Transfer case stupid question thread

[Butch]

Can you shift into four wheel high while driving? I have always stopped but my girlfriend reached down and yanked it into four wheel high going about 35mph. It was fine but since I dont feel like replacing anything right now I figured i'd ask the experts.

You can but I prefer to be stopped and if you do it, it shouldn't be any faster than 25mph IMO I've done it with both push button (NP243/non autotrac) and floor shifted (NP241) many times out of necessity with only having to replace the rear seal on the NP243 but keep in mind your meshing moving parts that would fair better from lower speeds or non at all.

 

[Kable]

yup i think ill stick with stopping, but there is no need to put it in Neutral right

 

[Canada RCSB Mike]

Hey Guys,

Spoke with the dealer the other day about my transfer case. wondering what model was in my truck due to the aluminum tag falling off. They have told me thats its a
NP1 transfer case. This is all new to me but does this coincide with another model. Is this transfer case fairly strong or should I look at upgrading.

Also if I re-gear the rear from 3:73 to 4:56 waht should I do to the front diff?

Thanks all

 

[Butch]

What year is the truck? Model? I assume 1/2 ton
How does your truck shift into 4x4? Lever on the floor? Electronic push button? Push button with "auto 4x4"?
What do you plan to do with the truck? The NP241 will hold up to a lot of abuse.
Whatever gears you put in the rear you must match in the front if you want to use 4x4. If they're 4.56s in the back you want 4.56s up front.

 

[RHamill]

You can shift in to 4hi while moving, 4lo you must be stopped and in neutral. My 4hi doesnt like disengaging until I turn truck off and turn it back on..

 

[slim]

alrught kind of a stupid question here. i was lookin under my pickup to see what tcase i have and on the tag it says 243 at the top, then on the bottom of the tag it says 272. i have push button 4x4 but no auto trac, is there such thing as an np272 or do i just have the np243 like i think i have?

 

[RHamill]

You have an NP243, 2.72 is what it converts you to when in 4lo, I believe. Someone correct me if I am wrong.

 

[slim]

ah i see, thanks

 

[irishluder]

I have a 96 suburban 4x4 with 7.4l

what size is the hex bolt to drain the T-case?

 

[joshjuniorr]

Sweet so my 1992 one ton/3500 has a borg warner. awesome