Re: Changing Rear Differential fluid SRT-6
Resurrecting old thread to talk about differential fluids.
The owner's manual says:
Only use synthetic SAE 75W-85 axle lubricant that meets MB 231.1. Reduced axle durability may result if an unapproved product is used.
The service manual says:
Use synthetic SAE 75W-85 axle lubricant that meets MB 231.1, such as Mopar 05126035AA. An SAE 80W90 GL-5/MIL-2015-E Synthetic Axle Lubricant may be substituted. Reduced axle durability may result if an unnaproved product is used.
The dealer wants over $35 per quart of the Mopar fluid. The local Benz dealer wants almost $39 per quart of its compliant liquid gold.
The only synthetic axle fluids I can find in my local auto parts stores are all 75W-90 or 75W-140. The Valvoline one meets the GL-5/MIL-2105-E, but it is 75W-90.
The only 80W-90 gear oils I can find are all non-synthetics.
Is searching for 80W-90 synthetic (to show that I complied with warranty requirements) a fools errand? Should I just buck up, or does someone know where I can get a suitable fluid in the US?
Last edited by Display_Name; Jun 2, 2008 at 06:21 AM.