Magnetic Transmission Bolt! - SRT Forums

gt5oh · 02-16-2007, 12:27 AM

I am having a very difficult time finding the thread pitch size of the transmission drain bolts on our SRT4s.

I am desperatly looking for this info in order to push forward with an idea of making a product with a buddy of mine. I haven't gotten a chance to actively pull out my own bolt and measure it so I am asking if anyone has a test vehicle or in the process of a build or simply changing transmission fluid soon.

Measuring of the bolt is usually done with a Thread Guage like such (http://www.boltdepot.com/images/cata...tric-large.jpg, or you can print this one out for free here - http://www.boltdepot.com/fastener-in...read-Gauge.pdf) This is metric by the way.

If someone could get back to me with an answer it would be great, thanks.

jersturbo · 02-16-2007, 08:27 AM

there is alreay a magnetic washer set in the tranmission by the factory, for metal particle pick-up

gt5oh · 02-16-2007, 08:39 AM

I honestly believe the magnetic pieces the factories put in are extremly weak and often get caked with metal particles and lose their pull. The only way to clean these pieces is to actually go in there, whereas the bolt will be cleanable when the fluid is changed.

(P.S. see my thread in the SRT Discussion section with pics)

jersturbo · 02-16-2007, 09:51 AM

mine picked up some particles, and is not a weak magnet...and the surface area of the washer size is far more than a bolt end...either way, they do the job

gt5oh · 02-16-2007, 10:28 AM

Anyone know Transmission Bolt Thread Size? *pics here*

jersturbo · 02-16-2007, 02:18 PM

uh...ya, thats what they are supposed to do

...doesn't have to be a super magnet to get the job done

if your looking for the trans, check FSM or something as a start...you'll find the fill plug is rubber, and the drain plug is a hex key pipe-plug style...

...if you call on your dealer parts guy, he should be able to tell you the thread type/pitch, so to cross reference with NAPA, PeP boys, etc.

gt5oh · 03-16-2007, 02:36 AM

ive had no luck finding the size of the bolt, can anyone help?

nvr2loud · 03-17-2007, 08:45 AM

Quote: Originally Posted by gt5oh

ive had no luck finding the size of the bolt, can anyone help?

Shit.... I just replaced my tranny fluid. I should have checked the thread pitch when I had the bolt out. Oh well.....

Maybe just drain your fluid, check the thread pitch on your bolt, and pick up a new bolt that you want for it. Put your fluid back in or put new fluid in if you need it.

ptperformance · 03-19-2007, 01:19 AM

There is really no reason to get one. The majority of all the metal in our trans is non magnetic. The one in the bottom of the trans will catch everything until failure. I wish the few engineers still came on here to talk about this. What I remember is the magnets were made and placed in the spot to where they would do the most good and if they ever did get "full" then it was time to replace the trans anyways (to much has flaked off and its time) hope that helps.

gt5oh · 03-20-2007, 01:40 AM

Quote: Originally Posted by ptperformance

There is really no reason to get one. The majority of all the metal in our trans is non magnetic. The one in the bottom of the trans will catch everything until failure. I wish the few engineers still came on here to talk about this. What I remember is the magnets were made and placed in the spot to where they would do the most good and if they ever did get "full" then it was time to replace the trans anyways (to much has flaked off and its time) hope that helps.

Thanks for the reply..I see alot of people pro and alot of people that say its no big deal on other car forums..

I didnt know about the non magnetic particles that our transmission produces..

I was honestly swayed by these images though

This is from a honda/acura I believe. Its a Spoon Magnetic Transmission Drain Plug Set...

After 1000-2000 miles this is the transmission bolt

Here is the magnetic oil drain bolt