Go Back   Jeep Garage - Jeep Forum > Jeep Technical Discussion > Troubleshooting/Problems Discussion

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #13  
Old 04-27-2010, 06:01 PM
John_R's Avatar
Member
My Jeep: 2005 5.7L WK
 
Join Date: Mar 2010
Location: SoCal
Posts: 290
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1871
John_R is on a distinguished road
Re: mileage decrease / transmission ?

You doing actual mpg and not relying on computer, which tends to be off. Fill up, mark odometer miles and how many gallons (not as important first logging and subsequent), then drive how ever much then fill-up again; divide miles driven by gallons it took to fill up. For some odd reason, I've been logging every gas visit since like 1990, ha ha. Interesting to see the trend of gas prices!

Have you checked your air pressure lately? How about your air filter? PCV?

I know you're saying about the fluid and such and timing though. I would assume they used the right stuff and it's weird that it would be thicker when new, unless the old was just worn out. I am not familiar on how thorough their "flush" is, but it makes me nervous flushing oil passages (esp in the engine and imagine tranny is worse), as sometimes sludge will get dislodged just enough to go where it's not supposed to. Not sure if you've ever looked at a valve body, but there are all sorts of critical passages, springs and balls in there!

Well, not saying that is the case, but just thought I'd throw it out there.
__________________

__________________
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Poor Mileage After New Transmission... Frankie Grand Cherokee - WK 25 04-30-2011 10:24 AM
srt8 mileage KidFresh5.7 Grand Cherokee SRT8 - WK 24 03-25-2010 09:13 PM
Transmission Flush? JUSToneJEEP Grand Cherokee - WK 45 02-08-2010 12:28 PM
Getting Horrible Gas Mileage Sodelcustoms Troubleshooting/Problems 16 01-20-2010 07:54 PM
4.7L gas mileage... Bigdiesel74 Performance Modifications 15 10-22-2009 09:58 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 08:36 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community