Question about 1991 Toyota 4Runner
G'Day Just brought a 91 4runner to find there's a whining noise when driving that seems to be coming from the rear diff. Old man reckons could just be low on oil. is there a way to check and refil oil in rear diff if neccisary. Or any other suggestions on what the prob is? Thanks :)
Give the old man a pat on the back! There is an oil plug on the rear differential. On a level surface, remove the plug; if oil starts to flow out, the fluid is full. If no oil flows, carefully put your finger in the hole and feel for the oil level. Your finger should go no lower than the first knuckle before you feel oil. If it goes further, you are low on oil and should either fill it up or better yet replace it. Rear axle oil doesn't get replaced nearly often enough in most vehicles and since your truck is 18 years old, would be a bad idea to have it changed. Best of luck.
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Posted on Jan 02, 2017
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