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Trans Fluid Question

Rocco715

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Rocco715 Enthusiast

Rocco715

Posted
Posted

So, I'd like to eventually upgrade my stock transmission pan to a Mag Hytec and then make the switch to either Amsoil or Royal Purple fluid. My question is do I need to have it professionally flushed to fill the entire trans with one of them or is there a way I can drain it entirley myself? Or should I just drop the pan and replace what fluid was lost with either of the two? Also does anyone know the capacitys for the 4L60E, for both dropping the pan and a dry fill?

 

Thanks, Rocco

xsports33 Enthusiast

xsports33

Posted
Posted

is this for the 2007 truck in your signature? If so, i would stick with Dex VI and just replace the fluid that is lost when you change out the pans and filter. Also, with the Mag-Hytec you're going to be holding 2-3 quarts more than usual

sillyazz Enthusiast

sillyazz

Posted
Posted

4.5 TO 5 Quarts when dropping the pan and filter.

12 to 12.5 Quarts dry thats if there nothing in the torque converter or the cooler and lines.

cmoore74 Enthusiast

cmoore74

Posted
Posted
Your money would be much better spent on an External Tranny cooler....IMO

 

+1 on the cooler

 

The dexron VI is a synthetic tranny fluid. No sense in switching it out unless it was the old dino fluid.

jnpaddison Enthusiast

jnpaddison

Posted
Posted

so, if you already had the factory trans cooler line - a deeper trans pan may not give much benefit apart from the 'wow' factor - ( the DIC can keep track of the fluid temp ) - what is the operating temp of the fluid ??

cmoore74 Enthusiast

cmoore74

Posted
Posted

Depends a lot on ambient temperature and if you're towing or not.

 

What I've seen on a hot Summer day (90-100 deg F):

- Not towing around 120-160 deg F.

- Towing my 4000 lb boat around 170-190 deg F.

 

I have the stock cooler.

 

I woudn't get nervous unless you're seeing temps over 200 deg F on a regular basis. If you are seeing high temps a bigger cooler might be a better choice than the finned tranny pan.

C & A s Dad Senior Enthusiast

C & A s Dad

Posted
Posted

I would agree with Chris here. I see you live in Detroit so you get some pretty low temps in the winter months. If you have a fact ext trans cooler, you should be fine especially with the Dex VI syn fluid. If you do not have the fact cooler, I would recommend adding one. If you do have one and you see temps in the 200+ range while towing, you may want to upgrade your cooler to one size larger, say 11 x 7 x 3/4 instead of the 11 x 5 x 3/4 just be sure and use the same stacked plate design. I would not go any larger because you would likely be overcooling your fluid on those single digit temp days.

 

Also, if you do choose to add the deeper pan, take a look at PML. They offer a pan that adds 2 qts and still clears your exh crossover pipe.

 

If you want to do a complete Flush at home, Amoil's website offers a good step by step piece on how to do it. It has also been posted on this forum several times. You may can find it in a search.

Rocco715 Enthusiast

Rocco715

Posted
  • Author
Posted

Thanks for the reply's guys. Mainly i'm doing the mag hytecs for the trans and differential for sake of having them and appearance not so much as being concerned with bringing the temps down. and since I was going to have the stock ones of I figured I might as well go with some high performance synthetics just to extend the service intervals.

xsports33 Enthusiast

xsports33

Posted
Posted

the deep transmission pan isn't going to drop your transmission temps much. A larger auxillary cooler is a much better investment for cooling. The deep pan will give you more volume so it will take longer to heat up, but by the same token it will take longer to cool down as well, if you reach high temps.

Westlotorn Enthusiast

Westlotorn

Posted
Posted
So, I'd like to eventually upgrade my stock transmission pan to a Mag Hytec and then make the switch to either Amsoil or Royal Purple fluid. My question is do I need to have it professionally flushed to fill the entire trans with one of them or is there a way I can drain it entirley myself? Or should I just drop the pan and replace what fluid was lost with either of the two? Also does anyone know the capacitys for the 4L60E, for both dropping the pan and a dry fill?

 

Thanks, Rocco

I avoid the Flush route offered by the fast lube places. I really thought they were a great idea and did it to both my 59,000 mile Denali and a 145,000 mile 1995 Suburban. Both had tranny failure within the next 5,000 miles. Each tranny cost me close to $1500 and I installed them. The Tranny rebuilder explained that the 4L60E has many small filter screens and the pressure flush stirred up the stuff from the pan and filter and plugged many of these causing my failure. I am not a tranny guy or expert but I believe in avoiding things that have burned me in the past. If you wish to flush I would change the filter and clean the pan first.

Each of my 4L60's took around 12 qts with the tranny install. This falls to 5 or 6 qts if you just drain and replace the filter but can't drain the torque converter. Good Luck

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