Transfer case fluid for 99 suburban

Too thick of fluid will not circulate and will burn up your transfer case. you definitly need to use the manufacturer recommended fluid.

Question edited for clarity, full year make model.
Question moved to category.

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1. Be sure to run your car (in 4WD) for about 5-10 minutes or so to warm the oil up and be sure to park on a level ground.First we need to gather our materials. This is what I used for my oil change:Initial expenses

• Oil Catcher - $10 at Pep Boys
• Fluid Pump - $5 at Pep Boys
• 24mm wrench or ratchet (assumed ownership)
• 12mm? and 14mm? sockets to remove skidplate

Transfer Case Change Expenses

• 3 Qt 75W90 Gear Oil - $21
• (I used Redline from myoilshop.com)

2. Locate the Transfer Case.
Remove the Fill Hole plug first, then place your oil catcher in position, and remove the drain hole plug.
While the oil drains, clean off the drain plug.

3. When finished draining, replace the drain plug, and proceed to pump the fluid into the fill hole.
I filled until the fluid overran, but you can check the fluid by sticking a pinky into the hold and checking the level.
Replace the fill hole plug, and done.

First I would check your fluid level. There are 2 plugs located on the rear of the transfer case. Remove the top one and verify fluid level. To repair the leak the transfer case will need to be removed and reinstalled with a new gasket.

Verify fluid level first, add if needed and verify that sound goes away. If sound fails to go away you will need to have the transfer case replaced or rebuilt. I think the fluid is Dextron III ATF. Double check with another source before adding fluid.

i have a 1999 chevy suburban it drives forward just fine **** no reverse

NO! This is a Ploy to Screw you for Cash! They should not need attention at all until 100,000 Miles unless something goes Wrong.

75/90

CHANGED FLUID IN TRANSFER CASE AND FRONT DIFFERENTAIL!!!! Don't burn it up, Add syncromesh fluid to each unless atf is used

Change the fluid in the transfer case and retest, I recommend you use synthetic fluid, cost more works great and last nearly the life of the vehicle.

Start by inspecting your tires. Look for uneven tread ware, tire separation (a bubble) on the inside or outside. Then change the fluid in your front and rear differential. This will tell you if you have a gear problem. Change the fluid in your transfer case also for indication of a gear problem.