replace 8.8 with a 9 inch

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Feb 26, 2003 | 11:56 AM

89 f150 4x4

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From: oak harbor

replace 8.8 with a 9 inch

i want to replace my 8.8 in my truck with a 9 inch out of a 76 lincoln. I found a 9 inch with disc brakes out of a 76 lincoln. The axle is a few states away and the guy does not know a whole lot about it. I was just woundering how strong it would be, what the width of the axel is, how many splines, and would it install with few mods into my 89 f-150?

Feb 26, 2003 | 01:12 PM

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From: Floyd, Va

replace 8.8 with a 9 inch

Here is a link on ford rear ends. It tells widths of years and models.

http://hiqties.hypermart.net/9inch.html#housing

Doesnt look like it gives the width for your cars rear, but it may help you to find something that will work.

Tony Warren
Nebraska

Feb 26, 2003 | 02:36 PM

89 f150 4x4

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From: oak harbor

replace 8.8 with a 9 inch

tony thanks for the website, hopefully i'll figure out a way to make the 9 inch work. I noticed on the web site you gave me that a 9 inch came with a 2.75 gear ratio, and the dana 44 in the front of my truck uses a 2.73, is finding a gear ratio size that matches the 2 axles going to be difficult?
Bill Edge
Oak Harbor, OH

Feb 26, 2003 | 02:57 PM

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From: Floyd, Va

replace 8.8 with a 9 inch

I believe the rule of thumb is 5 percent or less difference between the front and back.
Might want to check to make sure thats the gears you have in the front. From what i read at the top of the page, is that there werent any aftermarket gear sets available for the lincoln rears.
Now might also be a good time to change ratio if you are unsatisfied with the performance.

Tony Warren
Nebraska

Feb 26, 2003 | 03:04 PM

89 f150 4x4

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From: oak harbor

replace 8.8 with a 9 inch

About six months ago a pulled th I-6 out and put in a 351m which is now a 362ci, and a c-6 tranny. i'm going 3 more inches of lift and 35-12.50 any suggestions for a new gear ratio?

Feb 26, 2003 | 03:43 PM

FordPerf300

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From: CT

replace 8.8 with a 9 inch

i'd go 4.10gears, I wouldn't screw around with an axle off a lincoln, just pick up an axle from a 78/79 bronco, it bolts right in..

Feb 26, 2003 | 05:53 PM

MustangGT221

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From: Topsfield, MA

replace 8.8 with a 9 inch

The gears need to be within 1% of eachother, not 5%. Also, why bother? The 8.8 is a strong axle, just as strong as the 9". Also, the 9" doesn't have the ABS sensor that your 8.8 has. My vote is to just stay with the 8.8. They make full floater kits for them, and if you put a strong diff cover with bearing cap supports on there she'll be pretty dang strong. But even stock they are pretty strong, 400-450hp easy.