Dana 50 TTB Specs
Manufacturer | Dana Holding Corporation |
Applications | 1980 to 1997 Ford F-250, select 1980 to 1986 Ford F-350 |
Type | Semi floating front differential |
Ring Gear Diameter | 9.00" |
Pinion Shaft Diameter | 1.375" (1-3/8") |
Pinion Shaft Spline | 26 spline |
Axle Tube Diameter | N/A, twin-traction beam system |
Axle Shaft Diameter | 1.21" |
Axle Shaft Spline | 30 spline, 1.31" axle shaft diameter @ spline |
Max GAWR | 4,600 lbs |
Fluid Spec | SAE 80W-90 gear oil Recommend Amsoil 80W-90 Severe Gear full synthetic gear oil |
Fluid Capacity | ~ 2 qts; always add fluid to fill plug level |
Dana 50 TTB Oil Change Procedures
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• The Dana 50 TTB does not have a drain plug - fluid needs to be extracted through the fill hole using an extraction pump.
• Remove the fill plug from the front of the differential housing (square drive). Insert the tube of the extraction pump through the fill hole into the bottom of differential and extract all the old gear oil.
• Once the old fluid has been extracted, refill the differential with fresh fluid. Ford lists the capacity as 2 quarts - you simply need to fill it until fluid has reached the fill plug level. Once it begins to dribble out of the fill plug, the differential fluid level is full.
• Clean the fill plug before re-installation.
• We used a manual suction pump to remove the old fluid, and this nifty bottle pump for refilling the case. These are available at most auto part stores and attach to the top of standard oil bottles. If you are using the same pump for extracting and refilling, be sure to clean the pump in between procedures to avoid contamination.