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axle 9in. rear

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Old Jul 13, 2009 | 04:32 PM
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axle 9in. rear

Are the axle's shafts , left and right the same length in a 79 f150 / 9 in. rear ? the reason I ask is shortly after I bought a used f150 something gave way in the rear towing my trailer . I pulled the axles out and found they were the same length and one was stripped about 3/8 of an inch off of the end . I thought one was supposed to be longer than the other ? thanks jim
 
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Old Jul 13, 2009 | 06:58 PM
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They are the same length.

The spiders must have let go and locked up in your differential. The Pins can be a problem too, were they broken?

Josh
 
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Old Jul 13, 2009 | 07:07 PM
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Is the rear end a limited slip unit?? I've seen one do exactly that after the owner replaced the seals and bearings and only got the axle in the first set of splines on the left side, thinking it was in he tightened the retaining bolts and this made the axle press on the second set of splines. It went 1000 miles towing a trailer before it let go and did the same damage you have. In a limited slip there are 2 sets of spline the axles passes through, so when reinstalling the axle it can take some time to get both splines lined up. It's a rare thing and I've only heard of this once but you never know.
 
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Old Jul 13, 2009 | 07:57 PM
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Axle

Originally Posted by duste
Is the rear end a limited slip unit?? I've seen one do exactly that after the owner replaced the seals and bearings and only got the axle in the first set of splines on the left side, thinking it was in he tightened the retaining bolts and this made the axle press on the second set of splines. It went 1000 miles towing a trailer before it let go and did the same damage you have. In a limited slip there are 2 sets of spline the axles passes through, so when reinstalling the axle it can take some time to get both splines lined up. It's a rare thing and I've only heard of this once but you never know.
Thanks guys , 1000 miles is about what i drove, I don't no if it's a limited slip , but I will find out soon . I do have another 9 in with the same ratio thats not limited slip , thats what I may use . well thanks again for the help . JIM
 
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