Go Back   F150online Forums > Powertrain & Mechanical > Other Powertrain
Sign in using an external account
Register Forgot Password?
Register Photos Vin Decoder FAQ Members Search Today's Posts Mark Forums Read VendorsGarage




Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
  #1  
Old 09-29-2002, 04:14 AM
Senior Member
Garage is empty, add now
 
Join Date: Sep 2002
Location: USA
Posts: 2,354
Question What type of gear oil to use?

I have a 97 F150 with over 77k miles,3:55 open face rear.The tag says "75w140 Synthetic Only" on the rear end.Do i "have" to go back with synthetic or can i go conventional? And do i have to use 75w140 or a different weight? Any advice is greatly appreciated.
__________________


2007 F150, 4.2 V6, 106K Miles
Reply With Quote
  #2  
Old 09-30-2002, 08:12 AM
AB AB is offline
Senior Member
Garage is empty, add now
 
Join Date: Jun 2001
Location: Rochester, MI, USA
Vehicle: 1997 Ford F-150
Posts: 205
Hi,
Please do yourself a favor - put in what it says.
It is expensive but it is for 100000 mi and you would not have problems.
Search the forum to get more info.
Alex.
Reply With Quote
  #3  
Old 10-02-2002, 07:38 PM
Senior Member
Garage is empty, add now
 
Join Date: Mar 2002
Location: NH
Vehicle: 2007 Ford F150
Posts: 4,867
Just for your information I have an 01 4.2 5-speed with the 3.55LS. I just bought some Royal Purple 75W-140 synthetic on-line for $7.36 a qt. My rear-end calls for 5.5 or 5.7pts so I bought 4 qts to have 1 qt as a spare. I have read alot of good things on here about Royal Purple, along with Mobile 1, Amsoil and Redline. Redline does not have 75W-140 so some guys use their 75W-90 but I wanted to go with what was recommended (75W-140).

The Amsoil is pretty expensive per qt. I think it was something like $11-$12. I would have went with Mobile 1 hoping to buy it here somewhere local but no luck only 75W-90 in the mobile 1.

I also bought the Royal Purple Max synthetic ATF for my manual transmission at a cost of $6.99 a qt. Bought it through northerautoparts.com

I plan on changing the trasmission and rear-end fluid every 30,000 miles.
Reply With Quote
  #4  
Old 10-02-2002, 07:55 PM
Senior Member
Garage is empty, add now
 
Join Date: Apr 2002
Location: Dallas
Vehicle: 2003 Ford F150
Posts: 1,997
dont forget the friction modifier...

VERY IMPORTANT...it protects the clutch linings in the limited slip gearing...i also have a 97 with 3.55 and 80000 started this wierd whinning at above 40 MPH,just kept getting louder.took it in yada yada yada. 600 bucks and all the bearings later(pinion,carrier and axle) plus seals. sounds good and a good thing i did take it in ...life expectacy was short and could have cost three times more if it had tanked
Reply With Quote
  #5  
Old 10-02-2002, 09:23 PM
Senior Member
Garage is empty, add now
 
Join Date: Mar 2002
Location: NH
Vehicle: 2007 Ford F150
Posts: 4,867
TexfordD:

You made a good and important point. I forgot to mention that in my post so glad that you did. As a matter of fact I asked (e-mailed) Royal Purple and asked them if I need to add the friction modifier and there answer was no, that it was already in their 75W-140.

I then decided to ask here on this site and actually posted my question to Mike in the Superchips forum. He said what "he" does is ALWAYS adds the friction modifier regardless if its already in the brand you may be using be it Amsoil, Mobile 1, Royal Purple, Redline etc. So after getting that reply from Mike who does alot of high performance testing on the F150 I decided that I would add the friction modifier to the Royal Purple when I do get it. It cost like $5.50 from my Ford dealer for 4oz. which is what I need for my rear-end.
Reply With Quote
  #6  
Old 10-03-2002, 06:56 PM
Senior Member
Garage is empty, add now
 
Join Date: Apr 2002
Location: Dallas
Vehicle: 2003 Ford F150
Posts: 1,997
your welcome...

thats why i caps the very important....nothing like finding out when your trucks up on the lift....of course the guys at the axle shop said mine was a fluke(lucky me)...by the way thats where i took mine...to a shop that does nothing but axles and driveshafts...no tune ups,no tires...nothing but axles...i fiqure i saved about 250 bucks by doing that...thier faster,know what thier doing and don't give you a case of the "maybe's"...that "maybe" cost you a flat rate of 75 an hour while they try to figure it out,at your expense
Reply With Quote
Old 10-03-2002, 06:56 PM


 
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 On
Trackbacks are Off
Pingbacks are On
Refbacks are Off



All times are GMT -4. The time now is 02:56 PM.


 
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company
Contact Us Advertising Privacy Statement Terms of Service Jobs Forum Text Archives
Emails & Contact Details

Search Engine Friendly URLs by vBSEO 3.5.2