Transmission Leak....

[agood1]

OK, I’ve done allot of searching and so far I haven't found anything conclusive.

I took the deuce out for the weekend to a friend's place in the mountains. The next day we took it out for a trail ride....when we stopped to get fuel, I noticed a puddle of oil dripping from the front area.
We took it back to the cabin, and parked it for the night. The next day I drove it back home. (about 70 miles at interstate speeds) About 10 miles from home, I noticed the clutch started slipping in 4th and 5th gear. When I got home there was a considerable drip from the bell housing...about a drop a second and oil was sprayed all over everything from the wind on the highway.

The next day I got up and checked and it is definitely gear oil, can tell by the smell.

Now, I have not checked the tranny oil level, but I bought this truck from a member on this site that is very knowledgeable about these trucks and he has driven it much farther on the highway than I did and he had no leak issues.

Update: Changed the fluid and filled it to about 1" below the hole and had not leaked a drop sense.

 

[doghead]

Plugged vent or over filled(contaminated). It needs to be about 1" below the fill hole.

 

[agood1]

As stated, I don't think it is an over filled situation. If it was, shouldn't it stop leaking after it dumps the oil down to the recommend level?

 

[doghead]

It will stop leaking, eventually!
You haven't checked the level, you cannot say(for sure) where it is now, or of what quality the oil is either.(a simple assumption would be that it is overfull)

What speeds were you driving? There are may questions to ask, but a simple level check would be the first place to start.

 

[agood1]

I agree, I need to check the level, and will do so tonight.

I was driving 55-60 most of the time.
But It also leaked after I spent a few hours riding slowly on the trails and dirt roads.

 

[GoHot229]

He's right, likely an overfill, thus running out the front of the trans, slopping all over the clutch and PP. That is likely the cause of the slippage.

 

[doghead]

If you did some deep water crossings or somehow introduced water into the oil, it will need to be drained and refilled to the correct level.

If you simply drove it hard(high speeds) and is foamed up and leaking, you may be able to simply drain off a small amount to get the level down a bit more.

There is no seal to go bad, on the input shaft. It has a spiraled groove and an oil shield.

I would not be afraid to adjust the oil level to 1.5" below the fill hole.

 

[agood1]

Yes, I did do a water fording....but it should not have been deep enough to get in the tranny. But that does make more sense than it simply being over filled. This truck was driven about 50 miles at interstate speeds about 2 weeks ago, and it did not leak, and nothing has been touched on the tranny since.
Here is a video
[media]http://www.youtube.com/watch?v=FjPvbMqtCT8[/media]

 

[doghead]

That water does look deep enough to be above the centerline of the input shaft. That will do it. A warm transmission and cold water, it will get in there, trust me!

I suggest you drain and refill with new oil, don't overfill it!


In the -10, Operators Manual, it tells you about the plug, that needs to be installed for water crossings. I presume you either did not read that and or did not have the bell-housing plug installed for water crossing.

 

[agood1]

I hope you are right....will save me a ton of work....well, maybe...I guess I will still have to pull the transmission to clean off the clutch.

 

[doghead]

You probably don't need to remove the trans to do a reasonable cleaning. Several guys here have had the same issue and simply sprayed brakekleen up there and rinsed it well enough to work fine.(including myself)

 

[pigfoot63]

Don't know for sure if this is your problem but I have seem it many times . The front bearing retainer on the transmission will wear and allow oil to come out of the transmission. We use a go -no gauge to check these when rebuilding . Also thier is a plug behind the bellhousing that will leak.

 

[agood1]

Don't know for sure if this is your problem but I have seem it many times . The front bearing retainer on the transmission will wear and allow oil to come out of the transmission. We use a go -no gauge to check these when rebuilding . Also thier is a plug behind the bellhousing that will leak.

OK, well if my oil level is good then I guess I will have to look at this....but I assume I can't measure any clearances without removing the tranny and tearing it apart.
Where is this plug exactly?

 

[pigfoot63]

TM9-2520-246-34 is the TM for this trans the 34P hhas some real nice pictures.
Check the simple stuff first before you jerk the trans out

 

[agood1]

OK, I checked the gear box oil and it was about an inch below the fill hole. It was nice and clean honey colored. The oil on the ground was dark, but not as dark as the engine oil and it definitely smelled of gear oil.
I also checked the vent, which I assume the the small 7/16 fitting on the top of the gear box with a cap on it....and it was clear.
I cleaned off the bottom of the gear box and started it up and let it run for over 30 minutes, and there were no drips.....

If the gear box oil was too hot where would it be forced out? The Vent? IS there another opening somewhere inside the bell housing.....pretty poor design to dump over flow oil onto the clutch and not just out the side of the tranny.,

So what else should I check?

 

[pigfoot63]

Don't panic yet. Get you some brake cleaner and clean everything the best you can and take it on a run bring it home and recheck the oil level and look for leaks. These are really good transmissions and are fairly simple to work on. If I can stick my finger in the fill hole and touch oil I consider it full. If I can help give me a holler.

 

[Billy Bobbed]

Ive been told that you can put your front bumper against a tree and put it in gear and let out on the clutch a little and heat the clutch not much or you will burn the clutch and burn the flywheel.Untill it grabes better.

 

[agood1]

Should I spray the brake clean while the engine is running?

 

[agood1]

Bump.....

Should it be sprayed with the engine running? Not sure how to get it all clean with it not running, But I know the fumes from many products can be sucked into a diesel engine and make it overspeed.

 

[rosco]

I'd just do it when engine is stopped. Might take a couple of cans. Otherwise, I agree - that water is plenty deep enough to get into the transmission, especially the front end. When you stopped, is probably when it gets in.

Lee in Alaska