CK5
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Project "RESPAWN" - 1972 K5 Blazer

Cool stuff here!
Leave the T-case empty for a few weeks and drive around. If it's full next time you check it, the transmission is leaking into it.

You're welcome.


-G
Unfortunately I have to drive it tomorrow. I filled the t-case back up, about ready to fire it up and check the tranny fluid again (was full). If it is low by several qts then I know it was leaking into the t-case as well.
 
For better or worse I've been driving my np205 around with ATF for a while now and keep an eye on my transmission level.
The transmission after warmup is still holding full fluid but I'm sure it will slowly find it's way back to the t-case. I will just keep an eye on the transmission level and fill as needed... at least it's somewhat clean now. lol
 
So, I went to change the fluid on my NP241 and about 5.5 - 6 qt's of ATF came out, oh crap. First thing I thought of was a bad seal? Is the seal on the t-case side?

I need to drive this tomorrow and other things coming up so I was thinking just fill er back up and drive on for now. Any suggestions on how to proceed? Thinking of putting the drain plug back in filling it up and checking the trans level, if the tranny is low then it obviously drained into the t-case.
Yes, the seal is on the input shaft of the T-case. It could be that someone didn't put the correct seal in, or two seals facing opposite directions. I would worry about it when you have time. It's good that you refilled the case.
 
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I plan on dropping the transmission pan and changing the fluid and filter, anything else to look at or change while I have the pan off?
 
As long as you don’t have chunks, just make sure your filter has a new seal/o rings.

I grease then with something, and do the same to one side of the gasket, so you can drop the pan without ruining it
 
Took the inspection cover off, the flywheel looks great and the 3 converter to flywheel bolts are tight.

Can't figure out where the weird ticking sound is coming from.

 
Could possibly be high mileage on the main bearings.
 
Usually loose mains make a woodpecker sound after a cold start until oil pressure builds up..
It could be the front pump or torque converter making that noise..
Sure the starter nose or drive isn't touching the flex plate ?..
 
Usually loose mains make a woodpecker sound after a cold start until oil pressure builds up..
It could be the front pump or torque converter making that noise..
Sure the starter nose or drive isn't touching the flex plate ?..
Just double checked, starter has plenty of room and is not touching the flex plate.
Is there an easy way to test the pump or torque converter?
 
Does it sound like this?

He said it was a bad torque converter. Could also be the lock up clutch.
 
Does it sound like this?

He said it was a bad torque converter. Could also be the lock up clutch.
It does sound similar
 
Pull the torque converter bolts and run the engine. It might have enough clearance to not spin with the engine running. Pump is just a vane style hydraulic pump and shouldn't make noise.
 
Could be the oil pump drive shaft or pump itself maybe,or the distributor or its drive gear..
A mechanics stethascope would help to pin down where its coming from..

I had a SBC that had one rocker arm tapping against the valve cover,it sounded like a bad piston..there was a dent in the cover,probably from a chain used on it to hoist it into the truck --I had to take the cover off and pound it back out with a hammer..I saw marks where some of the other rocker arms had made contact too,I assumed the engine had a high lift cam installed ?...
 
Based on the frequency from the video, in person does it also sound like the ticking noise happens more than once, possibly multiple times per engine revolution?

Did it change at all when you took the cover off?

If you don't have a mechanic stethoscope I've found even a piece of wood or a broom stick can work like one in a pinch. Just put one end on the culprit area and the other end against your ear. (Obviously be careful where you place it on a running engine) Anyway, you move the wood around until you hear the sound the loudest to see where it is coming from.
 
Maybe I can rent a mechanic stethoscope at Autozone?
 
I don't think I would want to put a used one of those in my ears. Try the broom stick or skinny piece of wood, you might be surprised how well it works if you get your ear pushed against the other end of the piece of wood.
 
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Based on the frequency from the video, in person does it also sound like the ticking noise happens more than once, possibly multiple times per engine revolution?

Did it change at all when you took the cover off?

If you don't have a mechanic stethoscope I've found even a piece of wood or a broom stick can work like one in a pinch. Just put one end on the culprit area and the other end against your ear. (Obviously be careful where you place it on a running engine) Anyway, you move the wood around until you hear the sound the loudest to see where it is coming from.
The sound is very consistent and sounds almost like tiny pebbles moving around in a drum. The noise sounds a "little" quieter with the cover off but not much.
 

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