on the rear of the case there is a fluid fill line next to the fill bolt.
Remove fill bolt and stick your finger in.
quickly!
No
The 1974 model 203 transfer case has a fluid capacity of 5.5 quarts. You can check the fluid level from the same hole that you fill the transfer case.
You will see 2 plugs on transfer case, the lower is to drain, upper is to fill or check level
The fill plug is on the left side of the transfer case. You remove the fill plug, and the fluid should come to the bottom of the fill plug.
Some people have reported a clicking noise in the transfer case when it's low on fluid, so check the level. If the level is fine, use a screen to drain the fluid through and watch for metal flakes. If you find them, the transfer case would need to be rebuilt.
Remove the fill plug on the transfer case and see if fluid is up to the edge of the plug!
On the back of the case there are two plugs that take a 10mm Allen wrench to remove. The top of the two is the fill plug, fluid should be level with the bottom of the hole.
The transfer case fluid on a 1985 Chevy Suburban should come to the bottom of the filler hose. It must be on a level surface to accurate measure fluid levels.
The transfer case is behind the transmission and your front and back driveshafts are connected to the transfer case. To check the fluid level the vehicle must be level ( on a hoist is nice) Clean the filler plug - the upper most plug on the rear of the transfer case. Use a 3/8 ratchet turning counter clockwise to remove the filler plug Fluid should be up to the bottom of the filler plug hole, if not add the recommended fluid until it is reinstall the filler plug making sure it is fully seated check for leaks
There should be a plug on the side of the transfer case about half way up the side. Take the plug out. If oil comes out... it's full!
The fluid level ( MERCON ATF ) should be at the bottom of the FILL hole when you pull the FILLER plug on your transfer case