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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Jan 2008 Posts: 4,964 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,964 | Denny, first of all synthetic and petroleum based lubricants don't mix. All of the service bulletins that came out about 20 years ago recommended making the switch at rebuild time. OEM has been using synthetic for about 20 years. Second, the 75W140 is a hypoid lubricant and not meant for transmissions. I don't like to recommend brands because I have sold lubricants all my life. But I don't like Citgo because the company is wholly owned by the Venezuela dictator Hugo Chavez. If you want to use synthetic in a transmission like I have been the last 20+ years, this is the stuff Mobil makes for manual transmissions. http://www.mobil.com/USA-English/Lu...vac_Synthetic_Transmission_Fluid_50.aspx | | |
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