7.5 to 8.8 - Ranger-Forums - The Ultimate Ford Ranger Resource


Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

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Old 07-06-2010
braincandie's Avatar
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7.5 to 8.8

im reading alot that changing from the 7.5 to the 8.8 will make a difference in power? is this true. if so how much am i looking at spending to do this job, my truck is a 2003 supercab 3.0 im assuming it has the 7.5 in it too. ideas and advice?
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Old 07-06-2010
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Changing axles will not give you more power, power comes from the engine.
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Old 07-06-2010
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u got a 7.5 probaly with a 3.73 gearing, upgrade to a 8.8 4.10 gears its a cheaper axle to buy gears for and its a stronger axle. i just did the swap not to long ago, it was a breeze
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Old 07-06-2010
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so whats the real point of changing to a 8.8 then? do both tires pull?
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Old 07-06-2010
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u might be lucky and find a limited slip, i got an 8.8 open with 3.55s, switched to 4.10s and it locks possie all the time
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Old 07-06-2010
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8.8 is a stronger axle, it can handle more power
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Old 07-06-2010
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well if i understand my 3.0 correctly i dont think ill ever need a bigger rear end
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Old 07-06-2010
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Quote:
Originally Posted by braincandie View Post
so whats the real point of changing to a 8.8 then? do both tires pull?
if its another ranger 8.8 not much unless its a level 2, explorer 8.8 is 1.5" wider track, disc brakes, and 31 splines on the axles.
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Old 07-06-2010
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Changing the gear ratio of your present rear end would give you more power; say going from 3.73 to 4.10. The downside of the lower gearing is that it makes the engine spin faster for any given road speed, which, of course, might cause your gas mileage to go in the toilet.

Changing the whole rear end from the 7.5 to the 8.8 wouldn't result in any more power. The bigger rear end is only meant to handle the power of a larger engine.
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Old 07-07-2010
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Its a supercab ranger. It SHOULD already have an 8.8 in the rear. If I am not mistaken, every ranger from 98 that was a super cab had an 8.8 in the rear.
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Old 07-07-2010
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im going to look at it tomorrow and see if i can find some numbers on it and get back to you all with them.
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