making out ?
Okay sounds good let me know
great to hear they found it
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