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Old 03-12-2003, 09:04 AM
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Post Ford Rear; 8, 8.8 or 9?

I did a quick search and have a little info... just looking for the last piece. I understand that if I have an 8" rear, I will be able to get a socket on the nut straight on and I can't with the 9"... how do I identify the 8.8"?

Better still, are there certain codes on the differential i should see that will tell me right away what I have? Currently the gears are 4.62 and I'm looking to come down to 3.55's.

Thx

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Old 03-12-2003, 02:03 PM
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If you can get a socket on it, its an 8 inch, if you cant, its a 9 inch.




8 and 9 inch rear ends have removable third members. 8.8s have integral carriers with a romovable cover on the back. So an 8.8 is like a chevy 10 bolt..dana 60...all those. It looks like a mixture between a square and a cirvle and has 10 cover bolts.



[ March 12, 2003: Message edited by: mustang66maniac ]</p>
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Old 03-12-2003, 02:04 PM
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At the bottom of this pageyou will see a picture of an 8.8.
A 9" looks nothing like this. The 8and 9" have removable center sections.
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Old 03-12-2003, 06:13 PM
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it also looks like the drive shaft is not centered as it connects wit the differential.... I can get the socket straight in.... I'm guesing it's an 8". I can see the old "Ford" in the oval engraved on the diff.

Kinda odd that the prev owner had 4.62 gears in a 3 speed stang with a 289 HiPo and an 8" rar, isn't it?
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Old 03-13-2003, 04:41 PM
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ok i have a 351 cleveland and i have a tremec t5 5 speed. i am putting the engine and tranny in an 86 f-150 reg cab short box the truck has an 8.8 inch rearend in it. i was wondering if you guys know if that rear end will hold up to the power. i am rebuilding the motor and it will have 12.5;1 compression so if you could help thatd be awesome. i hope it will hold up otherwise ill have to get a 9 inch
thnx guys
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Old 03-14-2003, 03:33 PM
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i would get some 31 spline axles...it outta hold up then
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Old 03-14-2003, 05:02 PM
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I think the f-150 8.8's came with 31 spline axles. I know the 8.8's in '92 and up explorers have 31 spline axles.
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Old 03-14-2003, 11:34 PM
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WOW, never heard of 4:62 gears in a 8". Just measure the size of the ring gear that's the measure used. 9" also has 2 diff wheel brg sizes. Large and small that corresond to the axles. small 28 spline and large 31.Look up on Google search " Ford rear end" lots of info. And ID's.
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