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No it doesn't have a 9 inch rear... All though I really wish it did... It is a 8.8 inch ring gear and it is also an integral differential. Meaning that the only way to access the gears is to remove the rear cover. The 9 inch Ford rear was a bullet proof rear end. It has what they call a removable carrier and also you can just remove the pinion gear by itself. What made these rears so great was on the end of the pinion gear was a snout that slipped into a roller cage type bearing, so when under heavy excelaration the ring gear won't bend the pinion gear and break off destroying the whole rear end... This was a problem on all GM cars with a 10 bolt rears. The 12 bolt rears were a bit stronger but a lot of guys who drag raced their GM cars would put 9 inch Ford rears in them. Then a company called "Strange" bought the patten rights from Ford so they started using their 8.8 rears... I had to rebuild mine in my 89 Mark VII twice now and the 2nd time I put a 3.73 gear set in it and replaced the 3.27. If it was a 9 inch I'd still be driving it without ever taking it apart, only changing the gear oil in it every 25,000 to 50,000 depending on how much I was towing my camper... I've been using Mobil 1 Synthetic 75/140w since I bought.

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Q: Does the 86 Mark 7 have 9 inch rear end?
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