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Old 11-12-2017, 07:17 PM   #1
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To Block or Not To Block

Hi All,
I have looked all over the interweb and can't seem to find a solid answer. It seems 50/50. Is it a bad idea to to use 4-5" blocks on the rear axle temporally for a 6" suspension upgrade? It would be for about a year until I could save for a new set of springs. I know that axle wrap is a concern but how much? I tow 6000 lbs with a 5.4. The axle would have 4.56's on 35"s. Any recommendations are welcome.
Cheers
Darryl
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Old 11-12-2017, 07:39 PM   #2
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Personally I wouldn't.
Because if things broke you'd be spending more on towing and repairs then the springs.
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Old 11-13-2017, 11:13 AM   #3
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How about a shackle flip?


"Talk is cheap. Whiskey costs money."
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Old 11-13-2017, 11:46 AM   #4
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I'd be more wary of spending money and labor (or DIY time) on an interim state, than of 4" blocks.
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Old 11-13-2017, 12:02 PM   #5
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Quote:
Originally Posted by MadScience View Post
I'd be more wary of spending money and labor (or DIY time) on an interim state, than of 4" blocks.
+2

Additionally ---
A rear lift, especially with the extra chassis dynamics and load/torque forces experienced by the rear axle/springs while towing.....this doesn't seem like the place to do anything that's "only half-way to the proper solution" either. JHMO!



By the way --- just reading up about the shackle flip approach to suspension lifting. Seems like a lot of off-road/Jeep/rock-crawler guys really dig it! But I'm also reading some cautions about using it on a vehicle you tow with....not sure exactly what the force-diagrams would indicate, but you are indeed changing the rear shackle from acting as a tension structure to a compression structure.
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Old 11-13-2017, 09:48 PM   #6
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Not a completely compression structure as the tension portion of the forces would increase as the shackle passes vertical while the spring load increases.


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Old 11-13-2017, 09:59 PM   #7
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Ah! This is true.
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Old 11-13-2017, 10:53 PM   #8
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Thanks for the responses. It has confirmed what my gut was telling me. No blocks for me. New springs it will be.
Cheers
Darryl
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Old 11-14-2017, 07:32 AM   #9
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The atlas springs from Ujoint are less than half the price of Deaver springs. Get them.
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Old 11-15-2017, 10:23 AM   #10
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blocks aren't the ideal solution,but they work fine. i am using ones with loops for the u-bolts to pass though, so no chance of them coming loose.

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