Walmart and Tractor Supply have the lowest oil & trans fluid prices in my area..
Parts stores ,especially NAPA,rape you for ATF--like $6 a qt,when 12.99 buys a full gallon jug of dexron III at Walmart in their Tech 2000 brand..
Motor oil is $4-$6 a quart too..Walmart often has 5 qt. jugs on sale for around $10...
I bought a 5 qt. jug of Mobil 1 15W-50 synthetic for $22.95 a few months ago there for my John Deere lawn tractor transaxle..
Walmart sells Tech 2000 15W-40 for under $10 a gallon too,and I've used a lot of it with zero issues...
Weird thing is a supermarket I buy groceries at has a small automotive section,and they only have a limited selection of oil & fluids,but for $3 a quart for Citgo oil (dino),and ATF for $4 a qt,they are beating parts stores prices..W/W fluid is like $1.50 a gallon or less there too,coolant runs about $10 a gallon for full strength old green type too..
I've read about using tractor hydraulic/transmission fluid in older automatics without overdrive or solenoids like the TH350 and TH400 and most all the input seems to be positive--its drawbacks are its not dyed so its hard to see on a dipstick, and some transmissions like the thinner of two viscosity grades to flow well in frigid temps ,(some filters made of brass screen rather than paper are available work best with that fluid)
..supposedly it lowers the stall speed of the torque converter by 300 rpm and makes for firmer shifts,and racers who use it on drag strip runs say it stays cooler and does not break down like ATF ,it has higher film strength and higher heat resistance ..also being slightly higher viscosity,it increases line pressure some and makes the clutches grab ,not slip,and they'll last longer..(maybe it even leaks slower out of old leaky transmissions too!)..
Tractor Supply often sells this fluid in 5 gallon pails for less than $25..that much $$ buys only 2 gallons of dexron at Walmart,and it can be used in P/S and rear diffs also,the tractors its spec'd for uses one lube for "everything"..(except the engine,motor oil only for that!)..
