Home » Public Forums » GMCnet » Why GMCs Won't Get 20 MPG
| Why GMCs Won't Get 20 MPG [message #126845] |
Fri, 20 May 2011 23:26  |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma:
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Senior Member |
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Here is one I didn't see coming. After changing the final drive my trans burped a couple of times causing smoke and junk on my back window. No fire.
I jacked her up and cleaned everything off and tightened a couple of things.
Because it was on two stands and a strong floor jack, I decided to run it a bit in drive (to see if I could get a drip anywhere). No leaks... so far.
I know it is stupid to run a rig at 55 on jacks, but, please, just let that one go.
I happened to glance at my EBL Whats Up Display and saw that I was getting 20 mpg. This was interesting because I was only turning the engine/trans/final drive/CVs/speedometer and bearings. It was quiet and no vibration (good balance on tires) .
I decided to wait a few more seconds for LeanCruise to kick in and sure enough I was rewarded with 21mpg.
So, getting 10 mpg when actually driving is pretty good when the whole thing only gets 21 with the wheels off the ground.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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