Tranny losing fluid

[Racer]

Tranny losing fluid into primary

OK, so I went to change my transmission fluid and primary fluid today. First I went to drain transmission fluid, very little came out. Then I went to drain primary and got about 51 oz. out. From what I have read on the forum I am quessing I have a bad seal? Has anyone changed this seal/o-ring? If so, do you have any pics.? Is the seal located behind clutch basket? Will I need a puller of any sort? Any help would be appreciated.

 

[Bobby Schulz]

The seal behind the clutch basket is leaking and needs to be replaced. You also need to make sure that the primary, and trans vent are open and not clogged. When you get in there see if the input shaft has any play in it at all.... If it does the bearing is bad inside the trans. The shaft can move around causing the leak and the trans would need a rebuild.

 

[Sven]

Dual seal in one has two walls to collapse

I am messing with a 4-speed. You want photo to basically what you are about to tackle? I walked away from it. Gave it a rest and now will go back with a new approach. I'm going to swap out as many seals from the kit as possible.

You will need to borrow or buy a special tool to go deep, meaning, that shaft and clutch push rod, has to clear to gain access to the sprocket nut. With this sample, both the nut to hold the clutch basket, plus the sprocket nut; both turn left to tighten, right to loosen. Both have left hand threads, in other words. I would assume the input shaft and output gear w/threads use the same thread arrangement. Correct me if I am wrong.

Gotta remember about nicking that seal area with a ding to that surface. The idea is to work away from it, or know you have to remember where not to hit or slip with any yanking out or catching a seal that way.

Notice the input shaft with the smaller seal that needs to go too [might as well].

 

[New Boots]

Bob what you need is a Service Manual or if you are only interested in the Transmission click on the links provided. The search program on the forum works great for finding almost anything you may come up with or need when the Service Manual don’t answer the question you may have. You will need to go to the General Forum and look for the Opting in thread and complete that so the search program will search it all. Almost all the guys here and gals work so should you need a answer right away the search feature just might save the day for you? :2thumbs:

 

[Racer]

Bob what you need is a Service Manual or if you are only interested in the Transmission click on the links provided. The search program on the forum works great for finding almost anything you may come up with or need when the Service Manual don’t answer the question you may have. You will need to go to the General Forum and look for the Opting in thread and complete that so the search program will search it all. Almost all the guys here and gals work so should you need a answer right away the search feature just might save the day for you? :2thumbs:

I have that manual. Is the seal that I need to replace number 7 & 8 on diagram? Do I need a puller to get the pld one out?

 

[New Boots]

All the seals are easy to change out. Is it behind the drive sprocket or the seal in the end of the main drive gear/main shaft? About the same diameter as a quarter.
If it's that small one leaking, take a small flat head screwdriver and carefully pry it out of the end of the drive gear. To install the new one, put a little oil onto the seal and carefully tap it into the end of the main drive gear. Make sure you go just beyond the end of the main shaft with the seal ( a little less than 1/8")
If it's the large one behind the Drive Sprocket, that ones very easy to remove and replace. There are 2 seals with that. The large one that is easy to see behind the Sprocket and then a quad seal that is under the Sprocket spacer. The spacer is located on the main drive gear and can be removed by either grabbing it with your fingers and pulling it off, or may have to carefully use a pair of channel locks to grab hold of it.
**Note** When you remove the seals and sprocket spacer from the transmission, grab hold of the main drive gear and try to move it up and down. If any play, most likely the bearings in the transmission are bad. How many miles are on the tranny

http://www.bigdogbiker.com/forums/help-wanted/27202-fluid-leak-between-transmission-sproket-shaft.html

 

[Racer]

http://www.bigdogbiker.com/forums/help-wanted/27202-fluid-leak-between-transmission-sproket-shaft.html

Are you saying the seals are on the belt side and not on the primary side, behind clutch basket, as Bobby Schultz stated? If they were on the belt side I would be losing fluid externally, would I not? My fluid is going into primary case.

 

[Sven]

Are you saying the seals are on the belt side and not on the primary side, behind clutch basket, as Bobby Schultz stated? If they were on the belt side I would be losing fluid externally, would I not? My fluid is going into primary case.

Walk the large seal out to the push rod:

1. The new seal is behind the pulley/sprocket. This would leak under the trans, down the frame, on the ground.

2. See that thinner seal as you walk the shaft towards you? That too, should leak down the inner primary, down to the ground.

3. See the push rod? There is a nut that goes over that shaft. A seal slides over that rod that is inside the left hand clutch basket nut. There is where you separate the trans fluid from the primary fluid (if applies).

Those are your basic trans leaks, inside and outside the primary.