I hate that Isuzu replacement transmission plug

[deermagnet]

edit

[blacksambo]

Nice work. And...smart thinking!

[johnnyapollo]

So the "replacement" from that SB has an o-ring that the original didn't - obstensibly to correct for a rough or "off" finish on the surface of the casing. I wonder why they didn't just add a copper crush washer to the old to make a seal? Looks to me that you're only supposed to apply 28 lb ft of torque and the allen is there to keep you from over-tightening - either that or the plug is designed to be "disposable" (single use). Let us know how the new one works out. If you look around there's also a washer that has a neoprene backing that might work to improve the seal against the casing if the one you have doesn't fix the leak.

-- John

[Ebenezr]

No one should have to go thru that.

[evillecutter]

i know this thread is old but im going through a similar situation: i changed the trans fluid and everything was fine but when i went to put the bolt back in the overflow i noticed something hanging off of it - it was the little rubber gasket falling off - i put it back on but it leaks so i made my own gasket out of a very thin piece of rubber/plastic stuff i had lying around and it worked for a day or two but i have a very slow leak again - i ordered the dorman replacement bolt that deermagnet found (thanks deermagnet) but i noticed it is quite a bit longer than the original trans bolt - this extra length will not interfere with the trans?

[vt_maverick]

So does this mean the oil pan plug should have an o-ring or crush washer too? Mine has neither...

[Scott Larson]

So Mark, I take it that you really dislike the Isuzu replacement plug?

[Scott Larson]

You mean to say that it's even worse then cooked cabbage, stewed tomatoes and liver?? ...IMPOSSIBLE!!

[PK]

That type of plug is widely used in high pressure hydraulic valving.
The design of the entrapped o-ring means that any pressure trying to get out, helps the seal to tighten.
They have a reputation of needing the BFH treatment to get them out.

Total overkill for our transmission pans.

PK

[Jolly Roger VX'er]

My memory is really getting bad nowadays but I'm pretty sure I used teflon thread-sealing tape on mine even though I had no signs of leakage to keep it that way.