Rear End

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Aug 26, 2013 | 11:59 AM

Tomkins2010

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Rear End

I have a 1990 F-150 XLT Lariat with a 5.0 HO. Can someone tell me what rear end would b in my truck. I'm pretty sure the ratio is 3.55 which is was too steep for 35 inch tires. I wanna change the ratio but I don't know what rear end I have.. Also any recommendations on a ratio would b appreciated. Also would it b in my best interest to just try and find another whole rear end assembly with the ratio I want or have someone rebuild mine. Thanks guys.

Aug 26, 2013 | 12:14 PM

vermillion95xl

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look at the door sticker it will tell you

Aug 26, 2013 | 12:15 PM

Conanski

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From: Ottawa, Ontario

It's a 31 spline 8.8 and you want 4.88 gears which you won't find in any stock axle.

Aug 26, 2013 | 12:24 PM

lew52

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X-2 4.88 gears

Aug 26, 2013 | 03:28 PM

Big_Red_Brute

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From: Virginia

If your truck has an Overdrive transmission you will be better with either 4.10's or 4.56's. And while you're at it, go ahead and have all the seals and bearings replaced. It won't cost that much more to do.

Aug 28, 2013 | 06:53 PM

Tomkins2010

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Ya it's got the AOD I have to go 70 and let completely off the gas and it will fall into over drive. If I hit the gas it instantly comes out.

Aug 28, 2013 | 07:14 PM

Big_Red_Brute

Tuned

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From: Virginia

Quote:

Originally Posted by Tomkins2010

Ya it's got the AOD I have to go 70 and let completely off the gas and it will fall into over drive. If I hit the gas it instantly comes out.

Yup, that's an AOD for ya! Lol

But gearing should help with that too.

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Aug 29, 2013 | 07:22 PM

Tomkins2010

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Lol ya it's kinda rediculous lol I get the rpms up too about 4 grand it starts to pull haha I was thinkin 4.56 but I've been hearing alot 4.88 is gonna b my best bet. Crappy thing is I won't find and axel with that in it ill just have to break down pay to have to put in.