We had a problem where our front jacks sank down while driving, we made it home, got so bad eventually that they wouldn't even retract.
It ended up being the seals on the suction side of the rams. The seals that leaked hold the hyd suction in the ram to hold up the jacks after the pump is off. When they leak, there is no fluid leaking out, just internal leak.
Dealer replaced the rams with the new units used on the 06. (ours was an early 05 came with smaller rams)
Not sure, maybe the Select has the previous model type rams? They did use a few things on the Select that were not same as MS had as far as running gear. Check with Lippert and DT to see if you do have the earlier std rams, and if so I would suggest getting them ordered to replace (under warranty) Even if they are the newer ones, they use the same process. Once these seals start to leak, they may just let go and leave you in my situation.
Good luck and keep a very good eye on them while towing! I drilled a hole and put a bolt in to hold them up till I got them replaced.
Cheers,
Bill
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