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-   -   04' Dynasty - higher miles / tranny question (http://www.irv2.com/forums/f115/04-dynasty-higher-miles-tranny-question-20002.html)

Globetrotter 04-29-2007 04:48 PM

Hi,
I test drove my first diesel pusher last week as we desire to go from a gas unit to diesel.
This '04 in appearance seems in good condition but has a lot of miles at 50,000.
While the test ride went well in all respects I have one concern. When accelerating in the approx 20-30mph range it shifted really hard in my opinion. Is that normal in these coaches or should it be very smooth thru all gear changes??
Also is there any concern I should have given the mileage on this unit??
Thanks for your input.

Globetrotter 04-29-2007 04:48 PM

Hi,
I test drove my first diesel pusher last week as we desire to go from a gas unit to diesel.
This '04 in appearance seems in good condition but has a lot of miles at 50,000.
While the test ride went well in all respects I have one concern. When accelerating in the approx 20-30mph range it shifted really hard in my opinion. Is that normal in these coaches or should it be very smooth thru all gear changes??
Also is there any concern I should have given the mileage on this unit??
Thanks for your input.

WayneLee 04-29-2007 05:02 PM

Globetrotter: I understand your excitement since I just made the switch from gas to diesel. But, not knowing which coach, which engine and which transmission, it's hard to answer your questions. But, to answer your mileage question - in general, diesel engines are designed to run many more miles that you will ever drive the coach. I have heard of people getting 200,000 miles on a diesel engine and others claim that you should be able to get 300,000 miles or more. A lot depends on how the former owner did the maintenance. If you have any questions about the engine condition, you can have an independent RV repair shop take a look at the engine and transmission before you purchase.

Globetrotter 04-29-2007 05:15 PM

Thanks for the note. I should have mentioned it is a 400 cummins with an allison Transmission.

Spur 04-29-2007 05:44 PM

I agree with WayneLee, have a mechanic look at it if you really like the coach. The Allison should be smooth through all gears. Allisons do have a "brain" and can detect different driver's driving habits. If the drivers are real different, you may detect a hard shift, but that usually clears up after a few starts and stops. We had a new shift program downloaded in ours and the rep was explaining that it could also cause a hard shift for a while, but it was only noticeable the first time from a dead start, then it cleared up.

teofff 04-29-2007 05:56 PM

I recently bought an 01 Dynasty with 59,000 miles, while I was making the buying decision, all of the advice I received from my Rving friends (self proclaimed experts!!)...assured me that 59,000 was not something I should be overly concerned with...particularly since the coach was in great shape thoughout. It was obvious that the original owner took excellent care of the MH. Yours is newer, and obviously the original owners traveled alot, but what shape is the MH in???

Dutch Star Don 04-29-2007 06:08 PM

Globetrotter....I have the 400 Cummins with the Allison and ocasionally it will hard shift because I backed off or got on the throttle weird as it was about to shift.

The Allison definitely has a learning curve and will need time to understand your driving habits.

Renegades 04-29-2007 06:16 PM

Globetrotter,

When I bought my DP it had 17468 miles on it, this was Oct 2000, I now have 108610 miles on it and runs like a CAT should. These diesel engines built today will last you a very long time. If you don't mind getting your hands dirty, change your own oil and filters. Also, always carry spare fuel filters with you. You never know when you will get a bad load of fuel and you die on the road side. Voice of experience. I now carry 2 primary and 2 secondary fuel filters.

Yes the Allison does have a learning curve, one thing, you can really hurt the Allison. These were originally designed for heavy duty trucks and earth moving equipment. This is the best transmission for an RV.

Enjoy.

Globetrotter 04-29-2007 06:25 PM

Thanks everyone for the feedback. Interesting to learn how sophisticated these trannies are. The coach itself is in very good condition. I do agree an independant assessment is a good move for both the engine and the tranny as they are the most expensive components to deal with. Tires, brakes , air bags, shocks etc can all be expected to need replacement at some point however no one wants an engine or transmission to repair to replace.
Thanks again!!!

Globetrotter 04-29-2007 06:51 PM

Renegade, did you mean you "can't" really hurt the Allison given it was built for bigger equipment?? a typo I'm guessing.

Renegades 05-03-2007 10:57 AM

The trannies designed for MH came from the design used for garbage trucks and other heavy duty types. I got this info from an Allison shop in Ft Smith AR as I had stop to have the filters changed. Was going to do it myself but since I was there had them do it. The filters cost me around $53.00 and the change and refill cost about $92.00 and change. All told about $145. I had done my own before. It took him about an 1 1/2 hours to do the work. From my last change to this one, there was about 50k miles on the oil and filters. They said about 40 max for the type III. The one in my coach is an MD3060 which if I remember correctly is medium duty and the RV's are light duty. My gvw is 28000 but I only load out to around 25k. Pulling a jeep I'm some where around 29k with a gcvw max of 33000. It does make a difference. When I full timed for 6 months I was just under the gvw at 27680. Still no problems with the transmission. Did get some bad fuel and well that's another story. Good luck.

Jim

Globetrotter 05-03-2007 05:32 PM

Thanks Jim, I appreciate your taking the time to provide this info which is very helpful.


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