Cotter Pin in Transmission pan?

[WVKid]

Wow!! The stuff I don't know about my NNA. lol

I have a hydraulic oil leak in the bottom of the transmission pan and it was putting a nice puddle of oil on the driveway.

I saw it coming from a cotter pin and said what the sam hill is it doing there?

I go it out and coated a screw with JB Weld and fixed the leak.

I then found out by reading an old post from 2009 that the cotter pin is supposed to be there and it's supposed to leak. The post said it keeps the clutch from getting soaked in oil.

I'm going to replace the cotter pin but I would like to know if I can use a smaller pin? The old pin is about the size of 5/32" and seems to leak too much. Can I use a smaller cotter pin?

Would like to know why if the cotter pin was in the original design?

Thanks,
WVKid

 

[HCooke]

Not only is the cotter pin supposed to be there, but
it is supposed to leak there as opposed to coating
the pressure plate and make the clutch disk sticky.

 

[Den N Ms]

WVKid,The reason it has a cotter key in the hole is to keep it open and not stopped up with oil and dirt.The tall weeds and grass,stubble rubs the bent cotter key thus keeps the hole open.If it's leaking badly your front transmission is bad after decades of use(worn,dried and cracked)Always replace it if you ever change the clutch. Also your transmission could be over full.Pull out the bottom bolt on the round dipstick cover (by your right heal ) and let the transmission grease drain in a pan till it stops leaking out.Then put the bolt back in.

 

[souNdguy]

your flawed logic is telling you that if you change pin size you will somehow change the actual leak.

the leak is either the trans input shaft seal.. or the rear man seal.

changing the pin size or plugging hte hole is only MASKING the problem.

you need to fix the problem.. not dink with the bellhousing drain that is TRYING to protect that 350$ clutch.

if your trans is overfull.. it will likley leak..

 

[Bruce (VA)]

" I go it out and coated a screw with JB Weld and fixed the leak."

That's commonly called "fixing it until it's broke"
50 Tips

 

[awhtx]

"The stuff I don't know about my NNA."

I don't know what an NNA is. Can you give me a hint?

 

[WVKid]

(quoted from post at 16:15:20 08/30/12) your flawed logic is telling you that if you change pin size you will somehow change the actual leak.

the leak is either the trans input shaft seal.. or the rear man seal.

changing the pin size or plugging hte hole is only MASKING the problem.

you need to fix the problem.. not dink with the bellhousing drain that is TRYING to protect that 350$ clutch.

if your trans is overfull.. it will likley leak..

I drained the trans. it holds 6 quarts and it looks milkie, I want to put new fluid in, what type should I use?

 

[WVKid]

NNA is a 1953 Ford Jubilee

 

[WVKid]

That's what I am think, it's over full. I drained it into a large pan and I am going to pour it back into quart bottles. Spec's call for 6 quarts.

Old fluid looks milkie, and not sure what type to buy.

Thanks,
WVKid

 

[souNdguy]

a NAA trans can use either 80w90 gear oil ( gl4/5 ).. or UTF fluid meeting the ford M2C134 spec.

most any UTF fluid made nowadays meets that spec.

naa hyds needs utf.

naa rear end can use same as trans.

 

[awhtx]

I always thought a 1953 Ford Jubilee was an NAA! Learn something new every day.

 

[Anonymous-0]

It's either the engine rear seal or trans. Do you want to know which? Drain the oil from the trans and let the tractor sit for a few days and check the leaks. If its still leaking, its engine, if no leak, probably trans.

 

[2ruNgineer]

yea i heard the chuckling, but i nearly did the same thing on my 3 cotter pins for my newly acquired 2N three years ago....luckily i hit this site first.
really, what would be the logic be of hangin cotter pins out the bottom of yer tranny case????

 

[Ed Douglas]

Priceless Bruce......Priceless!!
I laughed outloud.....and I will use that quote!!

 

[Dell (WA)]

2ruNgineer........the jingly-jangly tranny cotter keys is to keep the drain hole open. In the long ago time before weed spray, weed control was done by "shovels" (V-shaped devices) that just scrapped the DRY dirt between rows of crops (corn, tabaca) the cotter keys kept the tranny drain hole OPEN. Otherwize, oily dirt would clog the tranny drains. .........dirty Dell

 

[CJ in Michigan]

I thought that when you removed that pin the tractor split-

 

[36 Coupe]

Tell us how you will replace the cotter pin.Ford used the cotter in the first 1932 V8 autos and trucks.When I saw the first one I figured it was there to let oil leakage out of the clutch housing.I knew a fellow who plugged the drain hole on a new MF tractorl The fellow he sold it to had to replace the clutch.

 

[36 Coupe]

The weed and stubble idea sounds good but Ford cars and trucks used the same cotter pin drain.No grass unless the Fords went parking.

 

[Ultradog MN]

Ford used that same cotter pin on their tractors till the mid 1980s that I know of and probably beyond that.

Edit:
If I was the dictator of all the world the first thing I would do is outlaw the use of JB Weld

 

[36 Coupe]

JB weld is useful when used right.Some people shouldnt use tools or own tractors.Common sense is lacking.My truck has a slight leak on the rear main seal but I know enough to leave it alone.