Replacing 4" block with 5.5"... - - Home of Canadian Ford Truck Enthusiasts
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post #1 of 3 (permalink) Old 03-17-2012, 02:52 PM Thread Starter
Join Date: Nov 2011
Location: Peterborough, ON
Posts: 30
Replacing 4" block with 5.5"...

I am about to attempt replacing the rear blocks on my truck. Currently they are 4" from the Pro Comp kit, I am putting in the Pro Comp 5.5". What's the best way to do this?

After loosening the u-bolt nuts....

Support the frame, unbolt lower shock and lower axle?


try to jack under the leaf spring enough to slide the new block in?
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post #2 of 3 (permalink) Old 03-17-2012, 07:26 PM
Join Date: May 2008
Location: Oakville, ON
Posts: 234
First you should have new ubolts. It's not a good idea to reuse them as they have stretched from the initial torquing. Make sure they are long enough for the new blocks. You can get new ones from any spring shop for $10 bucks a piece.

Support frame, support rear axle, loosen ubolts, undo lower shock mounts, undo any clamps for brake lines/cables, lower rear axle, remove old ones, slide in new ones, put in new ubolts.

2001 F350 CC SWB 6spd....currently getting a complete 'makeover'. Stay tuned.
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post #3 of 3 (permalink) Old 03-18-2012, 03:56 AM Thread Starter
Join Date: Nov 2011
Location: Peterborough, ON
Posts: 30
Good advice. Thanks.
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