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8.8" ratio Q's

1361 Views 9 Replies 3 Participants Last post by  wanderer4x4
8.8\" ratio Q\'s

really simple couple of tech question on the 8.8" diffs here.
1) what ratios are common on explorers, and which ratios relate to which models ( eg: do autos use, say 3.54's, manuals 4.10's, ang anything with 'towing' or 'off-road' packages 4.30's, etc)
2) does anyone know what the common ratios are on the Aerostar vans with 8.8" rear ends? ( and yes, I know that not all Aerostars use the 8.8")

I'm in the middle of doing an emergency axle swap under the Niva ( front end blew up, and I can no longer get spare parts - kinda limping along right now, hopign it doesn blow totally before I can get the new axle set up!!) Once I get the front end in, I'll be swapping an 8.8" under the back to match the new D30 front for wheel lug circle, and width. Any info on the ratios would be appreciated, especially crossover info on the vans, as Aerostars are common in the local you pull it yard, but Explorers can be hard to find.

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Re: 8.8\" ratio Q\'s

You can find Mustang/TownCar/CrownVic/GrandMarquis/Explorer/Expedition/new F-Series 8.8s with discs, but there's no good way to put them on the pre-97 1/2-ton axles.
Re: 8.8\" ratio Q\'s


The ones that fit inside 15" rims have the wrong lug spacing (5-on-5) and the wrong axle tube size, and there are at least 3 layouts for the 4 bolts that mount the brakes on the ends of the axle tubes.

The later ones that fit the F-150 8.8" axle tube won't fit inside a 15" rim and ALSO have the wrong lug spacing (the new metric layout). Some also have a different mounting pattern.

ALL of them use an internal drum e-brake that I don't like, and that's why the mounting can't be changed - it would eliminate the e-brake. Even if you did that, you'd have to go to 16" rims, which would mean redrilling your front hubs for the new spacing, and every set of front rotors you bought would have to be drilled, also.

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