Rear diff oil
Thread Starter
|
Freshman User
Joined: Mar 2006
Posts: 41
Likes: 0
Rear diff oil
i was wondering what you might recomend as the best oil for my rear diff. I was thinking about a fully syn 75w140 because of the cold climate i live in here or should i just stick to the 75w90 or even 80w90?
Cold man
Cold man
Posting Guru
Joined: May 2006
Posts: 2,274
Likes: 1
From: Milroy, PA
Second royal purple, I was told once, that its the only oil, you can add top off with any other oil in a pinch, and not have to worry about it. It was from a guy named Steve, at Differential Engineering, based out of florida. Thats all they do, is manufacture differentials, from factory rebuilds, to custom badass stuff for people doing truck pulls. He built mine for me, and hes got great customer service
Tuned
Joined: Apr 2005
Posts: 320
Likes: 1
I've experienced a significant fuel economy improvement using Lubrication Engineers 607. I have a Dana 61 with a limited slip in my F250, and after changing to LE607 my mileage went from 8.5 to slightly over 10mpg. Differentials are a real high friction area, at least older designs are.
Good luck!
Good luck!
Freshman User
Joined: Mar 2007
Posts: 42
Likes: 0
Probably a silly question but how do I tell which rear end is in my 99 F350 CC 4x4 manf. date of 5/98 ?
thanks
Scott
thanks
Scott
Trending Topics
Posting Guru
Joined: May 2006
Posts: 2,274
Likes: 1
From: Milroy, PA
Originally Posted by scottriddl
Probably a silly question but how do I tell which rear end is in my 99 F350 CC 4x4 manf. date of 5/98 ?
thanks
Scott
thanks
Scott
The more important question is, is it SRW or DRW. SRW should be a sterling 10.5, DRW should be a dana 80.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Elder User
Joined: Mar 2006
Posts: 751
Likes: 0
From: Greeneville,TN
Has anyone ran Schaeffers stuff. 75w-140. I am getting ready to install a Detroit Tru-trak and just wondered what people's thought were. I have had great success with their oil and trans oil.
Senior User
Joined: Jun 2004
Posts: 391
Likes: 0
From: west MI
only problem with Schaeffers is you have to buy a 5 gallon pail (unless they changed the packaging since last year). got Royal Purple in mine. Also think about putting on a better differential cover like a Mag Hytec
Senior User
Joined: Sep 2006
Posts: 224
Likes: 0
Originally Posted by rebelchevy02
The more important question is, is it SRW or DRW. SRW should be a sterling 10.5, DRW should be a dana 80.
Thanks in advance....
Steve
New User
Joined: May 2007
Posts: 7
Likes: 0
Tranny Lube
Originally Posted by Big O Dave
I've experienced a significant fuel economy improvement using Lubrication Engineers 607. I have a Dana 61 with a limited slip in my F250, and after changing to LE607 my mileage went from 8.5 to slightly over 10mpg. Differentials are a real high friction area, at least older designs are.
Good luck!
Good luck!
gsull
Senior User
Joined: Nov 2005
Posts: 370
Likes: 0
From: Maine
Originally Posted by lionsteve
For us differental dummies, can you give us a run down of what you are talking about? I have a 2000 F250. Where can I find what type of diff I have? I am going to replace the rusting diff cover and want to put the best fluid in I can find. Also does anyone have the instructions typed up somewhere on exactly how to change the diff cover and fluid?
Thanks in advance....
Steve
Thanks in advance....
Steve
Guzzles maintanance page would help you alot, I could`nt post the link for some reason but it`s easy enough to find. The most common rear on our single rear wheel trucks is the sterling 10.5 (ring gear) with a 3.73 (gear set)(ratio).Limited slip was optional. You should have a tag on the rearend housing that tells what you have. You can look up the codes that are on the tag with the search tools here.
Senior User
Joined: Jun 2004
Posts: 391
Likes: 0
From: west MI
http://guzzle.rbmicro.com/ for guzzles write ups. for what diff. you got look on the drvers door post sticker and go here https://www.ford-trucks.com/forums/4...lder_____.html for what the codes mean if your truck does not have the code on the door,mine does not have them, look on the tags on your diff.
Last edited by magnum300; May 28, 2007 at 09:08 PM.
