transmission magnet.

[spasm3]

I bought a new dorman transmission pan for the avalanche( 4l60e).
It did not have a magnet in the pan, so i ordered one from rock auto. On factory pans, the magnet is secured to the pan. Should i jb weld (epoxy) the magnet to the pan , or just let it stick? I don't want it sucked into the filter. Would jb weld be the best thing to attach it? Its a small square magnet about 1 1/4 inches square and about a 1/8 inch thick. its an ac delco magnet.

thanks

 

[JC1]

Don't JB weld it. You should have ordered a rare earth magnet, they are much stronger and they won't move around.

Regards, JC.

 

[spasm3]

Originally Posted By: JC1
Don't JB weld it. You should have ordered a rare earth magnet, they are much stronger and they won't move around.

Regards, JC.


Where are those sold? do they maintain gauss when they get hot?

thanks.

 

[kyxtremetuber]

I wouldnt worry about epoxying it down most other manufactures dont

 

[oilboy123]

Put it as far from the filter as possible. The filter does not have strong enough suction to move the magnet IMHO.

 

[Donald]

Get a Magnefine inline filter w/magnet.

 

[Michael_P]

Most neodymium magnets are rated for 248°F. They generally start to irreversibly degauss around 350°F. You will find conflicting temps for degaussing of neodymium though. I ran a materials add on of a cad program to come up with this number. Personally if it were me, I would go with a standard high quality ferrite magnet. I have known of people to adhere a rare earth magnet on the outside of their pan for added material catch, but if it breaks off, would you want a clump of metal dust to release? In this case, I would go with what is time tested.

 

[R80RS]

Don't put epoxy into the transmission. If things come loose you'll have chunks of JB Weld getting drawn into the filter in addition the the magnet.

If it was me, I'd follow the advice above and get a Magnefine filter. If your household is like mine you can use your new super magnet to hold all the kid's stuff to your refrigerator door.

 

[JethroBodine]

You don't need a magnet. If you want one get a magnetic drain bolt. If your magnet will stick to the pan it won't move. The whole magnet thing is overrated.

 

[Jim Allen]

Originally Posted By: Michael_P
Most neodymium magnets are rated for 248°F. They generally start to irreversibly degauss around 350°F. You will find conflicting temps for degaussing of neodymium though. I ran a materials add on of a cad program to come up with this number. Personally if it were me, I would go with a standard high quality ferrite magnet. I have known of people to adhere a rare earth magnet on the outside of their pan for added material catch, but if it breaks off, would you want a clump of metal dust to release? In this case, I would go with what is time tested.


Interesting info on magnets, thanks. If 350F, is the upper limit, I guess we are pretty safe as the trans has more or less turned to slag before that point.

I agree about the magnet outside the filter ( the same argument exists about the magnets that attache to an oil filter) which segues to my other comment that it is preferable to have the magnet in a line filter and upstream of an actual filter element (ala the Magnefine or similar). If the magnet were to degauss, the filter media could catch most of it rather than have it all cut loose in the oil. The pan filter, being at best 80 mIcrons efficiency would let a lot more than the 30 microns in the line filter.

Also, while iron is approximately 51% of the contaminants in the AT, you have that 49 percent that isn't ferrous and approximately 85% of that is under the size that can be caught by the pan filter (<80um), so in my book the best way to go along these lines is a cooler line filter.

 

[oilboy123]

I just changed the Amsoil ATF I had in my trans for 8yrs 85K miles. The Magnifine was pretty clean with some magnetic particles on it.

I use the Magnifine as extra insurance. I forgot to add that I left the magnet out of the pan when I changed the fluid last 8 years ago.