Hetdiesel

im thinkin about changing my auto trans oil over to synthetic amsoil and adding a double deep mag-hytec pan. i have electric fan that i am planning on adding also.

Anyone think it will help? Will it need to flush out the old oil??

yellowhemi

Isn't the factory fluid already a synthetic? I was told it was. Did the deep pan when the Trans-Go kit was installed and refilled back with factory ATF.

TexasCTD

Mopar ATF +4 is synthetic and it works great. No real need, imo, to spend the money on Amsoil, but it will work fine too.


No need to "flush". Just drain what you can, change the trans filter, install the DD pan, and refill. It should hold 4 quarts extra. Then get on a schedule where you drain, change filter again, and refill. I do mine every 20K miles.

Don't forget to change that filter!
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Danavilla

Spoke to the local Chrysler transmission tech yesterday who told me that Mopar ATF+4 is 20% synthetic. I too thought it was all syn. Had the "flush" done by them about a month ago. Now the tranny seems to be running hotter.

Dan

TexasCTD

Did they change your filter? "Flushing" can loosen up particles in the transmission and in some cases harm it. Particularly if you didn't change the filter.......which involves dropping the pan. My transmission (DTT) builder recommends not to flush it.

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Danavilla

I let them convince me not to change the filter. May well have been a mistake but if the issue continues they agreed to look into it. Pretty decent service department IMO. We've used it several years without complaint although they just recently began servicing CTDs.

TexasCTD

If I was in your position, I think i'd consider dropping the pan, changing the filter, and refilling.

Hopefully no damage has been done.

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TonyB

Back on topic....
I installed the DD pan 2 years ago. In 110-115F weather, nothing stays cool.

I do notice driving city, the trans pan temp stays constant, and the cooler hot line cools back to pan temp quicker with the DD pan. Basically, the DD pan acts like a heat sink to help stabilize temperatures.

On freeway, after ~20 miles, the trans will start cooling to ~10F lower than it was in city.

Stopping for 1/2hr-1hr the pan will lose ~30-50F.

For towing, and desert use, I like it.

Tony

Ace

Tony, it sounds like you have two temp gauges on your tranny. True?

TonyB

Yup; One in the pan and one in the 'hot' line leading up to the coolers.

Tony

Ace

So what's the biggest delta you've ever seen between them, worst case scenario, say pulling a load on a good grade?

TonyB

After 20 miles or so, on the freeway, the pan and cooler line run within a few degrees of each other, regardless of load.

6% grade at 55-60mph, 3rd or 4th gear, towing the boat or hauling the camper (cabover, slide in), 100F weather, don't see much more than 180F.

The pan really helps with cool down and city driving. i.e. when truck is shut down for a rest stop for 1/2hr-1hr. And, acts like a heat buffer for all the slipping when leaving a stop.

Tony

Ace

Thanks Tony - that's pretty much what I always intuitively figured but never took the time to confirm by installing a second sensor.

The important thing is to get rid of the heat and the DD pan is a great way to do that because you have the added benefit of the four quarts larger sump.