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derotoreut 07-31-2019 06:32 PM

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.

sweetk30 07-31-2019 06:51 PM

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 .

derotoreut 07-31-2019 08:21 PM

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.

sweetk30 07-31-2019 10:35 PM

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 .

kwmech 07-31-2019 11:01 PM

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

jeffahart 08-01-2019 12:00 AM

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. :chevy:


J

derotoreut 08-01-2019 03:36 PM

Re: NP205 install question
 
Quote:

Originally Posted by jeffahart (Post 8568430)
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. :chevy:


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.

1972ochre4x4 08-02-2019 08:06 AM

Re: NP205 install question
 
I use Indian Head sealer on bolts going into oil passages

derotoreut 08-02-2019 11:41 AM

Re: NP205 install question
 
Quote:

Originally Posted by 1972ochre4x4 (Post 8569022)
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?

1972ochre4x4 08-02-2019 11:56 AM

Re: NP205 install question
 
Works great on freeze plugs too


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