I have a Stock 99 L, with and oil breather and a boost bypass. I just got it 2 weeks ago. Going to be getting everything that doesnt need a chip before i get the good stuff.
Do I need a chip for:

factory tech valve body?
373 gears?
5" driveshaft?
Electric Fan with Cobra water pump?

Thanks Guys
Mike

 

No, you don't need a chip.

 

No. Your mph will be off with the gear switch though.

 

i've heard some run lean w/ a breather cap and no chip but i'm not certain.

 

Never liked how my truck ran with a breather, so I don't have one any longer. But a chip can take care of your gear thing and also get you some horsepower if you're tuner has a clue...

 

Thanks guys, I didnt think i did, just making sure. I may have just got my truck a few weeks ago, but ive been on this board and NLOC everyday for the last 3-4 years.
Mike

 

Everyone needs a chip!

 

.............and a pulley

 

You don't need a chip for the oil breather, but Sal showed me a hose he recommended plugging up. Don't remember the name of it though I could point it out. Maybe someone else around here can help you.

Since your mph will be off without a chip and the 3:73 gears I'd recommend getting a buddy to drive at the same speed as you to get an idea of where you're at just in case there is a cop around