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Old 05-17-2018, 04:09 PM   #1
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Adding Spacer Blocks to lift trailer

My 5th wheel sits a little low at the rear and I'm thinking of lifting it using some spacer blocks instead of welding a sub frame onto the axle (at great cost). I'm wondering if anyone has experience with this. I need to raise it 2 or 3 inches.

I can't lower my hitch anymore as it is on the lowest setting, but I do have room to move the pinbox up. There is about 8 inches between the top of the box and the unit.

My concern with going 2 inches is that if it isn't high enough, I only have about two inches to adjust at the front, but if I go 3 inches, I can lift my hitch if need. Although I'm not sure how high is recomended above the box.

Also, because the trailer is front high, there is 200 extra pounds on the rear axle, I'm thinking I might want it nose down any way. I'm thinking this because my fresh tank is above and possibly slightly behind my axles and I also occasionally tow a quad behind which adds weight to the rear.

Insight anyone?
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Old 05-17-2018, 04:21 PM   #2
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Definitely first start with moving your pinbox up- it's easy to do. A buddy did it for me (with minor involvement from me) at a campsite. You generally want 5-6" of clearance between the fifth wheel and the truck bed rails.

Then if you're still not level, start considering a lift kit.
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Old 05-17-2018, 04:38 PM   #3
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Raise the pinbox as high as possible to maintain the 5"-6" bed clearance. If that doesn't work, highly recommend the welded lift kit. They shouldn't be that expensive as it is only 4 pcs of 2" sq tubing 1/8" or 3/16" wall.
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Old 05-17-2018, 05:12 PM   #4
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Quote:
Originally Posted by OldCoot View Post
Raise the pinbox as high as possible to maintain the 5"-6" bed clearance. If that doesn't work, highly recommend the welded lift kit. They shouldn't be that expensive as it is only 4 pcs of 2" sq tubing 1/8" or 3/16" wall.
2100 vs 700
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Old 05-18-2018, 01:09 PM   #5
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Originally Posted by Palinduff View Post
2100 vs 700
Money isn't the only factor. Lift blocks increase side stress on the suspension, hangers and main frame. A sub frame adds cross bracing that can prevent the main frame rails from rolling. Also makes the frame stronger in the critical area between the axles.

If you add lift blocks, then get the spring hangers reinforced. Also check out Correct Track, it is supposed to lift the unit 1-2" and provide cross bracing that lift blocks won't do.
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Old 05-18-2018, 03:56 PM   #6
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I had a similiar issue with my new 5er. Installed a
Moride SRE 4000 with the upgrade wetbolt kit and changed the rear blocks on my truck from 4 inch to the 2 inch. The SRE 4000 kit includes a cross brace between the center hangers. The SRE 4000 raised the 5er 1 inch or so which gave me a total of 3 inches to level the RV.
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Old 05-19-2018, 12:06 AM   #7
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If you want to raise up the camper without altering the rig just install larger tires and rims that would be the safest way to gain several inches of height …..
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Old 05-19-2018, 09:09 AM   #8
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I've used lift blocks all but one RV I've owned without issues.
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