The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > All 4x4 Tech & Off Roading

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-31-2019, 06:32 PM   #1
derotoreut
Roto Reuter thats the name...
 
derotoreut's Avatar
 
Join Date: Feb 2010
Location: Darien, NY
Posts: 1,318
NP205 install question

I've searched this with no luck. Do I need to put some type of silicone or RTV on the adapter-to-NP205 bolts. Some of these bolt holes are open to oil side. Thanks.
__________________
~ Dan
My Chevy Pics:https://app.sugarsync.com/iris/wf/D7...115878_6210284
My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394

1970 SWB Fleet K10 4X4, 4 spd, PS, PB, AC, AM/FM
1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project

"Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977
derotoreut is offline   Reply With Quote
Old 07-31-2019, 06:51 PM   #2
sweetk30
selective wrench turner guy
 
sweetk30's Avatar
 
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,145
Re: NP205 install question

first off there needs to be the correct gasket between the 205 case and adapter or you WILL break the adapter when bolts go tight .

and if me i would put a little rtv on the threads to seal them up were there a open hole in to the case just so its less of a leak point down the road .
__________________
77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
-----------------------------
HOLLEY SNIPER efi = worst case of p.i.t.a i ever had .

EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
sweetk30 is offline   Reply With Quote
Old 07-31-2019, 08:21 PM   #3
derotoreut
Roto Reuter thats the name...
 
derotoreut's Avatar
 
Join Date: Feb 2010
Location: Darien, NY
Posts: 1,318
Re: NP205 install question

Yes I have the proper gasket to go between the adapter and transfer case. Actually I'm doing an engine swap going from 307/SM465/NP205 to 5.3L LM7/4L60E/NP205. I'm using Advanced Adapters for the NP205 10-spline to 4L60E. They sent me the gasket. I have read that you must use the gasket, but I wasn't sure about sealing the bolts. If I couldn't find anything I planned to put some RTV on the bolts. I also read several posts about NOT using the NP205 torque mount that installs to the frame. I'm not sure about that one yet.
__________________
~ Dan
My Chevy Pics:https://app.sugarsync.com/iris/wf/D7...115878_6210284
My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394

1970 SWB Fleet K10 4X4, 4 spd, PS, PB, AC, AM/FM
1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project

"Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977
derotoreut is offline   Reply With Quote
Old 07-31-2019, 10:35 PM   #4
sweetk30
selective wrench turner guy
 
sweetk30's Avatar
 
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,145
Re: NP205 install question

just making sure you know the gasket was all .

and most now say no frame to t-case mount it can brake the trans tail housing in frame flex off road stuff . better to do the newer trucks brace rod from t-case to bell housing bolt / stud .
__________________
77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
-----------------------------
HOLLEY SNIPER efi = worst case of p.i.t.a i ever had .

EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
sweetk30 is offline   Reply With Quote
Old 07-31-2019, 11:01 PM   #5
kwmech
Senior Member
 
Join Date: Mar 2003
Location: Colfax-California
Posts: 5,738
Re: NP205 install question

Pic one or 2 holes that go through into the oil cavity and install a stud. Makes it easier when installing and trying to line things up. Those things are 150 lbs.. ish
kwmech is offline   Reply With Quote
Old 08-01-2019, 12:00 AM   #6
jeffahart
Senior Member
 
jeffahart's Avatar
 
Join Date: May 2012
Location: Los Angeles, CA
Posts: 1,624
Re: NP205 install question

I think it's the 465 side of the adapter that has a couple of through bolts at the center. And the PTO covers each have a couple through bolts too.

I use just use a bit of head bolt thread sealant.

And like said, be damned sure you have the correct tolerance gasket for the adapter.


J
__________________
White K20
jeffahart is offline   Reply With Quote
Old 08-01-2019, 03:36 PM   #7
derotoreut
Roto Reuter thats the name...
 
derotoreut's Avatar
 
Join Date: Feb 2010
Location: Darien, NY
Posts: 1,318
Re: NP205 install question

Quote:
Originally Posted by jeffahart View Post
I think it's the 465 side of the adapter that has a couple of through bolts at the center. And the PTO covers each have a couple through bolts too.

I use just use a bit of head bolt thread sealant.

And like said, be damned sure you have the correct tolerance gasket for the adapter.


J
Put it this way... I have two gaskets. One from a transmission shop and the other from Advanced Adapters to use with their 4L60E/NP205 adapter. They better be right. I have no way to tell if they're not.
__________________
~ Dan
My Chevy Pics:https://app.sugarsync.com/iris/wf/D7...115878_6210284
My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394

1970 SWB Fleet K10 4X4, 4 spd, PS, PB, AC, AM/FM
1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project

"Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977
derotoreut is offline   Reply With Quote
Old 08-02-2019, 08:06 AM   #8
1972ochre4x4
Registered User
 
Join Date: Apr 2019
Location: Florida
Posts: 10
Re: NP205 install question

I use Indian Head sealer on bolts going into oil passages
1972ochre4x4 is offline   Reply With Quote
Old 08-02-2019, 11:41 AM   #9
derotoreut
Roto Reuter thats the name...
 
derotoreut's Avatar
 
Join Date: Feb 2010
Location: Darien, NY
Posts: 1,318
Re: NP205 install question

Quote:
Originally Posted by 1972ochre4x4 View Post
I use Indian Head sealer on bolts going into oil passages
That's a new one. Isn't that low temp shellac type gasket material?
__________________
~ Dan
My Chevy Pics:https://app.sugarsync.com/iris/wf/D7...115878_6210284
My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394

1970 SWB Fleet K10 4X4, 4 spd, PS, PB, AC, AM/FM
1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project

"Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977
derotoreut is offline   Reply With Quote
Old 08-02-2019, 11:56 AM   #10
1972ochre4x4
Registered User
 
Join Date: Apr 2019
Location: Florida
Posts: 10
Re: NP205 install question

Works great on freeze plugs too
1972ochre4x4 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 09:46 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com