rear diff broke?
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3rd Gear
Joined: Aug 2009
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rear diff broke?
Guys
Havent been on here in more than a long time. Son has a 2011 f150 lariat with the 6.2l with the #7700 tow pkg. axel is noted as “b6” which is 3.73 limited slip….is it the 8.8 or the 9.75”
I ask because due to way to big tires 40” on 6 or 8” lift and tik tok mechanics not changing gear ratios…. The rear wheels locked up while at an intersection…. I am assuming that the whole differential went out. Thoughts on price wise swapping axel? Or just gearing inside diff? Thought? It got towed to a dealership which I don’t believe is the most cost effective of course but was close by on a Saturday hour away from home. SO I guess do you guys think it is just everything blown behind the differential plate? I have a hard time believing that the actual axel is a issue?
Havent been on here in more than a long time. Son has a 2011 f150 lariat with the 6.2l with the #7700 tow pkg. axel is noted as “b6” which is 3.73 limited slip….is it the 8.8 or the 9.75”
I ask because due to way to big tires 40” on 6 or 8” lift and tik tok mechanics not changing gear ratios…. The rear wheels locked up while at an intersection…. I am assuming that the whole differential went out. Thoughts on price wise swapping axel? Or just gearing inside diff? Thought? It got towed to a dealership which I don’t believe is the most cost effective of course but was close by on a Saturday hour away from home. SO I guess do you guys think it is just everything blown behind the differential plate? I have a hard time believing that the actual axel is a issue?
Last edited by rc70070; Aug 28, 2025 at 10:54 AM. Reason: added info
Hotshot
Joined: Jul 2005
Posts: 11,931
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dont think you will know for sure untill you spend 15 minutes taking off the rear cover and a quick look inside.... Even the dealer can do that and give you an ESTIMATE.
normal mode of failure would not be a total LOCK UP.
normal mode of failure would not be a total LOCK UP.
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