Refilling 4 speed trans oil is a pain
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Laughing Gas
Joined: Sep 2003
Posts: 1,072
Likes: 25
From: San Mateo, CA
Refilling 4 speed trans oil is a pain
Decided to change the oil in the 4 speed today, 1964 T98. Stuff that came out was black as coal and stank. Nasty.
After online research here and on other sites the Traveller All Mineral SAE90 Ford tractor transmission fluid from Tractor Supply seemed to be a good replacement. Threads here and elsewhere indicated GL-1 rated oil is safe for all the metals in these old transmissions. I know 50W engine oil was called for, but that's 1964 oil....not the stuff we have today.
Refilling that T98 was a pain. Next time I'm getting a pump of some kind. I managed to do it today by connecting tubing to a small funnel, pinching it off, filling the funnel with oil, lifting it up into place under the truck, sticking the tubing into the transmission, and letting it drain. One......funnel......at......a......time. Took forever, and oil was everywhere.
It sure shifts smoother. This '64 F-100 is growing on me, and will be a fun shop truck until the '56 is done.
After online research here and on other sites the Traveller All Mineral SAE90 Ford tractor transmission fluid from Tractor Supply seemed to be a good replacement. Threads here and elsewhere indicated GL-1 rated oil is safe for all the metals in these old transmissions. I know 50W engine oil was called for, but that's 1964 oil....not the stuff we have today.
Refilling that T98 was a pain. Next time I'm getting a pump of some kind. I managed to do it today by connecting tubing to a small funnel, pinching it off, filling the funnel with oil, lifting it up into place under the truck, sticking the tubing into the transmission, and letting it drain. One......funnel......at......a......time. Took forever, and oil was everywhere.
It sure shifts smoother. This '64 F-100 is growing on me, and will be a fun shop truck until the '56 is done.
Posting Guru
Joined: Apr 2013
Posts: 1,170
Likes: 2
From: Rimrock AZ
Decided to change the oil in the 4 speed today, 1964 T98. Stuff that came out was black as coal and stank. Nasty.
After online research here and on other sites the Traveller All Mineral SAE90 Ford tractor transmission fluid from Tractor Supply seemed to be a good replacement. Threads here and elsewhere indicated GL-1 rated oil is safe for all the metals in these old transmissions. I know 50W engine oil was called for, but that's 1964 oil....not the stuff we have today.
Refilling that T98 was a pain. Next time I'm getting a pump of some kind. I managed to do it today by connecting tubing to a small funnel, pinching it off, filling the funnel with oil, lifting it up into place under the truck, sticking the tubing into the transmission, and letting it drain. One......funnel......at......a......time. Took forever, and oil was everywhere.
It sure shifts smoother. This '64 F-100 is growing on me, and will be a fun shop truck until the '56 is done.
After online research here and on other sites the Traveller All Mineral SAE90 Ford tractor transmission fluid from Tractor Supply seemed to be a good replacement. Threads here and elsewhere indicated GL-1 rated oil is safe for all the metals in these old transmissions. I know 50W engine oil was called for, but that's 1964 oil....not the stuff we have today.
Refilling that T98 was a pain. Next time I'm getting a pump of some kind. I managed to do it today by connecting tubing to a small funnel, pinching it off, filling the funnel with oil, lifting it up into place under the truck, sticking the tubing into the transmission, and letting it drain. One......funnel......at......a......time. Took forever, and oil was everywhere.
It sure shifts smoother. This '64 F-100 is growing on me, and will be a fun shop truck until the '56 is done.
Cargo Master
Joined: Aug 2015
Posts: 2,075
Likes: 101
From: Marana, Arizona
I like to use the pumps but, have also just pulled the shift lever and poured it in from the top.
On my Tacoma automatic I bought a few feet of clear tubing that fit the fill hole snugly. I ran the hose up into the engine compartment, put a small funnel on it and poured in the fluid.
I have done it the hard way enough times to finally get creative and find a better way. The hard way sucks.
Glad you got it done.
On my Tacoma automatic I bought a few feet of clear tubing that fit the fill hole snugly. I ran the hose up into the engine compartment, put a small funnel on it and poured in the fluid.
I have done it the hard way enough times to finally get creative and find a better way. The hard way sucks.
Glad you got it done.
Hotshot
Joined: Oct 2009
Posts: 16,175
Likes: 4,782
From: Burbank, WA
Makes me laugh at myself for not thinking of it, either. Too bad I have the column shift. 
Cargo Master
Joined: Aug 2015
Posts: 2,075
Likes: 101
From: Marana, Arizona
I didn't think of column shift. Never had one. Takes me out of the genius category for not thinking of that.
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Logistics Pro
Joined: Sep 2014
Posts: 4,920
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From: Bothell & Silverdale, WA
I have a Tulsa PTO on my transmission that has a forward and reverse (big sucker). There is just enough room to remove the filler plug, let alone stick anything else in there, so I drilled and tapped the drain plug 1/4 NPT and added a ball valve and plug. Now I easily fill through the drain with the aforementioned Go-Jo pump.
Tuned
Joined: Mar 2010
Posts: 353
Likes: 0
I usually just unscrew the shift cap and top drain plug, pull the shifter out and pour it right in. Can lay right there on the seat if you want
Says about 3-4Qts or something but usually starts to drain out the upper plug sooner.
Says about 3-4Qts or something but usually starts to drain out the upper plug sooner.
Lead Driver
Joined: Jul 2011
Posts: 6,599
Likes: 34
From: Rockingham, VA
3-Speed _____ 2.75 pints = 1.375 quarts
3-Speed HD __ 6 pints = 3 quarts
4-Speed _____ 5 pints = 2.5 quarts
4-Speed SS __ 8 pints = 4 quarts
5-Speed _____ 10 pints = 5 quarts
Cargo Master
Joined: Aug 2014
Posts: 2,594
Likes: 72
From: North Central Arkansas
I have a 5 gallon bucket pump that I used to fill my T98. The fill is not in the best location. With a PTO, the PTO lever and hydraulic pump lever are in front of the fill plug, it is hard to get to. The bucket pump does make it a lot easier.
BTW, I read somewhere that motor oils do not have any additives that can attack yellow metals, so modern 50W motor oil should be fine in the transmission. I have an New Process 4 speed that has a tag on it stating to use 50W motor oil also.
Mark
BTW, I read somewhere that motor oils do not have any additives that can attack yellow metals, so modern 50W motor oil should be fine in the transmission. I have an New Process 4 speed that has a tag on it stating to use 50W motor oil also.
Mark
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