Transfer case and Tranny

[canadian306bogger]

I have a np203 should i try and find a 205 a 208 or should i do the conversion to make it optional 4x4 or just leave it. Also i have a turbo 350 should i upgrade to the 400 or the 700r4 or can you beef up the 350 for a decent price

Thanks

 

[76zimmer]

what engine and output are you running, and what are your plans for the truck?

 

[canadian306bogger]

im planning to eventually have around 400 horse and 450 tourque and used mostly for bogging but some crawling too

 

[Silver84k5]

im planning to eventually have around 400 horse and 450 tourque and used mostly for bogging but some crawling too

If you are really going to crawl, youll want a doubler. The th400 or the th350 will thank you for it.....

Im on my 3rd th350. The first one was the trans that came in my 77 jimmy when i bought, so who knows the condition of it, but I broke a low reverse sprag ( i think thats what its called lol) The second one i burned up trying to crawl with just a 205.

That being said, This time around i have an external cooler, with an electric fan, and im going to put a temp gauge on it. I think if you keep the neutral drops to a minimum, watch the heat, and keep the water out of it, it could last.

 

[76zimmer]

Thats a decent amount of output, If you have a T400/203 combo, your on your way to a doubler combo already. Like mentioned, if you want to "crawl" you'll want 4:1 or so in the t/c combo. It isn't a bolt in, but there is a lot of info on here about putting one together.
Personally I'm going the T400/203/205 combo with 32 spline outputs front and rear and 1410's at the each end of the driveshafts. With what I do, I think I will want all 3 options for t/c reduction.