Better fuel economy with front output shaft (drive shaft) removed?

1196 Views 3 Replies 2 Participants Last post by K15 Blazer Guy, Jun 25, 2013

Family Force 6

Discussion Starter · Jun 25, 2013 (Edited)

Riddle me this..

Getting ready to do 1200 miles on my 99 suburban with a NP246 auto-trac transfer case. I have the front drives shaft out now to get a u-joint replaced which got me to thinking. Would I see an increase in fuel economy if I left it out for the trip? The front output shaft spins constantly with the auto-trac transfer case, however I understand that there is no "power" being sent to the front wheels.

And yes, I'm doing most of the basic tune-up stuff right now that will REALLY make a difference, including:

New O2 sensors
New distributor cap/rotor
New air filter
Oil change
Seafoam throttlebody treatment
A/C fixed (yea for A/C!)

I can't think of any reason why I would need to have it in.

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Family Force 6

Discussion Starter · #3 · Jun 25, 2013

K15 Blazer Guy said:
best way to boost your MPG is an intake, and delete the mechanical fan for a good electric one.

I've been looking at a couple threads on installing an electric fan. I'll continue to investigate, but not sure I'll be able to tackle that before we leave.

I've heard mixed things about the benefits of an air intake. What's your experience been as far as fuel economy gains and what brand did you use?

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