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Old 02-01-2010, 04:35 PM
Junior Member
Join Date: Feb 2010
Posts: 1
2005 Front Differential Fluid

I just had my 2005 Ford F150 STX 4.6 4X4 Standard Trans. front differential fluid changed and the mechanic put in Mobilelube HD 80/90. Will this cause me problems? Should I use something else what should I do?
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Old 02-04-2010, 09:24 PM
Join Date: Dec 2008
Location: Hibbing, MN
Vehicle: 2005 Ford FX4
Posts: 11
Thats not what the book calls for and there is a TSB out on fluis change to a 75W-140. I sent you an e-mail.
remember: it is what it is ...:beers:
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Old 02-05-2010, 01:42 AM
glc glc is offline
Senior Member
Join Date: Dec 2006
Location: Joplin MO
Vehicle: 2003 Ford F150
Posts: 28,515
The book calls for standard 80w90 in the FRONT differential, and you may use a 75w90 or 80w90 synthetic. The rear requires 75w140 synthetic.
2003 F-150 XL RCSB 2wd 4.2 M5OD 3.55 LS
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Old 02-08-2010, 12:25 PM
Join Date: Dec 2008
Location: Hibbing, MN
Vehicle: 2005 Ford FX4
Posts: 11
ooops my bad. didn't read that it was your front diff.
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Old 02-08-2010, 12:25 PM


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