What is the oil plug on left rear axle for - Cars & Trucks

Low oil level in the axle, bad or contaminated oil in the axle, or a bad bearing in the axle. It is also possible that you have a brake issue on one side (easy to spot if you inspect the rear brakes).

you will have to dimantle rear hub withdraw driveshaft and replace seal oon axle drain axle oil first square drain plug in centre of axle hope this helps

I have confirmed the fill plug is located on the Differential cover (rear facing) Closer to the left about half way up. Although Summit after market Differential covers has a drain plug the OEM cover does not. You will need to suction the old fluid out then add the new fluid. From what I can see the fill plug is 13mm. Capacity is .7L. Used Volvo Rear Axle Fluid (API GL-5 Low friction part #1161329). Also I read that it requires one aluminum crush washer (same size as engine oil drain plug). I don't know about reusing the origional.

I supose you are talking about the rear axle? if so, unscrew the bolts of the rear axle's cover and let the oil flow out into a container. once it's empty, clean the cover and the surface on the axle where the cover goes on to, apply a seal onto the cover and put the cover back on and screw al of the bolts back into place and tighten them. you will find a rubber plug in the cover, take it out and fill the rear axle untill the liquid comes out of the plughole. Put the rubber plug in and you're done! Watch out if you got al limited slip differential, you will need to put an additive into the oil so you won't burn the clutches of you limited slip differential.

Where is the leak? Toward the middle or at the right or left sides near the rear wheels?

most axles fill plugs are located on the rear cover just fill until it starts coming out and your done. on some axles there will be a plug on the axle itself located on the fron side of the housing close to the driveline

Put rear tire's on jack stand's, remove left rear tire, brake caliper and bracket and slide off brake rotor, then remove rear end cover get a pan for fluid to drain into,there will be a set of gear's through the gear's on the right side of the ring gear there will be a pin about 13/4" in dim. and about 5" long at one of the end's there will be a small bolt that hold's that pin with an 8mm head going through it, remove that bolt,slide pin out, go over to axle push in (do not turn axle) go back under truck remove horse shoes clip at end of axle, then side axle out, install new axle and refill with gear oil some take a anti-slip additive.Goodluck

The rear diff. turns the rear wheels. It is located in the middle of the rear axle. It won't last long if you ignore it. May just need dearing's but if it is driven the cog wheels will grind to dust or drop off this can cause the rear axle to seize up and can be a danger because the back wheels will lock up. If you are going to fix it yourself let me know and I will be able to guide you through the process

the rear axle takes 85-140 gear oil if you have limited slip you have to also add a friction modifier to it. you have to fill it from the level check plug about halfway up either on the differential cover or on the front of the third member depending on the axle that you have

Axle Shaft Removal

1. Raise and support the vehicle. For additional information, refer to Section 100-02 .

1. Remove the wheel and tire assembly. For additional information, refer to Section 204-04 .

1. Remove the differential housing cover (4033).
   1. Loosen the bolts and drain the lubricant from the rear axle housing (4010).
   1. Remove the bolts.
   1. Remove the differential housing cover.

Remove the rear brake disc (2C026). For additional information, refer to Section 206-04 .

1. CAUTION: Turning the differential case (4204) or an axle shaft (4234) with the differential pinion shaft (4211) removed will cause the differential pinion gears (4215) to fall out of the assembly and damage the components.
   Remove the differential pinion shaft.
   1. Remove the differential pinion shaft lock bolt.
   1. Remove the differential pinion shaft.
2. CAUTION: Do not damage the rubber O-ring in the U-washer groove.
3. Remove the U-washer (4N237).
4. Push the axle shaft inboard.
5. Remove the U-washer.

Reinstall the differential pinion shaft.

1. Install the differential pinion shaft.
2. Install the differential pinion shaft lock bolt finger-tight.
3. CAUTION: Do not damage the wheel bearing oil seal (1177).
   Remove the axle shaft.

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Seal Removal

1. Remove the axle shaft (4334). For additional information, refer to Axle Shaft in this section.

1. CAUTION: Never remove the wheel bearing oil seal (1177) by itself. Always remove the rear wheel bearing (1225) and the inner wheel bearing oil seal at the same time.
   NOTE: If the wheel bearing oil seal is leaking, the axle housing vent may be plugged with foreign material.
   Using the special tools, remove the rear wheel bearing and wheel bearing oil seal together.

Installation

1. Lubricate the new rear wheel bearing.
   • For 4.0L SOHC and 4.0L EI with limited slip rear axles and 5.0L vehicles, use SAE 75W-140 High Performance Rear Axle Lubricant F1TZ-19580-B or equivalent meeting Ford specification WSL-M2C192-A.
   • For 4.0L SOHC and 4.0L EI with conventional rear axles, use SAE 80W-90 Premium Rear Axle Lubricant XY-80W90-QL or equivalent meeting Ford specification WSP-M2C197-A.

1. Using the special tools, install the rear wheel bearing.

1. Lubricate the lip of the new wheel bearing oil seal.
   • Use Premium Long-Life Grease XG-1-C or equivalent meeting Ford specification ESA-M1C75-B.

1. Using the special tools, install the wheel bearing oil seal.

1. Install the axle shaft. For additional information, refer to Axle Shaft in this section.