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08-16-2025, 05:11 PM
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#1 |
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Registered User
Join Date: Oct 2013
Location: Shelbyville, IL
Posts: 128
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U bolts for trailing arms.
My ubolts are 5/8" diameter. When I see the lowering block kits, it looks like they are only 7/16 or 1/2". Is that strong enough?
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1948 Chevy 1/2T 1964 Chevy 1/2T stepside short bed 1939 Pontiac coupe Street Rod 2005 GMC 1/2T short bed |
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08-16-2025, 05:39 PM
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#2 |
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Registered User
Join Date: Feb 2012
Location: Beautiful BC, Canada, eh?!
Posts: 2,389
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Re: U bolts for trailing arms.
You are only using one bolt per trailing arm - stick with the 5/8".
I had a local 4x4 shop bend up a pair in the length I wanted for my '61.
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1961 Apache: "Grabber Orange" Shortboxed, pancake, step-notch, air-ride, turbo, LS 1977 Silverado: Shortboxed & dropped, potato-potato V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag Lotus Super 7 Replica: Scratch-built street-legal rollerskate |
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08-18-2025, 01:49 PM
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#3 |
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Registered User
Join Date: Nov 2011
Location: Omaha, Nebraska
Posts: 576
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Re: U bolts for trailing arms.
Speedway has various length u-bots for 3" axle tubes. I just found the length I needed after installing 2" lowering blocks made out of thick walled square tubing from an old weight set based on a write up in the FAQ section by the TX Firefighter. I believe the u-bolts I got were 3/4. I would say 5/8 should be fine, but I wouldn't go any smaller personally.
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Travis' Tribute Truck - 65 C10 Frame Up Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=495073 |
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08-18-2025, 01:52 PM
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#4 |
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Senior Member
 
Join Date: Dec 2009
Location: TN.
Posts: 9,870
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Re: U bolts for trailing arms.
There is also this place in the link below .
Link: https://uboltstore.com/?msclkid=9416...16bc510efa36f1
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________________________________________________________________________________________ ____________________________________________ The early bird gets the worm, But the second mouse gets the cheese 85 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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