Thread: GL 5 Hypoid Gear Oil in Transmission
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Old September 3rd, 2013, 02:47 AM
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Default GL 5 Hypoid Gear Oil in Transmission
I have a transmission question that I was hoping you could advise on. A few years ago, I installed a 3 speed with overdrive transmission in my truck. I used Lucas Hypoid 85W/140W GL5 gear oil in my tranny when I installed it. Lately, I have been reading how such oils may damage "yellow metals" in the tranny due to high sulphur content. The tranny that I installed didn't have a drain plug, so I am a bit hesitant to go through changing the fluid unless I have created a real problem for my synchros. No problems with shifting or performance with the gear oil, but I am a bit concerned that I could be harming it through this choice. Have you seen this discussion and do you have any advice?

Thanks for your help.
Regards,
Steve
New Orleans
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