Help with tfer case...can someone - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Blizz · 07-16-2006, 09:43 PM

maybe clue me in to where my transfer case MIGHT be leaking from? I know you can't tell much from this picture but it would be better than my guess. You guys are the experts around here. If it's just a gasket...where can I get the gaskets or seals for this thing? I'm a computer guy so any help that yall can give me or if someone could point me in the right direction, I'd really appreciate it. Thanks.

**jamie72** · 07-16-2006, 11:17 PM

my first place to check fro mthe pic is where your speedo cable screws in the the ratio box on the side of the case looks like you cable might be pulling on it a little and that could cause a leak.
i would wipe it down good then drive it a little the check it again.
good luck
jamie

RunTMCfan · 07-16-2006, 11:43 PM

You really shouldn't have any leaks of Gear Oil above the fill bolt. If you are experiencing leaks that high up I would guess that you have ATF in there from your tranny. A brand new set of Tcase gaskets will succomb to an overfilling of ATF. Those seals at the top aren't really meant to have fluid against them at all times.

You may have to pull out your tcase and redo that big O ring from the tranny to the Tcase. Since you have the Tcase out I would have it resealed as well. You can do it on your own but you have to pull the gears apart.

Blizz · 07-17-2006, 08:36 AM

Quote:

Originally Posted by jamie72

my first place to check fro mthe pic is where your speedo cable screws in the the ratio box on the side of the case looks like you cable might be pulling on it a little and that could cause a leak.
i would wipe it down good then drive it a little the check it again.
good luck
jamie

You're talking about the upper left corner where that little gray box is? The truck was lifted so maybe that's causing a strain on the speedo cable? I know the speedo doesn't work. Ok that's a good place to start I guess. Thanks a bunch.

ClassicStyle · 07-18-2006, 11:40 AM

Clean it all off, and see where a fresh leak starts from. Its hard to tell after they've been driven a lot becuase the fluid gets thrown everywhere.

Its probally leakin from the snout of the transfercase, my 82' started there right before i sold it.

-Cameron

also check if your tranny is leaking, its entirely possible its throwing fluid back onto the transfercase. I had my father's dealership do a oil change on my truck and they dropped the oil filter, which cause it to leak, by the time i got home and realized it was leaking i had oil covering the entire undercarrage, from enigine to rear driveshaft.

Blizz · 07-18-2006, 02:28 PM

If it is leaking from there, what kind of repair would I need to do? Are we talking gaskets and seals here or something worse?

Scrubby · 07-19-2006, 02:51 PM

Unless the case is cracked, to fix any leak you are looking at gaskets and seals. I got my rebuilt kit from Transmission Exchange (http://www.txchange.com/).

Pete

**kwmech** · 07-20-2006, 01:16 AM

Looks like he is full of atf, look at the color of the oil dripping off the speedo parts. Pull the FILLER plug out and see what happens. May have to pull the case to install new seals in between the 2 units. At that point I would reseal the whole t-case myself.

Blizz · 07-20-2006, 11:32 PM

excellent advice yall. thanks a bunch. how do i find out what tranny i have?

krue · 07-21-2006, 12:09 AM

http://67-72chevytrucks.com/vboard/s...d.php?t=118528

This might help.

IGOR · 07-21-2006, 10:40 AM

Looks like a T350 to me - that's what most Blazers came with...

Check this link for help in sealing the speedo cable... This guy is over on coloradok5.com - very cool website...

http://www.norcalbigdawgs.net/Gallery/album49

Blizz · 07-23-2006, 10:44 PM

Quote:

Originally Posted by Scrubby

Unless the case is cracked, to fix any leak you are looking at gaskets and seals. I got my rebuilt kit from Transmission Exchange (http://www.txchange.com/).

Pete

Hey thanks for the recommendation. I called them and ordered ALL the seals, gaskets for the tfer case, the gasket for the tranny and an O ring for $27. They're good people and the prices were good.

Blizz · 10-05-2006, 02:55 PM

bump

Critter · 11-09-2006, 06:42 PM

This is an old thread by Blizz, but I am having the same problem. Currently the transmission and Tcase are pulled out of the blazer and unbolted from one another (th350/np205 - 27 spline with drive sleeve) I believe the seal in question is actually in the adapter plate on mine. Do I get to this by pulling everything out from the transmission side and work my way back? I know this is a technical question and could use some pictures, sorry.

Blizz, how did yours turn out?

orange72blazer · 11-09-2006, 11:20 PM

I'm having the same problem also (tranny fluid in the tcase). I put new gaskets and seals in it a few years ago but it didn't help. I plan on taking the trans. and tcase out again this winter to inspect and reseal again. Is there anyone that has a diagram that shows where all the seals and o rings go, I'm thinking I might have missed something when I did it the first time.

onetonk5 · 11-10-2006, 06:31 PM

to replace the seal in the transfer case adapter just unbolt it from the tranny and bolt off the transfer case...there are two seals inside the adapter.

Critter · 11-11-2006, 01:53 PM

Quote:

Originally Posted by onetonk5

to replace the seal in the transfer case adapter just unbolt it from the tranny and bolt off the transfer case...there are two seals inside the adapter.

Thats the way it looked to me. Is there anything that has to be pressed in or out? Im gonna try it later today or tomorrow.

07-16-2006, 09:43 PM	#1
Blizz Registered User Join Date: May 2006 Location: San Antonio, Texas Posts: 372	Help with tfer case...can someone maybe clue me in to where my transfer case MIGHT be leaking from? I know you can't tell much from this picture but it would be better than my guess. You guys are the experts around here. If it's just a gasket...where can I get the gaskets or seals for this thing? I'm a computer guy so any help that yall can give me or if someone could point me in the right direction, I'd really appreciate it. Thanks. __________________ '72 K5 CST Blazer 4x4 in perpetual progress '96 2dr Tahoe 4x4 daily driver, Black Bear Performance tune, 285-75-16 Nitto Grapplers, Magnaflow muffler, K&N Air filter, Bilstein Shocks.........E-fan, DT Tri Y or Pacesetter LTs coming soon Last edited by Blizz; 07-16-2006 at 09:44 PM.

07-16-2006, 11:17 PM	#2
jamie72 Senior Member Join Date: Apr 2000 Location: madison indiana Posts: 3,836	Re: Help with tfer case...can someone my first place to check fro mthe pic is where your speedo cable screws in the the ratio box on the side of the case looks like you cable might be pulling on it a little and that could cause a leak. i would wipe it down good then drive it a little the check it again. good luck jamie __________________ jamie72 72 BB cheyenne -- Restoration getting started.. member #807 http://www.myspace.com/whitetailobsession www.antlertalk.com

07-16-2006, 11:43 PM	#3
RunTMCfan Registered User Join Date: Oct 2005 Location: San Diego, Ca Posts: 251	Re: Help with tfer case...can someone You really shouldn't have any leaks of Gear Oil above the fill bolt. If you are experiencing leaks that high up I would guess that you have ATF in there from your tranny. A brand new set of Tcase gaskets will succomb to an overfilling of ATF. Those seals at the top aren't really meant to have fluid against them at all times. You may have to pull out your tcase and redo that big O ring from the tranny to the Tcase. Since you have the Tcase out I would have it resealed as well. You can do it on your own but you have to pull the gears apart. __________________ Rob "RunTMCfan"

07-18-2006, 11:40 AM	#5
ClassicStyle Registered User Join Date: Aug 2005 Location: Scottsdale, AZ Posts: 215	Re: Help with tfer case...can someone Clean it all off, and see where a fresh leak starts from. Its hard to tell after they've been driven a lot becuase the fluid gets thrown everywhere. Its probally leakin from the snout of the transfercase, my 82' started there right before i sold it. -Cameron also check if your tranny is leaking, its entirely possible its throwing fluid back onto the transfercase. I had my father's dealership do a oil change on my truck and they dropped the oil filter, which cause it to leak, by the time i got home and realized it was leaking i had oil covering the entire undercarrage, from enigine to rear driveshaft. __________________ 1972 Dark blue, Cst, Highlander Last edited by ClassicStyle; 07-18-2006 at 11:44 AM.

07-18-2006, 02:28 PM	#6
Blizz Registered User Join Date: May 2006 Location: San Antonio, Texas Posts: 372	Re: Help with tfer case...can someone If it is leaking from there, what kind of repair would I need to do? Are we talking gaskets and seals here or something worse? __________________ '72 K5 CST Blazer 4x4 in perpetual progress '96 2dr Tahoe 4x4 daily driver, Black Bear Performance tune, 285-75-16 Nitto Grapplers, Magnaflow muffler, K&N Air filter, Bilstein Shocks.........E-fan, DT Tri Y or Pacesetter LTs coming soon

07-19-2006, 02:51 PM	#7
Scrubby Check out GMTrucks.org Join Date: Sep 2003 Location: Boise, Id Posts: 284	Re: Help with tfer case...can someone Unless the case is cracked, to fix any leak you are looking at gaskets and seals. I got my rebuilt kit from Transmission Exchange (http://www.txchange.com/). Pete

07-20-2006, 01:16 AM	#8
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,634	Re: Help with tfer case...can someone Looks like he is full of atf, look at the color of the oil dripping off the speedo parts. Pull the FILLER plug out and see what happens. May have to pull the case to install new seals in between the 2 units. At that point I would reseal the whole t-case myself.

07-20-2006, 11:32 PM	#9
Blizz Registered User Join Date: May 2006 Location: San Antonio, Texas Posts: 372	Re: Help with tfer case...can someone excellent advice yall. thanks a bunch. how do i find out what tranny i have? __________________ '72 K5 CST Blazer 4x4 in perpetual progress '96 2dr Tahoe 4x4 daily driver, Black Bear Performance tune, 285-75-16 Nitto Grapplers, Magnaflow muffler, K&N Air filter, Bilstein Shocks.........E-fan, DT Tri Y or Pacesetter LTs coming soon

07-21-2006, 12:09 AM	#10
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,448	Re: Help with tfer case...can someone http://67-72chevytrucks.com/vboard/s...d.php?t=118528 This might help. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

07-21-2006, 10:40 AM	#11
IGOR Registered User Join Date: Feb 2003 Location: Damascus, OR Posts: 260	Re: Help with tfer case...can someone Looks like a T350 to me - that's what most Blazers came with... Check this link for help in sealing the speedo cable... This guy is over on coloradok5.com - very cool website... http://www.norcalbigdawgs.net/Gallery/album49 __________________ -Ben 1972 CST K5 - Undergoing frame off, 8.1/4L80E/NP205, 3/4 ton, 8" lift, currently a pile of parts that when assembled resemble a Blazer 1972 K10 - Rust Bucket, TBD 1976 C10 SWB, 350 / T350 My blazer build thread: https://ck5.com/forums/builds/72-k5-...17-update.410/

10-05-2006, 02:55 PM	#13
Blizz Registered User Join Date: May 2006 Location: San Antonio, Texas Posts: 372	Re: Help with tfer case...can someone bump __________________ '72 K5 CST Blazer 4x4 in perpetual progress '96 2dr Tahoe 4x4 daily driver, Black Bear Performance tune, 285-75-16 Nitto Grapplers, Magnaflow muffler, K&N Air filter, Bilstein Shocks.........E-fan, DT Tri Y or Pacesetter LTs coming soon

11-09-2006, 06:42 PM	#14
Critter Future TOTM Winner Join Date: Aug 2006 Location: Bulverde, TX Posts: 2,692	Re: Help with tfer case...can someone This is an old thread by Blizz, but I am having the same problem. Currently the transmission and Tcase are pulled out of the blazer and unbolted from one another (th350/np205 - 27 spline with drive sleeve) I believe the seal in question is actually in the adapter plate on mine. Do I get to this by pulling everything out from the transmission side and work my way back? I know this is a technical question and could use some pictures, sorry. Blizz, how did yours turn out? __________________ 72 Chevy CST K5 HIGHLANDER BLAZER Getting a 6.0,NV4500,NP205,14BFF (Currently laying all over the place in little pieces) 72 Chevy swb step-side "LS" 6.0 Here's a build thread of sorts 2002 HD2500 Crew Cab, 8.1L Allison 4x4 Daily Driver Check it out www.lsdyno.com

11-09-2006, 11:20 PM	#15
orange72blazer Registered User Join Date: Dec 2003 Location: West Michigan Posts: 447	Re: Help with tfer case...can someone I'm having the same problem also (tranny fluid in the tcase). I put new gaskets and seals in it a few years ago but it didn't help. I plan on taking the trans. and tcase out again this winter to inspect and reseal again. Is there anyone that has a diagram that shows where all the seals and o rings go, I'm thinking I might have missed something when I did it the first time. __________________ 1972 Chevy Blazer 1997 GMC Sierra 2009 Chevy Tahoe

11-10-2006, 06:31 PM	#16
onetonk5 Cereal Killer Join Date: Jan 2006 Location: Montgomery, Alabama Posts: 639	Re: Help with tfer case...can someone to replace the seal in the transfer case adapter just unbolt it from the tranny and bolt off the transfer case...there are two seals inside the adapter.



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