GEAR OIL?
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GEAR OIL?
I just bought a '66 f100 with a 352, 3 speed manual. Its been sittin for a few years so the first thing i'm gunna do is swap ut all the fluids. I'm just not sure what trans oil and gear oil for the rear end i should put in it. Anyone have anything they usually go with?
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From: Boulder Creek, Ca
Not an authority, changed transmission; T18 4speed, and rear axle with GL-5 gear oil with limited slip additive and later told the limited slip additive is corrosive for synchro gears. If understand correctly the GL (gear lubricant) has a rating from 1-5 and each has a specific characteristic for type of gears, additives, etc. I subsequently changed the trans oil to GL-4. Seem to recall a few weeks back a member posted a simular thread and a number of members recommended using a non additive gear oil. Anyhow, food for thought.
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From: Rossmoor at Seal Beach
The ford Service manual calls for 50 weight, plain old 50 weight. 80 or 90 weight will make shifting a bit more difficult, aka slower, but will cause no harm.. anything over 90 weight is too thick aka not viscous enough. You want to find a non detergent oil, as any additives can cause corrosion on the brass, and copper internals! Multi weight oils have a modifier to make them blend better, which is essentially a detergent aka emulsifier so avoid those... you definitely do not want any GL rated gear oils! Just get plain old 50 weight... It will take a bit of searching but you can find it!
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From: Rossmoor at Seal Beach
Read the label on the Pennzoil, you are looking for any additives, or high sulphur content... those are a no no! I just researched it, and it is made using a 5W30 weight non detergent motor oil, with additives and modifiers to make it act like a 50 weight. It is designed for transmissions that are all aluminum, and steel based , it was designed for the NV4500 series transmissions, it will give you very smooth shifting, but my fear is that the additives will cause premature wear of the brass and copper bushing aka bearings in the older Ford Transmissions.. It will probably perform just fine, but it may induce early trans failure.
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Went by Napa and no 50 wt available. The Pennzoil Syncromesh rear label reads: "it provides excellent oxidation stability, low temperature performance, synchronizer performance and is compatible with yellow metals such as bronze, brass and copper components found in manual transaxles and transmissions."
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From: Rossmoor at Seal Beach
Went by Napa and no 50 wt available. The Pennzoil Syncromesh rear label reads: "it provides excellent oxidation stability, low temperature performance, synchronizer performance and is compatible with yellow metals such as bronze, brass and copper components found in manual transaxles and transmissions."
That sounds fine then! it will be a little thinner in consistency than a 50 weight, but it should shift very well!
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