1998 chevy front differential oil seal plate part #
I am trying to find the part number or a location that I can buy the plate that the FRONT axle goes through. It has a seal in it and I am looking for the part number of the one on the Drivers side front. Please nothing about the real axle or differential cover.
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You are likely to get an oil 'mist' from a vent or breather tube -this is quite normal. The 'mist' cools around the breather and forms a small oily patch. on the axle casing.
Are you certain that the oil is coming from the vent tube and isn't due to a split in the metal casing or from the gasket/seal?
How much oil are you losing? The only other way you would lose oil is if excess pressure was building up inside the differential and to be honest, it's difficult to see how this would occur unless it has recently been over-filled with oil.
If there are drips of oil appearing on the ground underneath the axle/differential chances are that it's the cover seal or the pinion seal at fault. The pinion seal is where the driveshaft/propshaft attaches to the differential. The cover seal is the gasket between the metal cover where the filler plug is and the differential casing itself.
if independent suspension, I would be suspecting a failing bearing/bush inside the oil seal allowing the axle to move away from the oil seal lip
I f solid front axle , I would be checking the wheel bearings for failure and pulling the axle out of alignment with the oil seal in the axle housing
The Selectable Four Wheel Drive (S4WD) Front Axle consist of the following components:
• Differential Carrier Housing
• Differential Case Assembly
• Inner Axle Shaft
• Intermediate Shaft Bearing Assembly (located on the right side of the oil pan)
• Electric Motor Actuator
The front axle on Selectable Four Wheel Drive (S4WD) model vehicles uses a disconnect feature mounted on the right side of the oil pan in order to engage and disengage the front axle. When the driver engages the 4WD system, the Transfer Case Control Module sends a signal to the electric motor actuator to energize and extend the plunger inside. The extended plunger moves the clutch fork and clutch fork sleeve across from the clutch fork outer gear that is splined to the right side wheel drive shaft to the clutch fork inner gear that is splined to the inner axle shaft. The locking of the two gears allows the axle to operate in the same manner as a semi-floating rear axle. A propeller shaft connects the transfer case to the front axle. The differential carrier assembly uses a conventional ring and pinion gear set to transmit the driving force of the engine to the wheels. The open differential allows the wheels to turn at different rates of speed while the axle continues to transmit the driving force. This prevents tire scuffing when going around corners and premature wear on internal axle parts. The ring and pinion set and the differential are contained within the carrier. The axle identification number is located on top of the differential carrier assembly or on a label on the bottom of the right half of differential carrier assembly. The wheel drive shafts are completely flexible assemblies consisting of inner and outer constant velocity CV joints protected by thermoplastic boots and connected by a wheel drive shaft.
You will need to remove the rear diff cover. There is a small bolt that secures the pin that the spider gears ride on. remove this bolt, and then remove the pin(you might call it a shaft). Remove the caliper and rotor from the side you are replacing, and push the axle in. Inside the differential, you will see what we call a c-clip on the end of the axle shaft you just pushed in. Sometimes this clip if it is in the right position, will fall out on it's own. If not, slide it off, and go pull the axle out. Now you can pry out the seal and replace it. There will be a pipe plug with a square recess on the front side of the differential. You can put a 3/8 drive ratchet in the recess and unscrew it. This is the fill plug. You fill the rear end untill it runs back out of this hole. It will be located about half-way up from the bottom of the differential housing.
The transfer case uses two types of oil one is automatic fluid the front part of differential takes gear oil 85/120 wt. both differentials I would use synthetic oil and would run 85/120 however if the rig has been well used you might want to go with a higher weight oil oil so you don't get wheel seal leaks.
YOUR PROBLEM IS NOT STATED ON THE SITE. THERE ARE ONLY A FEW PLACES FOR THE DIFFERENTIAL TO LEAK FROM. THE FRONT PINION SEAL. THE COVER PLATE AT THE REAR IF SO EQUIPPED OR THE VENT AT THE TOP OF THE HOUSING USUALLY LOCATED ON OR NEAR ONE OF THE AXLE TUBES. OR, THE ENDS OF THE AXLE TUBES. OR, THE FILL PLUG. IF YOU CAN STATE YOUR COMPLETE PROBLEM I CAN BE A LITTLE MORE SPECIFIC.