driveshaft

[Hummertime]

does anyone know if the front driveshaft can be pulled for better mpg. i am preparing to make a several cross country trips.

[Hummertime]

does anyone know if the front driveshaft can be pulled for better mpg. i am preparing to make a several cross country trips.

[shipbldr]

Yes it can... I've read about others removing the front drive shaft.

One good example is removing it for dyno testing.

What other effects it might have on the truck (i.e. better milage, impact on traction control (if any), I can't vouch for....)

I'd be interested to hear about the impact on the milage when you are done.

[PARAGON]

Aside from Phil's question, I have a question more to the point. Why?

The biggest detractor to mileage is probably aero on a cross-country trip. Can't do a whole lot about that.

What is removing the front shaft going to accomplish? You still have friction drag from all of the front driveline components and the gears usually powering the front output shaft in the Tcase. The only thing you've done is remove some dead weight.

[DRTYFN]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by PARAGON:
Aside from Phil's question, I have a question more to the point. Why?

The biggest detractor to mileage is probably aero on a cross-country trip. Can't do a whole lot about that.

What is removing the front shaft going to accomplish? You still have friction drag from all of the front driveline components and the gears usually powering the front output shaft in the Tcase. The only thing you've done is remove some dead weight. </div></BLOCKQUOTE>

X2
Seriously, WTF is Hummertime thinking? If MPG is an all consuming issue go buy something more aerodynamic and fuel efficient.

[PARAGON]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by PhilD:
You'd most probably want to throw the shaft in the trunk anyway "just in case", so you wouldn't even lose any weight http://www.elcova.com/infopop/emoticons/icon_wink.gif </div></BLOCKQUOTE>Maybe strap it to the front bumper so the front/rear weight split remains at or near the same. http://www.elcova.com/infopop/emoticons/icon_wink.gif

[ree]

You guys are getting sloppy here. If you put it on the front bumper, it acts as a longer level over the front wheels and biases the weight to the front too much. Nothing an alignment wouldn't fix though http://www.elcova.com/infopop/emoticons/icon_wink.gif

[shipbldr]

Oh yeah, I forgot....

After removing the front driveshaft you'll need to do a 4 wheel alignment...