Q: Torque spec for transfer case drain plugs

Just snug them up, that's all I did when I serviced my Yukon. The plugs are
harder than the case they go into. A drain plug is a drain plug is
a..............


> "NewsSkimmer" <NewsSkimmer.RemoveThis@sbcglobal.net> wrote in message
> news:jeF5k.12891$Ri.7323@flpi146.ffdc.sbc.com...
>>I need to change the fluid in my 99 OBS Tahoe's transfer case.
>>
>> Both the NPT drain plugs and the case are looking mighty soft. Can any of
>> you techs tell me how tight to tighten the plugs?...maybe a torque spec
>> from the guides? I'd like to just set the torque wrench and be safe.
>>
>> I have the New Process two-speed push-button model.
>>
>> Thanks in advance.
>>
>>
>
>
 >> Stay informed about: Q: Torque spec for transfer case drain plugs 

These NPT drain plugs are as soft as butter....that scares me that the case
is even softer.

NPT plugs like this are a pita.

Thanks for your help....I'd still like a torque value if anybody has it.

skimmer

"Repairman" <repairman54 DeleteThis @embarqmail.com> wrote in message
news:g3df1q$tpt$1@aioe.org...
> Just snug them up, that's all I did when I serviced my Yukon. The plugs
> are harder than the case they go into. A drain plug is a drain plug is
> a..............
>
>
>> "NewsSkimmer" <NewsSkimmer DeleteThis @sbcglobal.net> wrote in message
>> news:jeF5k.12891$Ri.7323@flpi146.ffdc.sbc.com...
>>>I need to change the fluid in my 99 OBS Tahoe's transfer case.
>>>
>>> Both the NPT drain plugs and the case are looking mighty soft. Can any
>>> of you techs tell me how tight to tighten the plugs?...maybe a torque
>>> spec from the guides? I'd like to just set the torque wrench and be
>>> safe.
>>>
>>> I have the New Process two-speed push-button model.
>>>
>>> Thanks in advance.
>>>
>>>
>>
>>
>
>
 >> Stay informed about: Q: Torque spec for transfer case drain plugs 

NewsSkimmer wrote:
> These NPT drain plugs are as soft as butter....that scares me that
> the case is even softer.
>
> NPT plugs like this are a pita.
>
> Thanks for your help....I'd still like a torque value if anybody has
> it.
> skimmer
>
> "Repairman" <repairman54 DeleteThis @embarqmail.com> wrote in message
> news:g3df1q$tpt$1@aioe.org...
>> Just snug them up, that's all I did when I serviced my Yukon. The
>> plugs are harder than the case they go into. A drain plug is a
>> drain plug is a..............
>>
>>
>>> "NewsSkimmer" <NewsSkimmer DeleteThis @sbcglobal.net> wrote in message
>>> news:jeF5k.12891$Ri.7323@flpi146.ffdc.sbc.com...
>>>> I need to change the fluid in my 99 OBS Tahoe's transfer case.
>>>>
>>>> Both the NPT drain plugs and the case are looking mighty soft. Can
>>>> any of you techs tell me how tight to tighten the plugs?...maybe a
>>>> torque spec from the guides? I'd like to just set the torque
>>>> wrench and be safe.
>>>>
>>>> I have the New Process two-speed push-button model.
>>>>
>>>> Thanks in advance.

15 foot pounds is probably in the ball park. According to my 2005 Silverado
factory shop manual, transfer case drain/fill plug torque specification is
20Nm or 15 lb. ft. for NVG 149-NP3, NVG 246-NP8, NVG 261-NP2, and NVG
263-NP1. Hope this helps.
 >> Stay informed about: Q: Torque spec for transfer case drain plugs 

Okay here ya go per my 1999 GM Yukon factory shop manual.

2 speed auto trac transfer case.
Drain plugs are aluminum and case is magnesium. Only aluminum plugs can be
used due to corrosion issues.
Torque spec is 35 ft. lbs. . Which is snug.........

> NewsSkimmer wrote:
>> These NPT drain plugs are as soft as butter....that scares me that
>> the case is even softer.
>>
>> NPT plugs like this are a pita.
>>
>> Thanks for your help....I'd still like a torque value if anybody has
>> it.
>> skimmer
 >> Stay informed about: Q: Torque spec for transfer case drain plugs 

Thanks everyone. I did this job last week and so far so good. I changed the
fluid out to the new blue stuff. I can post the part number if you need it.

On the torque, I finally found two torques listed in my book. One for the
B-W and one for the New Venture. I'm pretty sure that the two-speed
pushbutton x-fer case is New Venture because the tag said New Process. The
torque also showed 35 for the N-V as reported in the other post by
repairman.

After two drain and re-fills to get all the old stuff out, I torqued the
plugs. I chose my smallest torque wrench and it went only to 250
in-lbs...about 20 ft-lbs. This wrench is about the length of a nice 1/2"
drive ratchet. The plug started to show some resistance and started to run
out of thread before getting to the 20....so I just stopped. I'll watch for
leaks and only tighten it more if I have to. I doubt it will leak or vibrate
out. I hope never to take these plugs out again.

35 ft-lbs just seems too tight for such soft materials. I think the number
should be closer to the number reported by klutz. That's the one bad thing
about old manuals, etc. When GM makes changes, the consumer doesn't get the
update. Same thing happened to me on some Ford spark plugs in an aluminum
head.

Skimmer


"Repairman" <repairman54.RemoveThis@embarqmail.com> wrote in message
news:g3li0e$n16$1@aioe.org...
> Okay here ya go per my 1999 GM Yukon factory shop manual.
>
> 2 speed auto trac transfer case.
> Drain plugs are aluminum and case is magnesium. Only aluminum plugs can be
> used due to corrosion issues.
> Torque spec is 35 ft. lbs. . Which is snug.........
>
>> NewsSkimmer wrote:
>>> These NPT drain plugs are as soft as butter....that scares me that
>>> the case is even softer.
>>>
>>> NPT plugs like this are a pita.
>>>
>>> Thanks for your help....I'd still like a torque value if anybody has
>>> it.
>>> skimmer
>
>
 >> Stay informed about: Q: Torque spec for transfer case drain plugs