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If you look at car or truck blade suspension you will see that the second blade goes under the eyes of the first one. On a TT or 5th, the second ends at 3 inches from the eyes so on a bump the firsh blade bends inversely , right at the end of the secondwhich with time breaks it from metal fatigue. Ask your friends who broke the first blade and you will learn that it is always at this very point tha it breaks..` To correct and protect the underside of your RV, you just add a second blade long enough to reach under the eyes of the first.. I wo uld advise the same t hicness of the first or second blade . You keep the original second blade in place, generally the u bolts are long ;enough to accept another blade and the suspension is just a little stiffer. I took the springs off the 5th myself brought the 4 springs to a spring shop ,cost was 230. At the same time I installed a greasable(HD wet) suspension w. a rubber schockfor another 150. This HD susp. was ordered on the net from Dexter Suspension . who are manufacturers. Be very carefull when working under the RV. Have it jacked on wood blocks at 6 places at least because you may have to shake the springs and bolts a bit. and follow the instructions coming w. the HD susp. When removing or installing the spring holding bolts be carefull not to turn th;e bolts, just the nuts cause the bolts are inserted tight . You extract them witth a hammer and a piece of soft metal like brass to protect the threads.
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