Transfer case /old faithful - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TWOKEELYA · 06-27-2005, 10:22 AM

My 2.5 year old son and I took the 68 for a ride to the scale so I can get it regestered, 4800 lbs. On the wy back, smoke filled the cab, I pulled over and couldn't believe my eyes. The transfer case had blown all the gear oil straight up and it was pouring down from the crossmember and everything under was covered. What would cause this? could this just be a seal or Am I in deep.

Richard

chevyfarmer · 06-27-2005, 10:38 AM

Is it coming out the breather on the top of the t case? Is is a auto or manual tranny? I had a 72 4x4 blazer that did the same thing, the seal between the tranny and t case was wasted so it filled the t case with tranny fluid.

TWOKEELYA · 06-27-2005, 11:45 AM

It is a auto, the trans fluid level is ok, and the fluid is black gear oil.

*wolfthing2000* · 06-27-2005, 12:03 PM

Is this the Rockwell transfercase????

bouncytruck · 06-27-2005, 12:07 PM

Is it a rockwell T221? Was the case hot when it happened? I'd guess it is time for some new seals. While you have it open, you can see if it has any debris in the case.

TWOKEELYA · 06-27-2005, 12:13 PM

I'm Not Sure, I'll Check Tonight. Would Driving It In 4 Wheel At High Speed Cause This?

Ray_71Chev_in_PA · 06-27-2005, 12:58 PM

Richard,

You had the truck in 4WD on the pavement?

Ray

TWOKEELYA · 06-27-2005, 01:10 PM

Quote:

Originally Posted by Ray_71Chev_in_PA

Richard,

You had the truck in 4WD on the pavement?

Ray

No, but I wonder if the P.O. or the transport company had put it in 4 to load, and when they unloaded and drove it here in 4wd. This was my first long drive when it erupted, the only other time I've driven it is around the block.

Ray_71Chev_in_PA · 06-27-2005, 01:15 PM

Richard,

I'd be concerned as well. You'd know right away if it was in 4WD while you were driving it. As for previous drivers, no telling. I read your post because I have an Early Bronco than smokes from oil from the transmission/transfer case area as well. It'll get your attention!

Ray

TWOKEELYA · 06-27-2005, 01:30 PM

Ray,

This thing just blew like a geyser, everything out. I could see under the tunnel where the shifter is that it had blown upward. May even be out of the shifter hole, I can’t tell yet. Also, when I was stopped along the roadside, it was pouring off the cross member and drenching the ground, big puddles! I never knew there could be so much oil in the transfer case. How much do they hold anyway?

Ray_71Chev_in_PA · 06-27-2005, 02:31 PM

Richard,

Not sure how much it holds. My truck is 2WD! The manual I have says "...add oil as required" which means it has a fill hole. You add lube until it won't take anymore.

Ray

1969 GMC · 06-28-2005, 11:56 AM

If the truck is an auto, which has been swapped in from a later model, I am willing to bet it also has a newer t-case (NP205 most likely).

tedfrk · 06-28-2005, 10:09 PM

if it is an np 203 use sae 10 w 30 or 10 w 40 motor oil the last time i had it changed they were going to use gear oil i am just glad i was there

06-27-2005, 10:22 AM	#1
TWOKEELYA Registered User Join Date: May 2005 Location: Santa Cruz, California Posts: 54	Transfer case /old faithful My 2.5 year old son and I took the 68 for a ride to the scale so I can get it regestered, 4800 lbs. On the wy back, smoke filled the cab, I pulled over and couldn't believe my eyes. The transfer case had blown all the gear oil straight up and it was pouring down from the crossmember and everything under was covered. What would cause this? could this just be a seal or Am I in deep. Richard __________________ Not all who wander are lost

06-27-2005, 10:38 AM	#2
chevyfarmer Registered User Join Date: Feb 2005 Location: Owosso, Mi Posts: 242	Is it coming out the breather on the top of the t case? Is is a auto or manual tranny? I had a 72 4x4 blazer that did the same thing, the seal between the tranny and t case was wasted so it filled the t case with tranny fluid. __________________ 67 short wide 355ci 3 on tree 69 short wide 250ci 3 on tree 68 long wide 283 3 on tree 72 2wd Blazer project 454 5 speed

06-27-2005, 11:45 AM	#3
TWOKEELYA Registered User Join Date: May 2005 Location: Santa Cruz, California Posts: 54	It is a auto, the trans fluid level is ok, and the fluid is black gear oil. __________________ Not all who wander are lost

06-27-2005, 12:07 PM	#5
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,049	Is it a rockwell T221? Was the case hot when it happened? I'd guess it is time for some new seals. While you have it open, you can see if it has any debris in the case. __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L

06-27-2005, 12:13 PM	#6
TWOKEELYA Registered User Join Date: May 2005 Location: Santa Cruz, California Posts: 54	I'm Not Sure, I'll Check Tonight. Would Driving It In 4 Wheel At High Speed Cause This? __________________ Not all who wander are lost

06-27-2005, 12:03 PM	#4
wolfthing2000 Account Suspended Join Date: Oct 2004 Posts: 1,276	Is this the Rockwell transfercase????

06-27-2005, 12:58 PM	#7
Ray_71Chev_in_PA Registered User Join Date: Apr 2005 Location: Boyertown, PA Posts: 36	Richard, You had the truck in 4WD on the pavement? Ray __________________ ~~~~~~~~~~~~~~~~~~~~~~~~~~ 1971 C10/350/Blue/White/Blue in Boyertown, PA

06-27-2005, 01:15 PM	#9
Ray_71Chev_in_PA Registered User Join Date: Apr 2005 Location: Boyertown, PA Posts: 36	Richard, I'd be concerned as well. You'd know right away if it was in 4WD while you were driving it. As for previous drivers, no telling. I read your post because I have an Early Bronco than smokes from oil from the transmission/transfer case area as well. It'll get your attention! Ray __________________ ~~~~~~~~~~~~~~~~~~~~~~~~~~ 1971 C10/350/Blue/White/Blue in Boyertown, PA

06-27-2005, 01:30 PM	#10
TWOKEELYA Registered User Join Date: May 2005 Location: Santa Cruz, California Posts: 54	Ray, This thing just blew like a geyser, everything out. I could see under the tunnel where the shifter is that it had blown upward. May even be out of the shifter hole, I can’t tell yet. Also, when I was stopped along the roadside, it was pouring off the cross member and drenching the ground, big puddles! I never knew there could be so much oil in the transfer case. How much do they hold anyway? __________________ Not all who wander are lost

06-27-2005, 02:31 PM	#11
Ray_71Chev_in_PA Registered User Join Date: Apr 2005 Location: Boyertown, PA Posts: 36	Richard, Not sure how much it holds. My truck is 2WD! The manual I have says "...add oil as required" which means it has a fill hole. You add lube until it won't take anymore. Ray __________________ ~~~~~~~~~~~~~~~~~~~~~~~~~~ 1971 C10/350/Blue/White/Blue in Boyertown, PA

06-28-2005, 11:56 AM	#12
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	If the truck is an auto, which has been swapped in from a later model, I am willing to bet it also has a newer t-case (NP205 most likely). __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

06-28-2005, 10:09 PM	#13
tedfrk Registered User Join Date: Feb 2005 Location: forked river nj Posts: 147	if it is an np 203 use sae 10 w 30 or 10 w 40 motor oil the last time i had it changed they were going to use gear oil i am just glad i was there



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