What oil to use in Ford LN600 4 speed?
08-20-2005, 12:50 PM
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What oil to use in Ford LN600 4 speed?
Hey guys, I have a Ford LN600 4 speed dump truck, like a F600 truck. I want to change the transmission oil and don't really know what to use for the best service.
I figured it had 80/90 gear oil or automatic fluid. It doesn't shift smooth when it gets hot, especially first to second or neutral to first, and it grinds a lot.
Would a fresh change to syntheic oil help my shifting?
Any help or suggestions would be great.
I figured it had 80/90 gear oil or automatic fluid. It doesn't shift smooth when it gets hot, especially first to second or neutral to first, and it grinds a lot.
Would a fresh change to syntheic oil help my shifting?
Any help or suggestions would be great.
08-21-2005, 07:20 PM
#2
I cant imagine a dump truck running ATF in the stick trans. Did you drain it and see and color indications? I would imagine 80/90 kinda thing but wouldent stake my bad reputation on it. 
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