Tires and tranny Questions

[charlee]

Has anyone tried firestone 245/70/19.5 on a coach? If so how did they do? I would also like some info on changeing the tranny fluid, my coach has 32,000 on it and i don't have any records on it,lucus or not,syn. or not?
Thanks folks

[NALSO]

Charlee.

When I bought my rig it had a set of new tires on it, but I hear that Good Year and Michelin make good tires for Motor Homes.

As far as the transmission is concerned, I will change to Mobil 1 synthetic as soon as i get my filter and gasket from my local supplier. I also run synthetic in the engine.

Good Luck with your project,

Henry.

[charlee]

Thanks Henry,I'm considering mobil 1 syn. .I have had people tell me to go with regular oil an add some Lucus . Just trying to get an idea of what people are runing in the tranny. I know most people are running Goodyears or Michelin's, Firestones are a little cheaper.

[twalton]

Hi Charlee,

When I changed my tranny fluid with synthetic my trans temp went down a little, and you will get longer service out of it as it can handle higher operating temps. I feel it's worth the difference in price. When looking at tires don't overlook the Cooper Roadmaster.

[Gary RVRoamer]

Go with synthetic in the tranny - its longer life and heat resistance is well worth the cost. The engine is a different story - if you are going to change annually anyway and drive a typical 6-10k miles per year, any good grade of oil will do fine in the crankcase. Synthetic is still a good choice, but it is harder to economically justify unless you extend the change interval.

[twalton]

HI Gary, I hadn't really thought of it in that way before but you're right, since I change the engine oil every year anyway it really doesn't make ant sense to put synthetic in the engine. The only time it might be practical would be if I knew that I was going on a trip of extended mileage. Got any Idea how many miles you can expect from synthetic motor oil?

Thanks in advance

[Gary RVRoamer]

If you want to go beyond one year, you need to have the oil analyzed to be sure it is still within spec for lubricants, cleanliness (lack of soot & acids), etc. Instead of changing at each interval, do the test and if it is ok, keep going. DO change the filter each time, though. That will also introduce about a quart or so of fresh oil and helps replenish the additives.

I've heard some guys say they have never had to change it - the filter changes keep them going. Certainly you ought to get 2-3 years out of it if the engine is running well and not dripping a lot of crud into the crankcase.