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Old 09-10-2012, 08:06 PM   #15
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Quote:
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--Oil changes are a once a year item (~$300) as are fuel filters (~<$100)
--Hydraulic fluids don't have anything to to with the engine; they run things like the power steering and engine fan. The fluid and filters only have to be replaced every couple of years.
--Transmission filters are an every 3-4 year item; even if your Transynd fluid needs changing at the same time the cost should be only $400-600
--Coolant additives are NOT required if the coolant is a Cat or Cummins extended life coolant. For a Cat all that is required is an additive at the 3-year point.
--Air filter are also a once every several year item

Don't get scared away from a DP because of what people tell you about maintenance; do the research and make an informed decision.
I don't think anyone posted anything about trying to scare anybody. The OP asked what surprised them about a dp. As far as information on this forum is concerned I think Gary is one of if not THE most upfront,helpful and honest guys on here! JMO
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Old 09-10-2012, 08:49 PM   #16
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There's a little monitor that will tell you when the air filter is plugged.

Other than noise level and ride comfort, I think the biggest surprise for me was the fact it would stop? I have much more confidence in these brakes! And speaking of brakes, the exhaust brake is a godsend in the hills. Not something you are going to conquer completely on the first trip, but once you are acclimated to it, you'll have superior control over your speed on the downhill runs.
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Old 09-10-2012, 08:54 PM   #17
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I learned that there is no diesel to gas thread. I think very few make the switch. That should answer the question in anyone's mind. You never know, downsizing, some may want to. Once I get out there I may find my MH just doesn't get me where I want to go because of the size. I'm pretty sure we will be spending at least a month everywhere, so maybe all we need is a gasser. We never had one, our 12 year old 40 ft DP we got last year was our starter, and I still think our forever. We love it so much, it rides so well, it is so quite, and it feels as sturdy as a tank!
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Old 09-10-2012, 09:04 PM   #18
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gas to diesel

if you go up to the 28,000 lb. chassis and above. 1) your getting a million mile motor 2) lots more storage 3) lots more tire under you 4) bigger tanks 5) a rig that doesn't get pushed around as much 6) lots more power 7) better fuel milage 8) longer brake life (especialy if you spring for allisons trans retarder ( bring money ). and lots more.
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Old 09-10-2012, 09:09 PM   #19
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I have moved from a diesel (albeit an older FRED, not a DP). Decisian based primarily on maintenance and repair costs, ease of obtaining service, and capital cost. We stay in the coach more than travel.
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Old 09-10-2012, 09:11 PM   #20
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There's a little monitor that will tell you when the air filter is plugged. ...
Does that mean it is fine to run it right up to "plugged" or do you suggest that it would be normal to replace sooner, like say 80-90% plugged?
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Old 09-10-2012, 09:24 PM   #21
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  1. I went from gas to diesel in March of this year.
  2. I went from 6.5 MPG gas to 10.5 MPG diesel.
  3. Lots of cargo capacity. Slide out in storage bay.
  4. Semi's don't push the coach when passing.
  5. Super quiet while driving. No engine noise. DW and I can talk in normal voice while underway.
  6. Air ride is outstanding. a lot less body roll when driving in cross winds.
  7. Larger fresh water, gray and black tanks.
  8. Generator in front, bed in back. No noise when trying to sleep while boon-docking in hot weather.
  9. Much easier and faster to fuel and maneuver at truck stop diesel pumps.
  10. Allison Transmission
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Old 09-10-2012, 09:45 PM   #22
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Maintenence costs a little more. Fuel costs more per gallon.

After hearing and hearing and hearing about Allison truck transmissions for so many years I have to say that I am now a believer.
I just wish they had more gears as sometimes one is too low and the next is too high although the much wider torque band of the ISC with Banks makes a big difference too. I now use "economy" mode far more.
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Old 09-10-2012, 10:01 PM   #23
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Originally Posted by Sky_Boss View Post
There was a comment that the trany filter is replaced every 3-4 years...I would think that would be true for the fluid but the filter would be every year...especially with Transynd.

Also, the same was said about the air filter. That seems odd to me unless that means they can be cleaned in between and need replacement at about 3-4 years.

Thoughts?
HERE is the link to the Allison Service Tips on the Allison transmission used in RV's. If you have the TES-295 fluid and heavy duty filters you change the filters every 75,000 miles (or three years) and the fluid every 150,000 miles (or four years) whichever comes first.

If you have the Ecolite filter (most common) then you change it every two years. NEVER attempt to clean it as that can rupture the element leading to "dusting" of the engine and require a rebuild.
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Old 09-11-2012, 05:33 AM   #24
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Does that mean it is fine to run it right up to "plugged" or do you suggest that it would be normal to replace sooner, like say 80-90% plugged?
My air filter indicator is easy to read and is located near the engine/trans dip sticks. You will see the need to replace coming so you can time the maintenance.
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Old 09-11-2012, 09:07 AM   #25
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After 30 years of gas powered Class A's, we switched to a diesel 2 years ago. Remember these big diesels are industrial machines that do not see the constant use in the RV world that they were build for. This adds to the upkeep needs.

PROs: We enjoy the bigger RV and its ability to go up our hills without slowing to a crawl. It is quieter and smoother up front. We spend less per mile for fuel due to the better fuel mileage. We enjoy the upgrade.

CONs: Longer wheelbase = harder to get into tight places & wider swings to make the turns on city streets. Larger volumes & more lubricants along with filters to change & more often drive the maintance costs upward. Bigger tires cost proportionately more.

Common: Infrequent use maintanence items still exist. Often oils, filters, & tires are changed based upon time & not actual need from use. Finding the problematic upkeep spots (from lack of use) is a challange and may not show up until after a major repair. We just finished a repair of leaking core plugs under the exhaust manifold. The turbo & e-brake valves were also found to be frozen and replacing those added greatly to the big labor repair cost.

Learning the personality, care & feeding of the beast is all part of the experience and enjoyment. We are still learning....
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Old 11-24-2012, 09:26 PM   #26
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I have a Fred. Ride is between gas and dp. Maint is between. Price, between. Each to their own likes.
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