Leeann wrote:
DRTDEVL wrote:
Finally, has anyone figured out how to diagnose and repair the cruise control on these? Mine has never worked since I owned it. The little vacuum diaphragm seems to hold vacuum and the supply is there. Nothing happens when I activate the cruise... no clicks, ticks, hums, or anything else mechanical, and the speed obviously falls to idle when activated going down the road. -or- would I be better off trying to retrofit aftermarket cruise control?
DRTDEVL wrote:
In the next year, I hope to source a built 47RH transmission with adjustable pressure and vacuum switches to automatically control OD and TCC Lock. Hopefully this will bring me up from the dismal 5.5 mpg I get towing the pictured trailer with one Harley inside at 60 and allow me to cruise at 65-70 without the engine screaming for mercy at those RPMs.
I doubt you want an OD unit on one of these RVs, especially towing the trailer. The old mantra - tow in drive, keep your trans alive - is still true today. We had a 47RH in our '90 Dodge B250 with a 360, and the OD unit was a common failure point. And the failure on ours, too - my husband forgot the mantra and used the OD while towing our raceboat (open) trailer, which weighs a lot less than your enclosed trailer. If you could find a Gear Vendor overdrive unit, which bolts onto the 727, you'd be better off. They're built for heavy-duty use.
Thank you for the diagram. I'll follow that and see what I come up with.
As for the OD trans, I have been in talks with a company nearby who had built billet 47RH transmissions that can tow *HEAVY* in OD and stand up to the stress. Warranty will cover if the trans can't take it, too. The stock 47RH sucked, and yeah, they would burn up if towing in OD. Technological advances, however, have been able to cure most of the issues and allow these transmissions to stand up to incredible power being tossed their way from the diesel ricer crowd that likes to blow smoke and push 600+ hp and 1000+ tq through them. I'll be sticking to the stock 440-1 with roughly 300-350 hp and up to 450 tq.
EDIT: I forgot to add that my trailer with a Harley inside likely weighs only 3,000 lbs, and my 20.5 RV likely only weighs 7500 lbs with the tanks full. This would be roughly the same as your B250 pulling a race boat with the stock transmission, as that boat on trailer likely weighed in around 5,000 with trailer, and the van likely weighed about 5,500 lbs. This puts the pair in the same neighborhood.
