Rear diff Oil question - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by keystone cop, this thread has received 7 replies and been viewed 2206 times.

 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 09-24-2009, 03:04 PM Thread Starter
Junior Member
 
Join Date: Jan 2008
Posts: 24
Points: 1,956
Thanks: 0
Thanked 1 Time in 1 Post
Rear diff Oil question

I have a Dana 3.73 rear end with these numbers on the tag 606775-1. According to my owners manuel it states I am supposed to use 80w90 gear oil. Do i need to ad the rear diff suppliment, and also is this the correct oil to use? I used Lucas oil when i replaced it is this ok?
keystone cop is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 09-24-2009, 04:27 PM
Senior Member
 
CrowsSynthetics's Avatar
 
Join Date: Dec 2008
Location: St Clair Mo
Posts: 1,052
Points: 30,359
Thanks: 229
Thanked 126 Times in 86 Posts
Garage
Send a message via Yahoo to CrowsSynthetics
Quote:
Originally Posted by keystone cop View Post
I have a Dana 3.73 rear end with these numbers on the tag 606775-1. According to my owners manuel it states I am supposed to use 80w90 gear oil. Do i need to ad the rear diff suppliment, and also is this the correct oil to use? I used Lucas oil when i replaced it is this ok?
That weight is a little light Ford is not recommending that weight any more and an friction modifier is needed. You need to know a little more about the rear end Go here we use all manufactures recommendations.
Bill


2003 F250 FX4 SUPERCAB SPORT XLT 7.3 PSD
Amsoil 3000 5w 30 ,Amsoil EaAU Air Filter ,Amsoil Pre filter-EaPF13,
Amsoil Dual Remote By-pass BMK-16A, Amsoil ATF & Transfer case, Amsoil 75w-140 fluid front & rear end, Amsoil Antifreeze Fluid
Edge with Attitude, 4" Turbo Back Exhaust,
5" SS Tip
, Transmission Magnefine filter, Sportman Tonneau Cover & Bush Fender Flairs
Now in the stable a new Black 2009 Jetta Sedan TDI


Last edited by CrowsSynthetics; 09-24-2009 at 04:31 PM. Reason: added info
CrowsSynthetics is offline  
post #3 of 8 (permalink) Old 09-24-2009, 04:35 PM
Mod Friendly Title
 
Zaairman's Avatar
 
Join Date: Dec 2008
Location: St. Charles/Rolla, MO
Posts: 2,695
Points: 79,642
Thanks: 18
Thanked 117 Times in 106 Posts
Send a message via AIM to Zaairman
You need 75w140 and some diff fluids have the friction modifier already in it. I used Royal Purple which has it in it already. Good stuff.

Zach
2000/2006ish Ford F-250 Larryette 7.3 Powerstroke 4x4
5" Sewer Pipe Exhaust (video clip), DIY 6637 Intake, Wicked Wheel'd, De-foiled, Missing EBPV, Edge Juice with Attitude, X Code Springs, 33" BFGs (SUCK), Alpine W200, Pioneer "D" Series Kevlar 6x8"s, Sirius Satellite Radio, 12" Memphis Pro Audio Subwoofer.
20x10 Mickey Thompson Classic IIs, waiting on tires


SLAPS Member #153

Just because I kiss the prettiest girls and I drive my truck too fast, why does everybody want to kick my @ss?

Donut Video
Zaairman is offline  
post #4 of 8 (permalink) Old 09-24-2009, 05:18 PM
The one and only
 
Join Date: Jul 2009
Location: Ridgeville, IN
Posts: 410
Points: 22,515
Thanks: 16
Thanked 40 Times in 36 Posts
Garage
When i changed mine I used AMSOIL 75w140 and about 2 oz of friction modifier.

The reason I used 2 and not the recommended 4 is because that is what felt good to me.

I had problem with the limited slip not working so I changed the fluid and drove it. and added an oz of the stuff till it felt and drove good to me.

1999.5 Ford F-250 7.3l 4x4 PSD DI Short block, Ported Heads, Head studs, Over size valve springs, DI Push Rods, DI RR, GTP38R, GSL 392 fuel pump with 3/8 line feeding 238cc Injectors from Nate @ Unlimited Diesel and Tuning from Matt @ Gearhead Automotive


Auto to ZF6 Completed


520hp and 926tq - 5/23/09
Dyno Sheet
big_stroker is offline  
post #5 of 8 (permalink) Old 09-24-2009, 05:57 PM
Senior Member
 
CrowsSynthetics's Avatar
 
Join Date: Dec 2008
Location: St Clair Mo
Posts: 1,052
Points: 30,359
Thanks: 229
Thanked 126 Times in 86 Posts
Garage
Send a message via Yahoo to CrowsSynthetics
Quote:
Originally Posted by big_stroker View Post
When i changed mine I used AMSOIL 75w140 and about 2 oz of friction modifier.

The reason I used 2 and not the recommended 4 is because that is what felt good to me.

I had problem with the limited slip not working so I changed the fluid and drove it. and added an oz of the stuff till it felt and drove good to me.

Amsoil does state the modifier may not be needed it is as needed your approach is a sound one I just added the 4oz just to keep from doing any damage.
Bill


2003 F250 FX4 SUPERCAB SPORT XLT 7.3 PSD
Amsoil 3000 5w 30 ,Amsoil EaAU Air Filter ,Amsoil Pre filter-EaPF13,
Amsoil Dual Remote By-pass BMK-16A, Amsoil ATF & Transfer case, Amsoil 75w-140 fluid front & rear end, Amsoil Antifreeze Fluid
Edge with Attitude, 4" Turbo Back Exhaust,
5" SS Tip
, Transmission Magnefine filter, Sportman Tonneau Cover & Bush Fender Flairs
Now in the stable a new Black 2009 Jetta Sedan TDI

CrowsSynthetics is offline  
post #6 of 8 (permalink) Old 09-24-2009, 07:32 PM
Resident GINGER
 
CFRO's Avatar
 
Join Date: Nov 2006
Location: Bozeman MT.
Posts: 775
Points: 21,052
Thanks: 163
Thanked 57 Times in 48 Posts
Garage
Send a message via MSN to CFRO
Quote:
Originally Posted by CrowsSynthetics View Post
That weight is a little light Ford is not recommending that weight any more and an friction modifier is needed. You need to know a little more about the rear end Go here we use all manufactures recommendations.
Bill
Bill, is that the link you really wanted to post? I didn't see anything about oil in there.

Just wondering.

08 Ranger Grabber Orange. XLT 4x4 5 Speed Manual Super cab. Sirius. Silvana 9007 and 9415's. Amsoil 0w30 (Mileage Maximizer). Dee Zee Powder Coated Tool Box (PEELING). Dual 3' Fire Sticks. Cobra 75 X.
94 F-350 CC LB 5 -Speed. 4.10's. MBRP. Single Mass. 265/75's on 16x8's. Uniden CB. 3' Firestick.

Single club # 61
CFRO is offline  
The Following User Says Thank You to CFRO For this addition to TDG:
CrowsSynthetics (09-26-2009)
post #7 of 8 (permalink) Old 09-24-2009, 07:49 PM
Senior Member
 
CrowsSynthetics's Avatar
 
Join Date: Dec 2008
Location: St Clair Mo
Posts: 1,052
Points: 30,359
Thanks: 229
Thanked 126 Times in 86 Posts
Garage
Send a message via Yahoo to CrowsSynthetics
Quote:
Originally Posted by CFRO View Post
Bill, is that the link you really wanted to post? I didn't see anything about oil in there.

Just wondering.
Your are right that is not the right link here it is. I don't know what happened.
Thanks Bill


2003 F250 FX4 SUPERCAB SPORT XLT 7.3 PSD
Amsoil 3000 5w 30 ,Amsoil EaAU Air Filter ,Amsoil Pre filter-EaPF13,
Amsoil Dual Remote By-pass BMK-16A, Amsoil ATF & Transfer case, Amsoil 75w-140 fluid front & rear end, Amsoil Antifreeze Fluid
Edge with Attitude, 4" Turbo Back Exhaust,
5" SS Tip
, Transmission Magnefine filter, Sportman Tonneau Cover & Bush Fender Flairs
Now in the stable a new Black 2009 Jetta Sedan TDI

CrowsSynthetics is offline  
post #8 of 8 (permalink) Old 09-26-2009, 03:48 AM
Senior Member
 
4cstr's Avatar
 
Join Date: May 2005
Location: South Dakota
Posts: 8,265
Points: 90,084
Thanks: 245
Thanked 713 Times in 340 Posts
Images: 35
I also use the Amsoil in the front and rear diffs...and have been satisfied with it. I normally didn't run with the modifier in there, but the last camping trip I got a lot of rear end chatter loaded when turning corners. I have since added 4ozs of modifier...but haven't been camping to see if it solved the issue.

~Dave~

2012 F350 KR Dually, stock...bone stock.

early 99 PSD CC F250, DP Tuner F-5, Stealth Stage I, Casserly 160cc singles, Monsterbox Tranny, MBRP cool duals, ITP Regulated fuel system, Cobalts and Performax gauges, and way to much else to remember right now. **traded**

2004 Excursion Limited 6.0L, Dipricol gauges on the A-Pillar, Bilsteins and BFG's on the corners, lost EGR (not looking hard for it either), ARP studs, RCD Black Onyx head gaskets, MBRP 4" exhaust, (labor performed by Dan @ Midwest Transmission) **giggled when traded**

Quote:
I'm pretty good at drinkin beer -Billy Currington
4cstr is offline  
The Following User Says Thank You to 4cstr For this addition to TDG:
CrowsSynthetics (09-26-2009)
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Diesel Truck Forum - TheDieselGarage.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
rear diff question Scubba 5.9L Cummins (1998.5-2002) 3 05-15-2009 04:08 PM
99 F-250 rear diff Macktruckdriver Whats Been Sold 7 02-11-2009 12:00 AM
Rear Diff fordfanatic69 2003-2007 6.0L Power Stroke 23 01-04-2009 01:19 AM
rear diff 2tonePSD 1994-2003 7.3L Power Stroke 36 12-31-2008 03:40 AM
Rear Diff on '05 2wd juiced305diesel 2003-2007 6.0L Power Stroke 2 02-11-2008 02:33 PM

Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome