Mobil 1, will it help ???
 

I have a 1992 454 chev with a King Cobra that looses reverse after it gets warmed up, after the drive cools down reverse returns. I have been told to use Mobil 1 75-90 wt synthetic gear lube and this might help my problem. Is there a marine version of Mobile 1 or is there just the one kind. I put on a drive shower and it doesent help. I hope someone has some thoughts on why reverse is this way. Shifting has been adjusted to factory specs by a omc dealer and the boat has 82 hrs on it. Any thoughts by anyone? pretty PLEASE even with sugar added if it will get me some replies. Thanks, Denny

Re: Mobil 1, will it help ???
 

Probably no miracles in a can at this point. And I believe the synthetic, being slicker, would only make matters worse. I would have the dealer (or a different one) recheck that adjustment letting them know the problem and suggest loading it a bit heaver to reverse. But usually once they start to slip, nothing short of new parts cures the problem. Sorry; I hope I'm wrong. --- Jer

Re: Mobil 1, will it help ???
 

As the drive is heating up metals tend to contract a bit and "gaps widen somewhat"...get it re-adjusted as you are close but not quite there yet.

Then go with a good PAO synthetic gearlube and if you want a "branded product" for MARINE...Amsoil has a good one.

Re: Mobil 1, will it help ???
 

I must have really been asleep in physics class cause all these years I thought that metal expanded when heated, not contracted. :eek: But if you really want to try the "miracle in can", then the Amsoil suggestion is probably the very best way to go as it WILL reduce heat buildup. I just thought that since the addition of a drive shower didn't help, a change to syn. lube to reduce heat wouldn't do the trick either. It really won't cost that much time or $ to try..Go for it. --- Jer

Re: Mobil 1, will it help ???
 

I always thought..and water to ice is a good example...that as it gets colder and freezes it expands and cracks unwinterized boat engine blocks...

oui..oui..jp?



....you must have gone to a French university :D

Re: Mobil 1, will it help ???
 

Water is a bit of an oddity. It is always most dense at 4 degrees celsius. Under that temp, it expands getting colder, above that temp, it expands getting hotter.

Metal expands as it gets hotter.

Re: Mobil 1, will it help ???
 

yea yea..what was I thinking...40 lashes

The metall(s) that expands most with temperature also contracts most. Cast iron does not give much in either direction whereas softer metalls will.

Re: Mobil 1, will it help ???
 

Hydo, you may of had a brain fart on this expansion thing but you know your chit about oil.

Re: Mobil 1, will it help ???
 

Actually, as water (the liquid) changes to it's solid,crystalline form (ice) it's volume increases. Thereafter, as the temperature decreases further, ice, like any other solid contracts.

Achtung, Hydro! Thats German science! --- Jer

Re: Mobil 1, will it help ???
 

I think jap technology is ahead of the German's these days..A Mouse Is An Elephant Built By The Japanese :D

Re: Mobil 1, will it help ???
 

Yeah, Hydro; You may have a point. Up here in this land of hills, ice, and snow we had the Audi Quattro for several years. Now we have a Subaru that gets us around just as well, has less problems, and is much cheaper to buy and maintain. (although it isn't really quite as much fun to drive) But we digress here. --- Jer

Re: Mobil 1, will it help ???
 

It's sad to see Mercedes Benz customer satisfaction surverys showing that the car has more than average repairs. The Lexus is about as perfect as it gets they say..though I am a MB fan and never really liked rice burners to a great extent.

Porsche seems to have a good thing going with the new Turbo S Carrera.

The funny thing is nobody ..including the Japs..can catch Ferrari which seems to be at the top of it's game with the Enzo and the new F-340 owning that market and the 100k over sticker that goes with it. Usually Italian cars and high tech were not words in the same sentence.

Nice to see GM finally made it's best car ever in it's history...the ZO-6 Corvette...though it's still a Corvette it's a darn fast one that handles very well...wish they had a 5 grand interior upgrade...the interior is what YOU look at when you are driving...it has a Pontiac Trans AM look...needs an upgrade option is all...leather dash..some carbon inserts..some aluminum inserts...wait..then it would look like a Porsche... also needs a roll bar option as most dragways require one in 11 second cars and a sunroof atleast would be nice.

Re: Mobil 1, will it help ???
 

The outdrive oil must be 100% synthetic. You can not use the same gear oil as Merc.

I had this problem with a 1991 454 King Cobra. Drained the out drive, and checked the cables.

Re: Mobil 1, will it help ???
 

Ice below 32 degrees? Interesting.

Re: Mobil 1, will it help ???
 

swood, do you remember exactly what oil you used and do I just need to drain and refill or do something else? I had a reply on a different forum that said to clean the gears with laquer thinner??? something about a glaze. The cables have been checked and set to factory specs. thanks for the reply. :D

Re: Mobil 1, will it help ???
 

Water is at it's most dense point at 4 degrees Celsius. Not that it has any bearing here, just something I remember from high school. :)

Re: Mobil 1, will it help ???
 

Yes, Ice is it's warmest at 32*F, and like any other medium will get colder as you take more calories (or BTU's) away. Also of note, since it was touched on in a recent thread; When testing a gage sender or thermostat in a pot of boiling water, do not assume that the max temp. reached in that pot is 212*F. The steam in the bubbles surrounding the piece being tested may be WAY hotter. --- Jer

Re: Mobil 1, will it help ???
 

And to confuse things even further: If you live on the top of a mountain with a 12,000 ft. elevation, you can boil an egg for about 1/2 hr. before it is cooked to the consistency of 3 mins. boiling at sea level cause water boils at about 160*F in that atmosphere and it takes a long time to cook an egg at 160*. We tend to assume that all ice is 32*F and all boiling water is 212*F This is just NOT so. --- Jer

Re: Mobil 1, will it help ???
 

I was going to point that out, but I didn't want to confuse the masses. :)

Re: Mobil 1, will it help ???
 

You can use the Mobil 1. The problem is that when the oil is warm, the cone clutch can not move the oil out fast enough to engage in reverse. I replaced the lower cables because they werent moving freely.