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EFV-8 Club Forum / General Ford Discussion / Correct Trans &Rear Lube

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Discussion Topic: Correct Trans &Rear Lube -- page: 1 2

sunflower

04-04-2011 @ 5:12 AM

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Hi , I started a new thread my question was never answered on the old thread.I been useing straight 140wt. mineral oil in my trans and rear is that acceptable? Thanks S.

40 Coupe

04-04-2011 @ 6:41 AM

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140W should be good, look for it to be marked EP for extreme pressure.

dansford

04-04-2011 @ 9:13 AM

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Hi, the gear oil is not marked EP does that make a differance? all it has is high quality 140wt straight mineral oil non detergent. Thanks again

supereal

04-04-2011 @ 10:31 AM

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If it is marked "gear oil", it almost certainly has the high pressure additive.

40 Coupe

04-05-2011 @ 4:11 AM

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Dansford sounds like you have the wrong stuff! Most of the auto parts stores sell the correct stuff in several different weights such as 85W-90 or 85W-140. I buy name brand, and try to stay away from full synthetic, because it seems to seep out. One of the ones (there are seeveral other name brand Mfg.) is Valvoline, HIGH PERFORMANCE, 85W-140, "thermally stable extreme pressure gear lubricant", P/N VV825

dfoote

04-05-2011 @ 1:17 PM

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This is my first post since joining the Club. I will soon be replacing both fluids in my recently acquired 39. From the research I have done and previous experience I don't believe you want to use GL5 gear lube in the transmission due to the high sulfur content which will attack the brass syncro rings. I haven't located 85W140 GL4 yet. Stalube used to make it and I believe Lucas did also. Lucas's chemist recommends mixing their Oil Stabilizer with the 85W140 GL5 to reduce the sulfur content. Anyone know of a manufacturer for 85W140 GL4 ?

supereal

04-05-2011 @ 2:43 PM

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We have used the readily available 80W-90 or 140 oils for years with no problems. At one time, 600W oil was recommended, and it is high sulfur, and will attack components. Ford used it in the Model A days because it was the only thing that wouldn't leak right back out. It is an asphalt-based solution unfit for common use.

deluxe40

04-05-2011 @ 7:51 PM

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Supereal's comment might explain why I have not been able to get the rear end to stop leaking in my early '32 (round flange at torque tube like the Model A). It leaked when I got the car in '86. It leaked after an experienced Ford mechanic installed the 3.54 gears and it still leaks after another experienced Ford mechanic replaced a suspicious axle housing. I guess I'l just stick with the drip pan and frequent refills.

supereal

04-06-2011 @ 10:25 AM

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One reason for leaks at the rear end is that the transmission leaks oil down the torque tube, overfilling the rear end. Try to keep the oil level just below the filler hole on the rear end. 140 weight oil will also help. Years ago, the cry of the Ford owners was "If it ain't leakin', it needs fixin'". That is why the garage floor in most old car guys garages have several layers of cardboard on the floor.

51f1

04-06-2011 @ 10:41 AM

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75W-140 is always available at Walmart.

Richard

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