Dana fluid change

[Ralph Edward]

My owners manual states that may truck comes from the factory with 90w gear oil. It also states a GL-5 synthetic can be used, but did not state the weight. HELP!

 

[TowPro]

I just looked up the very same thing last night! I found the answer in the towing section. They say that if you tow a lot, they recomend using 75W-140 Synthetic with mopar number $$$1234$$$ (I have a dana 80HB, your findings may be different)

Originally posted by Ralph Edward:
My owners manual states that may truck comes from the factory with 90w gear oil. It also states a GL-5 synthetic can be used, but did not state the weight. HELP!

[This message has been edited by TowPro (edited 02-27-2001). ]

 

[Pete Peterson]

The synthetic is the way to go. Mopar is $19. 00 a quart and you can get Amsoil 75/140 series 2000 for about $12. 00 a quart.
either way the rear end will like the oil. Pete

 

[Sky]

Hmmmm,

Well I changed out to Amsiol and I am getting a slight shudder when i pull a load and turn. I also added the DC additive so im not sure whats going on. What level of fluid should i have? How do you check it?

Sky

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2001 QuadCab,SWB,Auto, 4X4,4" Flowmaster Exhaust, Bosch 275 Injectors, K&N, 33" BFG AT'S... ... .....

 

[Pete Peterson]

Sky, if you have the stock diff. cover then you fill it to within a 1/2 to 1/4 inch below the hole. With the Amsoil you may or may not need the modifier. If you need it then after you put it in go out and do 8 of 9 figure eights to get the modifier into the clutches. Sometimes and I repeat sometimes you will need to put in a second bottle. Pete

 

[Sky]

Ok, ill try that but really I had it done like 5k miles ago so it should be all worked in. Im gonna check the level and add some more additve i guess. If that dont work I guess off the the dealer #ad
hate them touching my truck. But I have put on 23k since August to I need to get it checked out before warranty is up i guess. Not to mention my sqeekee creekee steering colum.

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2001 QuadCab,SWB,Auto, 4X4,4" Flowmaster Exhaust, Bosch 275 Injectors, K&N, 33" BFG AT'S... ... .....

 

[Cooker]

You may want to look at this thread as to how much oil to put in the rearend. At least fill it unitl it starts coming back out the fill hole (on level ground).
https://www.turbodieselregister.com/ubb//Forum17/HTML/001529.html

Synthetic is the way to go. 75w90 if you don't tow much, 75w140 if you tow any substantial weight. IMO the 75w140 is the way to go reguardless of your how much or how often you tow.