Change Rearend

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Nov 14, 2004 | 09:49 PM

CharlieR

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Joined: Jan 2004

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From: DFW, TX

Change Rearend

81 F150 3 on the tree, 4.9L.

I am thinking about changing the rearend on my F150.
I didn't look that the number, yet. But it is not geared for the hiway. My engine is screaming at 65 mph.

I can wait until something comes up at the wreckin yard. But I am not sure if I can do this one. I really don't want to mess with the springs. The guys at work say there's just four bolts and that it's easy.

Also, what is a good choice for hiway and work, still hope to tow 3500#.

Thank you
Charlie

Nov 14, 2004 | 10:40 PM

1982fordf100

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Joined: Sep 2003

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From: SE, Michigan

Im guessing that you have a 9" rear end? If you have a 9 inch then you could just change out the center section to a different gear ratio. You might get a better reply to this in the Clutch, Transmission, Differential, Axle and Transfer Case forum. This is for the Inline Six.

Nov 17, 2004 | 11:27 PM

Phrogman46

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From: Chicago

I second the center secton swap if you have a 9" thats easy money brother. Even a cave man could do it.

Geico

Nov 21, 2004 | 06:56 PM

dlb04

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From: Lexington, KY

the center change out will work, but be sure that the splines are compatible. there are 28 spline and 32 spline, good luck.

Nov 21, 2004 | 06:58 PM

1982fordf100

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From: SE, Michigan

dlb04 I believe you meant to say that there are 28 and 31 spline axles. Prolly just typo.

Nov 23, 2004 | 08:28 PM

dlb04

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From: Lexington, KY

I stand corrected, I just remembered when I changed my 9'' I was going to change just the center-carrier and I found that the axles were different spline. had to swap the whole unit. also had to grind the tabs off of the yoke to make the u-joint fit. I know I could have changed the yokes out but that nut has a tremendous amount of torque on it, around 200ftlbs. I think, so I just ground off those little retainer tabs to see if it would work. that was over 2 years ago and haven't had any problems.