where do you add - i've got a 99 silverado and can't find where you would put or check the fluid.it kind of makes a groaning whirley noise on left ...

mike28honda · by **mike28honda** [OP] » Feb 23 2011, 3:16am

i've got a 99 silverado and can't find where you would put or check the fluid.it kind of makes a groaning whirley noise on left side.gets worse when driven for a short while.i've noticed a very slow drip where the front drive shaft goes into the case.it also seams like it doesn't fully disengage out of 4x4 unless i go to L4 then 2wd.thanks for any help.

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Levman74 · by **Levman74** » Feb 23 2011, 1:30pm

Not sure of the mechanical issues, but the fill plug should be located on the top, but not 100%, alldata wasn't very specific, but do look into the fluid, and replacing the seal, it should help both issues

lzn197 · by **lzn197** » Feb 23 2011, 4:38pm

Transfer case is toast. Adding fluid to a component that is already making noise is ok but I think some damage is already done.

chevellemark · by **chevellemark** » Feb 23 2011, 4:57pm

Mine won't go to 4WL or 2WHI. Maby mine has the same problem. I'll have to check mine as well. They shouldn't make the fluids that hard to check.

I have no idea where the check or fill is on mine as well, but i'll find out.

chevellemark · by **chevellemark** » Feb 23 2011, 5:07pm

I haven't looked at mine yet, but there should be a plug that screws in to the side of the case at the fluid level somewhere. You just take out the plug and fill intil fluid comes out and that will be the fill level.

mike28honda · by **mike28honda** [OP] » Feb 23 2011, 11:15pm

ok i'll look again.thanks guys.

gmctruckguy · by **gmctruckguy** » Feb 24 2011, 5:14am

There are 2 plugs on the back side, 18mm head (3/4"), one about half way up and one low on the bottom. pull the one thats in the center and add fluid into it until fluid starts to come out. reinstall plug. Chances are if its noisy you got a bearing gone, to little to late

dshanks · by **dshanks** » Jun 05 2011, 5:06pm

Ck guy said back of tcase you'll see 2 plugs bottoms drain tops add plug ate you get this drown howl in 2wd? I had a similiar problem but it's was only when in 4x4 turned outthat I streched the chain and it was tubing the tail section inside the tcase, I would get under there and check it out before you have to replace the hole thing and it's not cheap what tcase you have 261np2 manual?

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where do you add - i've got a 99 silverado and can't find where you would put or check the fluid.it kind of makes a groaning whirley noise on left ...

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