73-87chevytrucks.com

73-87 Chevy _ GMC Trucks => 4 Wheel Drives => Topic started by: Java110 on May 27, 2002, 04:00:00 pm

Title: This is a stupid question but...
Post by: Java110 on May 27, 2002, 04:00:00 pm

I need to make sure. What weight oil do I put in the T-case, and front and rear diffs? I'd say 90 front and rear, but i'm not sure about the T-case. Any help is appreciated... Thanx

Java110@email.com

Title: Re: This is a stupid question but...
Post by: Kevin108 on May 27, 2002, 05:58:00 pm

The diffs call for 80w90 and the xfer case calls for Dexron ATF.

87 Silverado 4x4 Longbed Pickup
My Mods | Truck Pics | E-mail Me

Title: thanx
Post by: Java110 on May 27, 2002, 11:24:00 pm

just got all the fluid changed. Well, I got the "milk" changed. lol.

Title: Re: thanx
Post by: 73K20 on May 28, 2002, 12:22:00 pm

Hold up a second.  It depend on what transfer case he has.  The NP205 and NP203 take 80w90 and im not sure about the NP208.  Did it smell like differetial fluid (distinctive smell) when you took it out.  Give us some info about you truck so that we can make a proper decision.

1973 K20 - 350/350/205

Title: re: thanxs
Post by: stroked79 on May 28, 2002, 01:35:00 pm

the 205 does take 80w90 but, the 203 runs on 10w40, because it is a full time case if you use the 90w stuff the t-case will not oil properly and will wear out alot quicker.  i did the same thing till i read an article about mile markers part time convertion kit.

Title: Dextron III
Post by: java110 on May 28, 2002, 01:40:00 pm

I could smell that it was tranny fluid when I drained it. Autozone it takes Dextron III.

Java110@email.com

Title: Re: Dextron III
Post by: Kevin108 on May 29, 2002, 07:26:00 am

I've heard that even on the part time cases that call for Dexron, if they whine too much you can put 10w30 in them.  Any confirmations on that?

87 Silverado 4x4 Longbed Pickup
My Mods | Truck Pics | E-mail Me

Title: re: dextron III
Post by: stroked79 on May 30, 2002, 07:06:00 pm

I,ve never heard of running the dextron in them but mne drops into gear alot better since i put the 10w40 in, but i have noticed a rattle that i didn't have before.  any ideas?

Title: Re: re: dextron III
Post by: VileZambonie on May 30, 2002, 10:48:00 pm

Only run Dexron in the 208.

~Captain's Log~

Title: you wouldn't be the first to get it wrong
Post by: tigercity on May 31, 2002, 03:01:00 am

I saw a nv 241 that had gear oil in it.  The hydrolic force of the heavy oil cracked the case.  I believe that all the aluminum cases use dexron

Title: Dexron
Post by: 83 CHEVY K10 on June 05, 2002, 05:43:00 pm

Yes Yes Yes Dexron II (III) ATF goes in NP208 transfer cases.

Mike