65rfe 4th gen 6 speed auto xsmn .

[Hemi395]

Well , I just sent my xsmn fluid sample in to Blackstone labs.
47,000 mile FF .
I'm certin the UOA sheet will show the oil was in good shape , it looked pretty good when I drained it .
My owners manual says to change the fluid & filters @ 12 years or 120,000 miles ......unbelievable ! No way I was gonna wait that long

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Yeah when I read that I laughed. Maybe 60000 miles but no way would I go 120000...

 

[Hemi395]

So I did my last drain and fill with C+ about month ago and I swear over the last week or so my trans is shifting even better. C+ is great stuff!

 

[R.L.K.]

So I did my last drain and fill with C+ about month ago and I swear over the last week or so my trans is shifting even better. C+ is great stuff!

I agree 100 %%%% , I never thought my xsmn shifted hard or poorly on the FF , but now that I have 9qts of Redline C + in it there certinly is a difference in the smoothness of shifting especially from reverse back to drive when I'm in a hurry
I can't wait to do a couple more drain & fills , because at 9ea qts I only have the RL C+ in about 1/2 the system capacity.

I plan to do two MH pan drain plug drain & refills with the Redline C+ ( Mabe 3ea drains )

I haven't set a solid mileage interval for the drains yet ....

@Hemi , what was your interval Sir , and how many drains ?
Did you get 8 qts per drain +/-

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[Hemi395]

I agree 100 %%%% , I never thought my xsmn shifted hard or poorly on the FF , but now that I have 9qts of Redline C + in it there certinly is a difference in the smoothness of shifting especially from reverse back to drive when I'm in a hurry
I can't wait to do a couple more drain & fills , because at 9ea qts I only have the RL C+ in about 1/2 the system capacity.

I plan to do two MH pan drain plug drain & refills with the Redline C+ ( Mabe 3ea drains )

I haven't set a solid mileage interval for the drains yet ....

@Hemi , what was your interval Sir , and how many drains ?
Did you get 8 qts per drain +/-

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Unfortunately I didn't really record mileage between drain and fills. I should have but didn't. I changed my fluid to c+ and the MH at around 22k. Did my first drain and fill around 24k(I think) which was December then winter set in. Did my last one at 28k in May. So I've done 2 drain and fills since putting the MH pan on. Each time I got about 7 quarts out. I put 7 back in and it was about halfway to the hot mark on the dipstick at 130* which is normal operating temp for my truck. No lie, it shifts better now that the day I brought it home with 19 miles on it. Didn't do much for overall temps but cold shifting and overall shifting are MUCH better than the FF. Extremely impressed with c+.

I've noticed that too, going from D to R or R to D, it engages a lot quicker.

 

[novelmike]

With normal everyday driving trans temp being 130-140's, what is considered "hot" while towing?
220?
And if my trans is getting hot, what is the best way to get the temp down? Pull over and idle in neutral, in park, or turn the motor off and wait?

 

[Hemi395]

With normal everyday driving trans temp being 130-140's, what is considered "hot" while towing?
220?
And if my trans is getting hot, what is the best way to get the temp down? Pull over and idle in neutral, in park, or turn the motor off and wait?

220 is way too hot for a RFE transmission IMO. However if that should happen, pull over and idle in neutral. That keeps the pump going and circulates the hot fluid through the cooler.

If the trans is getting that hot you would need to install an auxiliary cooler.

 

[R.L.K.]

Agree with Hemi ^^^^^^^above !

To add to what hemi said , if you tow often and get the 220 ° as normal you should install a Mag-Hytec extra capacity pan with drain plug and use Redline C+ ATF Fluid . Then consider an annual drain & refill .

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[Hemi395]

R.L.K., are you doing your annual C+ drain and fill in the spring or fall? Do you think it's better to have a fresh fluid infusion before summer or before winter?

 

[R.L.K.]

R.L.K., are you doing your annual C+ drain and fill in the spring or fall? Do you think it's better to have a fresh fluid infusion before summer or before winter?

I plan on my annual drain to be late spring due to the winter time low fluid temps collecting more condensation than summer temps .....that's just me though , cause I believe condensation will collect in either situation due to my xsmn temps will likely never get above 212°f to aid in burning off water .....

which brings me to a question Hemi , ....the engine has a PCV for a vent and to expell gasses from things like condensation burn off out of the oils crankcase .......where does the xsmn expelled these gasses ?

If there's no vent then the xsmn would incur condensation each time it heats up to above ambiant temp , then a natural cool down .... ( like air in a sealed jar ) condensation is like majic LOL !

I Assure you each time we drive our trucks and the temperature inside the xsmn gets above the OAT / Outside Air Temperature , and then we shut it down as we walk into work , the xsmn cools .....this creates condensation internally to the xsmn ....where does the xsmn vent to the atmosphere?
Hmm ?

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[Hemi395]

I plan on my annual drain to be late spring due to the winter time low fluid temps collecting more condensation than summer temps .....that's just me though , cause I believe condensation will collect in either situation due to my xsmn temps will likely never get above 212°f to aid in burning off water .....

which brings me to a question Hemi , ....the engine has a PCV for a vent and to expell gasses from things like condensation burn off out of the oils crankcase .......where does the xsmn expelled these gasses ?

If there's no vent then the xsmn would incur condensation each time it heats up to above ambiant temp , then a natural cool down .... ( like air in a sealed jar ) condensation is like majic LOL !

I Assure you each time we drive our trucks and the temperature inside the xsmn gets above the OAT / Outside Air Temperature , and then we shut it down as we walk into work , the xsmn cools .....this creates condensation internally to the xsmn ....where does the xsmn vent to the atmosphere?
Hmm ?

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Makes sense to me. That's what I'm going to do. Plus it'll be fresh for the summer heat.

There is a vent tube on the top of the transmission so it does vent to a degree. But I agree, there's no "pumping" action like there is in the engine to expell the moisture from the transmission case. It's simply whatever air movement comes from the turning gears. Even more reason to do an annual drain and fill IMO

 

[R.L.K.]

I agree my friend !

I knew there was a vent (had to be ) or seals would just BLOW LOL ; however, I've yet to put my hands on it ....

I kinda wish it was like the coolant system with an overflow tank that keeps the system air tight with a "P" Trap so to speak ....

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[R.L.K.]

Hmm , that wouldn't work HA HA , as it would trap moisture ..AKA condensation.

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[U&A]

Hmm , that wouldn't work HA HA , as it would trap moisture ..AKA condensation.

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I have always wonderd were the vent is. My ranger had a little pipe about the size of a brake line and when the tranny got hot and fluid expanded it would drip. I know this as i did a flush and they over filled it. A hot day made it drip out.

 

[R.L.K.]

Today I hauled 6750 lbs of rock .
I was using a rented hydraulic dump trailer that weighs a bit over 3,000 lbs , on the biggest load I had 4,500 lbs of rock , so about 7,500 lbs total weight .

My truck 2014 Ram 4x4 1500 5.7L & 6 speed auto 65RFE Xsmn , 355 differentials , I do have the Mag-Hytec extra capacity xsmn pan (approx +1.5- 2 qts) filled with Redline C+ATF .

I'm in NE TENNESSEE , pretty hilly , my normal driving no load my xsmn oil temps on a 85-90° day is about 130-140° , today pulling the load of about 7,500 lbs for about 40 miles my xsmn oil temp while stopped got as high as 167° , but while driving & utilizing the oil cooler with Ram air the temps were just above normal @ 145 - 150 ish ° , not bad imo .

FYI when I was stopped at road construction for about 10 mins the temp went from 150° to 167° while I was in park ....I shifted to neutral in an attempt to get the fluid moving to cool it off , but it didn't drop at all ( 2 mins approx) , I then shifted to Drive , and the temp dropped pretty quickly to 160°

I didn't get a picture of the highest temps , but here's one I did take .
And a few other pics as well .

The truck pulled the 7,500 lb load like a champ , even up a couple decent uphill grades ..very happy with it , but I do wish I had 410 -456 diffs .

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[U&A]

Today I hauled 6750 lbs of rock .
I was using a rented hydraulic dump trailer that weighs a bit over 3,000 lbs , on the biggest load I had 4,500 lbs of rock , so about 7,500 lbs total weight .

My truck 2014 Ram 4x4 1500 5.7L & 6 speed auto 65RFE Xsmn , 355 differentials , I do have the Mag-Hytec extra capacity xsmn pan (approx +1.5- 2 qts) filled with Redline C+ATF .

I'm in NE TENNESSEE , pretty hilly , my normal driving no load my xsmn oil temps on a 85-90° day is about 130-140° , today pulling the load of about 7,500 lbs for about 40 miles my xsmn oil temp while stopped got as high as 167° , but while driving & utilizing the oil cooler with Ram air the temps were just above normal @ 145 - 150 ish ° , not bad imo .

FYI when I was stopped at road construction for about 10 mins the temp went from 150° to 167° while I was in park ....I shifted to neutral in an attempt to get the fluid moving to cool it off , but it didn't drop at all ( 2 mins approx) , I then shifted to Drive , and the temp dropped pretty quickly to 160°

I didn't get a picture of the highest temps , but here's one I did take .
And a few other pics as well .

The truck pulled the 7,500 lb load like a champ , even up a couple decent uphill grades ..very happy with it , but I do wish I had 410 -456 diffs .

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Happy to hear another good redline c+ atf experience. The "put it in neutral to cool the tranny" thing has never worked for me either.

And when i saw them load it like that i would have been like" wtf? You couldn't dump the gravel in the MIDDLE of my trailer?" LOL THEY favored one side heavily.

 

[R.L.K.]

Yep , I wasn't to happy with the loader .. the trailer is rated for 9300 lbs so it didn't make a difference as far as I could tell .

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[R.L.K.]

Couple more pics .



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[R.L.K.]

Here's a copy of my UOA , of my 65RFE XSMN with 47k on the factory fill



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[Hemi395]

Went on a 600 mile trip over the last few days and I am impressed by how cool my trans runs in 80+ degree heat at 70+mph. This is about where my temps hovered the whole time. This is about 7 or 8 degrees cooler than it has run in the summer on long trips before the MH pan and Redline C+.

I did notice that when I had the AC cranked up my trans temps creeped up to the high 140s but immediately came back down when I turned the AC off. I'm assuming this has to do with the trans cooler and AC condenser being an integral unit and the extra heat from the AC condenser is bleeding into the trans cooler.

If I was going to tow heavy in the summer I would definitely be looking for an auxiliary cooler and probably just bypass the factory cooler.

 

[R.L.K.]

Great information Sir !

I've got about 1500 miles on my Mag-Hytec pan & Redline C+ , I plan @ 2k on the fluid to do a pan drain & refill with fresh REDLINE C + , in an attempt to get 100% c+ in my xsmn .

I'll likely do another drain & refill in another 2k .

How many times have you drained and refilled since your initial RL C+ service with the MH pan ?

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