Rear spring blocks

[laserjock]

So one of the things I found is that the rear leaf spring blocks I used are causing me a problem. I have a driveline vibration that gets worse when pulling hard. If you get back and look at the drive shaft and pinion, they are almost straight right now with no load. Throw in a little axle wrap and now the angle is backwards to what it should be. So I'm looking for replacement blocks with no taper to them.

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As you can see, this block has a taper probably to correct the driveline angle on the super duty it was intended to lift.

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These are the 250, 350, and superduty blocks together. I guess I need a stock style 350 block to correct the driveline angle.

What are you guys using as replacements? These were messed up because someone ran them with the u-bolts loose.

Thanks.

 

[morgankshaw]

I met a guy who said you can do a shackle flip and lose the blocks.


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[no mufflers]

I would go to a junk yard to see if you can find a decent set.

 

[Thewespaul]

Maybe f250 blocks? That would lower the rear a bit

 

[F350camper]

Is it possible to swap left for right causing them to shim the other way?

 

[laserjock]

Is it possible to swap left for right causing them to shim the other way?

Thought about that but I'd think it would cause the same issue in reverse. Finding a 4" flat bock is proving tougher than I thought. Now I remember why I gave up and bought these in the first place.

 

[F350camper]

put the tremec pinion angle app on your iphone and see whats what, that should help you figure out how many degrees of correction you need.

 

[laserjock]

I actually have a magnetic angle finder.

 

[F350camper]

ahh ok, me too!

 

[no mufflers]

I mean you could make your own. you could get some stainless square tube with thick wall, drill the holes you need and if you want could box the ends for extra strength.

 

[sjwelds]

I sold some guys some chunks of 1"X3" flat bar that they were going to stack and make their own blocks. Far as I know it's working for them.

 

[laserjock]

My 250 blocks were good. Just 2" short.

 

[ifrythings]

These guys make any size you want http://www.pmfsuspension.com/Ford-F-250350-Fabricated-Lift-Blocks_p_42.html

 

[no mufflers]

Yeah, I would have kept my eyes open at that yard in Kentucky for a set. If you can't find a set it really wouldn't take much to make a some.

 

[sjwelds]

Take the ones you have to a machine shop and get them milled flat.