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Old 01-03-2014, 03:32 PM
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Rear Block Swap

Yes I've searched, trying to find out what I've got, finally was able to score some f350 blocks from the junk yard from an 08, my first question is are there any major differences between the rear axle of the 08 350 and 04 250 (I.e. axle diameter block width etc.) that I need to be aware of prior to tearing everything apart? Have the u-bolts from it and they just seem bigger......not trying to reuse them but more of a reference. Thanks ahead of time and sorry for another thread regarding a common general question.
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Old 01-03-2014, 08:21 PM
Vintage Nakamichi Powered
 

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I don't know the differences except that the 350 is 2" taller.
Nothing wrong reusing ubolts as long as the threads sure good and rust isn't a issue.
Make sure spring pins are same for axle. If it fits use it
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Old 01-04-2014, 03:52 AM
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Ya I know that much. Just trying to find out any major differences between 04-08 rear axles
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Old 01-04-2014, 04:08 AM
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I think the blocks are different between cab/bed configurations. Something about the block being tapered or flat. So a CCLB could be flat while a EXSB would be tapered something like that. As long as the truck you pulled them off of is the same cab/bed as yours you should be fine. The different blocks are due to the driveshaft alignment and vibrations.
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Old 01-04-2014, 04:11 AM
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Yes i know all of this, they are flat blocks, I'm really not trying to find out anything regarding the blocks I'm trying to find out if the axle has changed at all from 2004 to 2008. More or less a curiosity thing.
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Old 01-04-2014, 04:26 AM
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Nope, No change that I know of between the years.
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Old 01-04-2014, 04:52 AM
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Send a message via Yahoo to Dave
Exterior of the axle hasnt changed. The only changes are the axleshafts and number of splines
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Old 01-04-2014, 04:55 AM
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Quote:
Originally Posted by Dave View Post
Exterior of the axle hasnt changed. The only changes are the axleshafts and number of splines
thank you, so when a company asks for exterior diameter of the axle its still the same regardless of year for the most part, 99+
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Old 01-04-2014, 05:01 AM
Almostdunfukinwidit


 

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Quote:
Originally Posted by xp1ik05 View Post
thank you, so when a company asks for exterior diameter of the axle its still the same regardless of year for the most part, 99+
3.625 is your axle diameter
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Old 01-04-2014, 04:38 PM
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ok last question, is the 08 axle the same diameter? i was unable to track down some new u-bolts today like i had planned and want to get these blocks in tomorrow, they fit over the axle but they just seem alittle bigger if that makes any sense
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