bellagas Posted November 12, 2011 Share Posted November 12, 2011 As a new member, and familiar with the earlier recalls of Tacoma models with the same "rust through" problem with the rear differential, I am curious as to why Toyota would leave (virtually the same chassis) the 4Runner owners out in the cold! I just spent a small fortune replacing my rusted through housing and was just plain lucky that I caught it before the rear end seized. THIS SHOULD BE VIEWED AS A SAFETY PROBLEM AND REPORTED TO THE APPROPRIATE AUTHORITIES. I have already paid for this new housing and am not looking for reimbursement - nor do I expect any satisfaction from Toyota. Bellagas Quote Link to comment Share on other sites More sharing options...
BahamasTom Posted December 20, 2022 Share Posted December 20, 2022 I gots over 210,000 miles on my 2005 4runner rear end / differential. I changed the fluid with some Valvoline 80W 90 in July 2019 (143,000 miles). It was black and plenty old, but with new lube since then, I'm going fine IMO. I get the oil changed in driveway every 5000 miles - religiously. Differentials can last to over 500,000 miles on a 4runner IMO. I've done our 4runner differential fluid once. Outboard differentials and lower units on the other hand are garbage - even when built my Yamaha. Rear Differential Fluid Gear Oil Change - Toyota 4Runner - Bing video Quote Link to comment Share on other sites More sharing options...
camryskier Posted December 20, 2022 Share Posted December 20, 2022 11 hours ago, BahamasTom said: I gots over 210,000 miles on my 2005 4runner rear end / differential. I changed the fluid with some Valvoline 80W 90 in July 2019 (143,000 miles). It was black and plenty old, but with new lube since then, I'm going fine IMO. I get the oil changed in driveway every 5000 miles - religiously. Differentials can last to over 500,000 miles on a 4runner IMO. I've done our 4runner differential fluid once. Outboard differentials and lower units on the other hand are garbage - even when built my Yamaha. Rear Differential Fluid Gear Oil Change - Toyota 4Runner - Hum3D Hi BahamasTom! Tank you for sharing your experience! I have heard of several other 4Runner owners experiencing the rust problem, especially those in areas with harsh winter weather. It's definitely concerning and I agree that it should be treated as a safety issue. Has anyone had any luck getting Toyota to take responsibility for this issue and cover the repair costs? I would hate to have to pay for a costly repair out of my own pocket. 1 Quote Link to comment Share on other sites More sharing options...
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