How much fluid does a Muncie 4 speed hold?
The Muncie 4-speed transmission will take about three pints, or 1 1/2 quarts of oil. Replace the fill cap.
What is an API GL-5 fluid?
GL-5 Heavy Duty Gear Oil is an extreme pressure, multi-purpose, automotive gear lubricant. Excellent performance for differentials operating under high speed, low torque; and low speed, high torque conditions. It meets SAE, military and commercial specs.
Can I use 80W90 instead of SAE 80?
Yes it is the same… close enough anyway. SAE 90 gear oil is equivalent to 50wt engine oil (SAE 80 = 30wt), so you could always dump that in instead if you want.
Is GL5 OK for GL4?
No, the API GL5 rating does not supercede or cover the GL4 rating. It is important to follow the gearbox or diff manufacturers recommendations and use the correct GL rating.
Is 80W-90 the same as SAE 90?
SAE 80W-90 gear oils use mineral oil as a base, which means more frequent oil changes leading to increased maintenance time. SAE 75W-90 maintains a more consistent thickness, or viscosity, across a wide temperature range. It’s thicker when exposed to high heat and thinner under colder, wintry conditions than 80W-90.
What kind of lubricant do you use on a Muncie 4 speed?
This is why using a good conventional GL-4 lubricant is imperative. CRC Sta-Lube produces a SAE 85W90 GL-4 gear oil (SL24229) which is perfectly suited to all Muncie, Super T-10, and most T-10 4-speeds.
How much oil do you need to change a Muncie 4 speed transmission?
Using the oil-change pump, fill with oil. Make sure the transmission is level. The Muncie 4-speed transmission will take about three pints, or 1 1/2 quarts of oil. Replace the fill cap. Dispose of the old oil properly. Kara Bietz has been writing professionally since 1999.
Where do you change the oil on a Muncie?
The Muncie was typically used in performance engines. Changing the oil on these transmissions can be tricky, as the oil-fill port is on the side of the transmission. You will most likely need a hose to fill it, or you can purchase a simple plastic oil-change pump at an auto-parts store. Remove the drain plug.
When was the last time a Muncie 4 speed was made?
The Muncie 4-speed which was available on some GM produced cars, last saw production back in mid-1974 when the Watergate scandal was front page news. And a Super T-10 equipped new performance car last rolled off the assembly back in the early-1980s. This was long before the widespread use of synthetic lubricants.