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Old 04-27-2013, 02:31 PM   #1
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Monroe shock retrofit

Mulling over the idea of adding Monroe RV shocks due to too much rear end bounce. There's lots of the shocks themselves available at various places - the easy part.

The lower mounting brackets #RB511 are not available from many vendors plus they seem expensive for what they are. Anyone know of a good source at a reasonable price for these?

The upper brackets, #RB513 are NLA. Why would this be? Legal/Liability issues with drilling holes in the frame or welding the bracket to the frame?

What are other folks doing for the upper bracket? I am worried about doing something to the frame that may contribute to or cause frame damage. There's been so many cracks in Lippert frames and other problems with their frames that have been reported on the internet. Is their a recommended method of affixing the upper brackets? Weld or bolt a bracket? Re-inforcement recommendations? Any links to pics and info?

Perhaps it might even be best to take our TT to a frame shop and get them to do it. The Lippert frames don't seem to be much better than sheet metal pieces welded together....
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Old 04-27-2013, 02:35 PM   #2
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Mulling over the idea of adding Monroe RV shocks due to too much rear end bounce. There's lots of the shocks themselves available at various places - the easy part.

The lower mounting brackets #RB511 are not available from many vendors plus they seem expensive for what they are. Anyone know of a good source at a reasonable price for these?

The upper brackets, #RB513 are NLA. Why would this be? Legal/Liability issues with drilling holes in the frame or welding the bracket to the frame?

What are other folks doing for the upper bracket? I am worried about doing something to the frame that may contribute to or cause frame damage. There's been so many cracks in Lippert frames and other problems with their frames that have been reported on the internet. Is their a recommended method of affixing the upper brackets? Weld or bolt a bracket? Re-inforcement recommendations? Any links to pics and info?

Perhaps it might even be best to take our TT to a frame shop and get them to do it. The Lippert frames don't seem to be much better than sheet metal pieces welded together....
Forest River Forums - OldCoot's Album: Adding shock absorbers to Alko torsion axles
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Old 04-27-2013, 02:48 PM   #3
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Is that a box frame or I-beam? Can't quite tell, but it looks like you did it all by bolting on only? I think I like the idea of bolting better than welding in case the heat causes metal fatigue or makes the steel too brittle or something like that. Wouldn't want to give Lippert an excuse to ever deny coverage if something failed.
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Old 04-27-2013, 02:52 PM   #4
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Is that a box frame or I-beam? Can't quite tell, but it looks like you did it all by bolting on only? I think I like the idea of bolting better than welding in case the heat causes metal fatigue or makes the steel too brittle or something like that. Wouldn't want to give Lippert an excuse to ever deny coverage if something failed.
It's I beam, but I never touched the frame and it's all bolted.
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Old 04-27-2013, 09:57 PM   #5
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FYI all the Monroe is is discontinued. I spent quite alot of time trying to track those part numbers down and even emailed Monroe and was told they are all discontnued and are being removed from the site. OldCoot has a good setup and I am going to give his a go later this summer on a travel trailer.
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Old 04-28-2013, 03:00 AM   #6
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Sask, that would explain the difficulty in finding the Monroe parts. I have not seen another manufacturer of similar components. I wonder if there is one with shocks and brackets for an RV retrofit?

Coot, thx for the great pics. I have never seen torsion suspension before and it took me a bit to see that there is an extra steel member under your I-beam to supports the axles. Obviously lots of thought went into what you did. I am thinking perhaps I could bolt an 1/8" plate onto the I-beam that is say 12" long x 6" high (approx.) with an appropriate bracket with gusset welded to the plate before it's bolted on. Then there would be no welding to the I-beam.

I have to wonder if Lippert or anyone else has a specification for allowable hole sizes, location and spacing in the I-beam? The frame near/around the axles is an obvious high stress point and I am worried about potentially weakening anything by drilling. The internet is full of stories and tragedies about cracked Lippert frames...

I noticed the Sensatrac shocks. Anything particular about these like diameter or dampening strength? If I can still easily get the Monroe trailer retrofit shocks, think I'll just go with those. But then if at any point in the future they had to be replaced, could they be matched up?
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