occasional slipping transmission

[lngfish]

Thanks guys,

Last night I remembered I asked about the clutch, LOL.

Anyway, when I changed mine It was a HD one I got a NAPA and from what you are saying Rick yours isn't operating correctly. Not sure where you got yours however.

In my scenario with the timing I sort of did not mention where it cuts back in.

But anyway, from where my home is to where paved gravel is a mile.

Between these 2 points, the fan clutch engages some amount.

Then when I get moving, say 45 MPH, each and every time at Westbury's home the fan clutch dis-engages. I'd say engine noise is reduced over 50%.

This is about 1.5 miles. During the 1.5 mile distance fan is moderately noisy to the point I will sometimes look to see if I'm in Drive.

Basically to me the fan is overkilling it. But as long as it works I'm OK with it.

Then mine stay disengaged for 10 miles till I get to town, mostly down hill. Then it mostly likely will engage softly, not harshly.

During hard Summer driving going through small towns, if towns are say 10-20 miles apart, it will stay dis engaged in between towns, and engage when entering the next town.

It is consistent.

When engaging I'm 100% sure is not locking up and just engaging a percentage as I know what 100% locked down sounds like as on failed on me.

If I had to guess by sound I'd say it is engaging to 25%-50% speed.

I think the blades are riveted on.

NAPA had standard duty and regular duty when mine crapped the bad. I got the HD one.

If you want me to dig out the part number I can.

Thanks for explanation on the silicone in there, makes sense.

[lngfish]

Rick,

From reading your post again seems like ours could be the same NAPA ones.  Very sensitive to abrupt opening of engine thermostat.  There has to be a way to get around this fact.

Maybe shroud off some air flow on inlet side of radiator?  Anyway, just a thought without thinking about it much.
I learned that these engines and cooling systems will overheat backing up allot. Since I did it twice.

1st time I said what in the world!  2nd time I did it to see if 1st time was for real and it was.

Apparently you need forward movement of vehicle to keep things cool.

I was using RV generator to use my electric chain saw to cut limbs on my 400' driveway on a hot summer day in reverse. Bugger got HOT.  Driveway in inclined about 3-5 degrees however and I was backing up a hill.
Very rare for sure.  High temp alarm worked and I got limbs cut and no damage to engine and I tested radiator cap when it bubbled over to reserve tanks. It cooled off in 30-45 min.

[legomybago]

I would put the most "severe" duty clutch they make. I believe hayden has 3 different temperature clutchs. Standard, HD, Extreme duty. When the clutch froze up on our P30, the father in-law installed the Standard duty hayden clutch, it never shut off, so he replaced it with the HD "middle temp clutch", and it took a few hundred miles of driving for this clutch to work like it's supposed to. I was almost ready to take it off and put the extreme duty clutch on, but it seems to work ok now. Only comes on when climbing a steep hill, or when stop n go traffic and it's hot out. I would still put the highest heat rating clutch in a class A coach. The only time you should hear a fan clutch engage is when your temp gauge goes up, and at cold start up. MO