t-case, tranny and engine leaks....76GMC 4X4

[Paso76GMCstepper]

Ok Guys here’s a question:

I have a 1976 GMC K15 4X4 350 SB and a 4-speed granny low tranny. I have various oil leaks. I want to pull the engine, tranny, and transfer case. It is a locking hub front end. What am I looking at? Does anyone know what I have tranny and t-case wise. Part numbers would be awesome.

[Paso76GMCstepper]

Anyone have any info.

Thanks

[1969 GMC]

you have an SM465 4 speed transmission, and since you have lockouts it is most likely a NP205 transfer case. have fun taking them out, the NP205 weighs 135# and the tranny close to 200.

[plumbcut]

69 GMC is right, but I dunno about some of those numbers. The np205 is ridiculously heavy, as in so heavy that you dont wanna carry it by yourself unless you HAVE to. Im thinking closer to the 200 pound range.. a 90lb bag of concrete is like a joke.. I would at least double that to get the weight of the t-case... The sm465 is pretty heavy too but I dont remember it being a nut buster like the transfer case.

anyways, yes you have a SM465+NP205.. Best way to remove this stuff in my opinion is drop the tranny and transfer case as a whole underneath, then pull the engine... I personally am not a big fan of dismanteling the front clip, but you can either remove the entire front clip, or just the radiator support and pull the entire heap out as a whole, thru the front. To me, thats a little more of a hassle then just crawling underneath and unbolting a bellhousing or few bolts @ the transfer case. Plus then you need a really heavy duty engine hoist...

anyhow, good luck

pc

[Paso76GMCstepper]

Thank you all I will be getting gaskets and be doing this next week sometime.

Thnaks again,

As always any more info would be super

[1969 GMC]

Originally posted by plumbcut
69 GMC is right, but I dunno about some of those numbers. The np205 is ridiculously heavy, as in so heavy that you dont wanna carry it by yourself unless you HAVE to. Im thinking closer to the 200 pound range.. a 90lb bag of concrete is like a joke.. I would at least double that to get the weight of the t-case... The sm465 is pretty heavy too but I dont remember it being a nut buster like the transfer case.

maybe you are thinking of the NP203...that does weigh 200#, but its the fulltime transfer case.

I have a NP205 and a 465 in my garage now, and I can say with certainty the 465 is heavier. ALOT heavier. I can pick it up and move it around, but not for long distances. The NP205 isn't much of a problem, its just bulky and the shift rails like to poke your arms.

as far as seals go...we dont need no stinkin seals! a tube of RTV is all ya need!

[1FaastC10]

SM465, NP205, and being a 76 it should have a Dana 44 front axle, and a 12 bolt rear. very good setup for offroading with 35" tires or smaller. i would pull the engine by itself, then unbolt the floor hump (if you can?) open a door, and push the engine hoist in through the door. run a chain around the trans and transfer case, and lower them to the floor with it. my buddy has done this in his 84 K10 with a 465/205 in it a couple times, and he says it works great.

[ryanroo]

i managed to push a sm465 up and into my 72 with 8 inches of lift and 39s, then do the same for the 205, and get it all bolted up. they are akward more than heavy to deal with. for me the easiest way to do it is drop the tranny and tcase one at a time from the bottom and then yank the motor as per normal.
Ryan

[ezmaggie]

I know this doesn't answer your ?, however as many oil-leakers as I have had in my life...I just found out from the guys at autozone that there is a black-lite type stuff that you can put in your engine, radiator (didn't have the money that day) start up your truck and see where the leaks are ORIGINATING from, as well as where they end up...which usually isn't near the start!!! Hope this helps a little. Maggie