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It's just that when I have to put fluid in the transmission I have to drain the same amount out of my transfer case. It's in a 97 GMC Sonoma. 4 wheel drive 4.3 Vortec engine,automatic transmission.
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If it won't go into gear, sounds like you've run out of transmission fluid. That grinding sound when you turn the shaft by hand, sounds like you've run it for a bit too long without fluid and wore the gears down. Start it up and check the trans fluid with dipstick. If none on stick, put some in it. You may have already ruined the transmission though. But you never know. Try putting fluid in. Might work.(for a while)
If you have manually locking front hubs, you probably have a bit of binding in the drive train due to the front wheels being locked to the drive system
After unlocking the hubs, back up about 20 feet, then back forward about 20 feet.....see then if the transfer case can then be disengaged. You MAY need to just yank on the transfer case shifter while the vehicle is moving (slowly of course).....
I had an older ford pickup which did the same thing.....disengaging the hubs and just yanking the shifter had disengaged the 4 wheel drive then I was able to put it back into 2wh high.
Hello RD. Yes, Inside your transfer case there is a clutch that is made up of several plates that are designed to slip when there is a difference in torque between the front and rear. If improper type of fluid was put in or if the fluid levels were allowed to get low it may have caused damage. If indeed that improper fluid was put in, drain and refill with the proper fluid.
NVG 136-NP4 (1-Speed Automatic)
Auto-Trac II Fluid GM P/N 12378508
NVG 233-NP1 (2-Speed Selectable)
Dexron III GM P/N 12346143
NVG 236/246-NP8 (2-Speed Automatic)
Auto-Trac II Fluid GM P/N 12378508
On the passenger side of the transmission, there is a fill plug and a drain plug. The fill will be the upper plug and it's the one you use to check to make sure you have the right amount of transmission fluid in your transmission.
Manual Transmission, NV3500..........2 litersManual Transmission, NV1500..........2.7 liters
Undo the plug with a wrench and if the transmission trickles out, your good to go. If there is no fluid trickling out, top it off and place the plug back in and tighten to (Manual Transmission NV1500 Fill Plug 17 ft/lbs) or (Manual Transmission NV3500 Fill Plug 44 ft/lbs) Thank you for using fixya and be safe. Drain Plug 44 ft/lbs Drain Plug 27 ft/lbs
has your transmission oil been low? only reason i ask that is you said it acted like it was pressurized i have seen the rear seal on the trans go out and overfill the transfer case before. you never want to fill it over the fill hole. so if it held just over a quart that is what it takes. but there is still the question as to where the other fluid came from my guess would be watch for the trans fluid to be low.
If it has auto 4x4. which will have 4 push buttons on the dash it will take auto trac fluid that you will need to get at your local GM dealer. A regular transfer case will take Automatic transmission fluid.
Usually when a truck gets stuck in 4 low you need to put it in reverse, start backing up very slowly, put it in neutral (or push in the clutch on manual trans models) and stop the truck with the brakes. this will release the load on the gearing which should allow you to shift out of 4 low.
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