Reply to "what oil to use in a zf please"

wasatchcatMember

Why not run Brad Penn GL-4? It works very well in a ZF and is what was specified from the manufacturer. If you want a synthetic, then Pennzoil makes a great GL-4 specific one, but you will need to buy a case and it is expensive. I switched to the Pennzoil synthetic because I live in a cold climate and it did improved the shifting when cold, but did not improve the shifting when hot over the Brad Penn gear oil.

Summit racing sells the Brad Penn GL-4 oil and can have to your door in a few days.

2/18/145:22 PM

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