8HP70 Transmission Pan Option

AFMoulton · Jun 12, 2017

PPE Heavy-Duty Aluminum Transmission Pan 14-16 Ram 1500 EcoDiesel

So I was just looking around and came across this, looks good, I don't see why it wouldn't work with a HEMI truck but I am considering doing this soon.......thoughts?

tsielski · Jun 12, 2017

If this pan is deeper than the OEM plastic one, there may be a clearance issue with the stock exhaust crossover on Hemi trucks. If it's deeper, the pan should work fine on Hemi trucks with long tubes, or with the stock exhaust crossover relocated with some custom welding and pipe work and an aftermarket y-pipe.
If the pan is the same depth as the OEM plastic pan, it should work fine on Hemi 8-speed trucks.

AFMoulton · Jun 12, 2017

I agree, but if you could re route that exhaust, which I think should be done anyways, this would be a good way to save money in the long run.

I don't believe in lifetime fluids. LoL

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Hemi395 · Jun 12, 2017

If someone could post a pic of the stock pan/exhaust clearance this might help determine if this pan will fit a Hemi or pentastar equipped truck. I would take the pic but I have the 6 speed...

AFMoulton · Jun 12, 2017

I will run out and take a pic after I'm done with work. Hopefully that will help in this.

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swine · Jun 12, 2017

On PPE's website is shows -

Applications: 2013-2016 Ram 1500 ZF 8HP70 Transmission V6, V8 and Eco Diesel
Heavy-Duty Aluminum Transmission Pan - Ram 1500 (ZF 8HP70) [228053000] - $329.99 : Pacific Performance Engineering, Innovations in Diesel Performance

AFMoulton · Jun 12, 2017

swine said:
On PPE's website is shows -

Applications: 2013-2016 Ram 1500 ZF 8HP70 Transmission V6, V8 and Eco Diesel

Heavy-Duty Aluminum Transmission Pan - Ram 1500 (ZF 8HP70) [228053000] - $329.99 : Pacific Performance Engineering, Innovations in Diesel Performance

Good find sir! 2 Extra QTs of fluid does seem like an advantage for cooling this thing down.

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Hemi395 · Jun 12, 2017

Just keep in mind the heat exchanger will continue to heat the fluid no matter how much it's cooled...

AFMoulton · Jun 12, 2017

Hemi395 said:
Just keep in mind the heat exchanger will continue to heat the fluid no matter how much it's cooled...

True, until I bypass it. [emoji48]

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tsielski · Jun 12, 2017

With 2 extra quarts of ATF, suspect it's deeper than the OEM pan, which would make it iffy to install with the stock exhaust crossover.
The additional 2 quarts of ATF will result in it taking a bit longer for the 8-speed to get up to it's (engineered by FCA) temp of ~185 degrees, but can't see the trans running cooler for two reasons; the heat exchanger on the drivers side of the transmission uses engine coolant to heat the ATF. Also there is a thermostatically controlled valve integrated with that exchanger that won't let the ATF flow to the cooler integrated into the radiator, until the ATF reaches 180 degrees. It is this valve, which even if running a cool engine T-Stat, that won't allow ATF temps to drop.
Eliminating the heat exchanger (and return the engine coolant to the diverter valve), and somehow bypassing that thermo controlled ATF valve so the ATF flows thru the cooler all the time are the only two ways I know of to reduce the operating temps of the 8-speed from the artificially high 183 to 186 degrees and higher.

Hemi395 · Jun 12, 2017

Haha there you go. Personally I think it's asinine to heat up trans fluid. The number one enemy of transmissions is heat. But what do I know

tsielski · Jun 12, 2017

When you do get around to bypassing that heat exchanger, and if you also bypass the thermostatically controlled ATF valve which stops flow to the cooler until 180 degrees, please share what is involved. I don't have access to a lift, or time presently to scope the problem, but it's something that really needs to be done.

AFMoulton · Jun 12, 2017

tsielski said:
When you do get around to bypassing that heat exchanger, and if you also bypass the thermostatically controlled ATF valve which stops flow to the cooler until 180 degrees, please share what is involved. I don't have access to a lift, or time presently to scope the problem, but it's something that really needs to be done.

Will do, there is a guy on here,SyN, who was working on this end of last year, not sure what came of it, but I've been doing some research on how to "work" this issue

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Hemi395 · Jun 12, 2017

I thought I read somewhere bypassing the thermostatic valve sets a check engine light?

AFMoulton · Jun 12, 2017

Hemi395 said:
I thought I read somewhere bypassing the thermostatic valve sets a check engine light?

So I think this boils down to a plumbing issue, if you could re route some of the plumbing to that valve and also the thermostat for the trans, we might be able to salve this problem.

The reason FCA wants to run it that hot is CAFE, just like we have found with engine oil, 5w-20 doesn't cut the mustard(unless you buy the best stuff out there)

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tsielski · Jun 12, 2017

There is a member of another forum, screen name transengineer, who frequents the Turbo Diesel Register, and he commented a while ago in the Eco Diesel area of that forum, that both valves can be bypassed without generating a code. My experience on that form was that he is extremely knowledgeable. He also mentioned that bypassing the ATF thermo valve would take a fair bit of fabrication, but he offered no details.

Syn mounted a larger ATF cooler on the front of his radiator, but that didn't lower his trans temps because of that valve, and the heat exchanger. If he's done anything since then, he hasn't had a chance to post it.

Hemi395 · Jun 12, 2017

Yup it's all about CAFE!

tsielski · Jun 12, 2017

I agree. plumbing. returning coolant to the diverter valve ought not to be a major PITA (but I've been victimized by those words before). Just disconnect the input and output to the heat exchanger and replace with an elbow of some kind. The thermo ATF valve and whatever special connectors are involved is the big unknown.

AFMoulton · Jun 12, 2017

Found this gem, GDE has found a way to bypass the valve in the engine bay. Looking into that now.

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Hemi395 · Jun 12, 2017

Looking at pictures of this pan on PPE's site it looks like theres a step built into the pan for clearance of the exhaust crossover pipe. I don't think there will be a problem with clearance...

8HP70 Transmission Pan Option

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