Trans temp high limit - Page 7 - Dodge Cummins Diesel Forum
3rd Gen. Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect...NO ADVERTISING

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post #73 of 82 (permalink) Old 05-09-2019, 02:46 PM
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I still have a few ideas to play around with like airbox mods, or a 2nd gen manifold, and I had to re check the turbo specs I have, and it is kind of a hybrid in that the IND side is a 52, or 56mm and the EX side is a 82mm with an AR of 89 so maybe it's really set up for low end, and great driveability manners, and the top end air flow suffers thus the high egt's? It might just be a great candidate for a compound setup?


Yeah a second turbo would definitely help. I plan on doing that to one day. Btw Iím still on the stock manifold. Iíve heard people say aftermarket manifolds help. Iíve heard some say up to 200 less on egts. Iím little skeptical of that, but i guess it couldnít hurt to have a higher flowing manifold.


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post #74 of 82 (permalink) Old 05-09-2019, 02:59 PM
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Yeah a second turbo would definitely help. I plan on doing that to one day. Btw Iím still on the stock manifold. Iíve heard people say aftermarket manifolds help. Iíve heard some say up to 200 less on egts. Iím little skeptical of that, but i guess it couldnít hurt to have a higher flowing manifold.


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I have an AFE bladerunner, and it did help, I could immediately hear it on start up the turbo was whistling a better tune and throttle response for sure is better. It's easy to see why when you look at the collector of a stock 3rd gen is just horrible. My egt's actually are not horrible 1100 in the hills 70mph in OD.... as long as I don't goose it, but full honk, and hold it there it really shoots up!

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post #75 of 82 (permalink) Old 05-10-2019, 05:45 PM Thread Starter
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I'm having a DPS exhaust manifold installed next week. I'm hoping it will help some with EGTs while towing. However, I'm going to have trouble comparing with my current setup as my EGT probe is currently mounted in my exhaust brake housing post turbo. I'm having the probe moved to the new exhaust manifold as it comes with pre-drilled and threaded ports for it.

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post #76 of 82 (permalink) Old 05-10-2019, 06:10 PM
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200f less EGTs at WOT are not uncommon with compounds.

Aftermarket manifolds do help, as they're usually stronger, and help support the extra weight of compounds.

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Yeah a second turbo would definitely help. I plan on doing that to one day. Btw I’m still on the stock manifold. I’ve heard people say aftermarket manifolds help. I’ve heard some say up to 200 less on egts. I’m little skeptical of that, but i guess it couldn’t hurt to have a higher flowing manifold.


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Not sure what else you replaced when you installed the AFE manifold, but I'd hazard a guess at new manifold gaskets on a new & unwarped exhaust manifold. Port matching does help, though. Keeps your off idle torque, while avoiding the raised power band so common on large port exhaust manifolds.

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I have an AFE bladerunner, and it did help, I could immediately hear it on start up the turbo was whistling a better tune and throttle response for sure is better. It's easy to see why when you look at the collector of a stock 3rd gen is just horrible. My egt's actually are not horrible 1100 in the hills 70mph in OD.... as long as I don't goose it, but full honk, and hold it there it really shoots up!
Likely not, unless your old exhaust manifold was warped. I suggest MLS gaskets if available for your application. Good move on the planned pre turbo EGT probe re-location. Perhaps leave the EGT probe in the post turbo location after installing the DPS, and compare temps before you move it to the new manifold's 1/8" NPT port?

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I'm having a DPS exhaust manifold installed next week. I'm hoping it will help some with EGTs while towing. However, I'm going to have trouble comparing with my current setup as my EGT probe is currently mounted in my exhaust brake housing post turbo. I'm having the probe moved to the new exhaust manifold as it comes with pre-drilled and threaded ports for it.

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post #77 of 82 (permalink) Old 05-10-2019, 10:49 PM
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200f less EGTs at WOT are not uncommon with compounds.

Aftermarket manifolds do help, as they're usually stronger, and help support the extra weight of compounds.



Not sure what else you replaced when you installed the AFE manifold, but I'd hazard a guess at new manifold gaskets on a new & unwarped exhaust manifold. Port matching does help, though. Keeps your off idle torque, while avoiding the raised power band so common on large port exhaust manifolds.



Likely not, unless your old exhaust manifold was warped. I suggest MLS gaskets if available for your application. Good move on the planned pre turbo EGT probe re-location. Perhaps leave the EGT probe in the post turbo location after installing the DPS, and compare temps before you move it to the new manifold's 1/8" NPT port?


Only 200 less egt ? I would have thought it be 400 or more depending on the set up. And yeah I realize aftermarket manifolds are stronger then the stock manifold and are less likely to crack. But what Iím a little skeptical if they would help much for egts . Iím sure they help some put will it be worth the 450$ plus price tag? I plan on buying one eventually but canít decide if I want to get a 3gen replacement or just go over to a 2 gen since Iím more then likely going to add a second turbo . Iíd hate to have to buy a manifold twice .


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post #78 of 82 (permalink) Old 05-11-2019, 01:24 PM Thread Starter
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I suggest MLS gaskets if available for your application. Good move on the planned pre turbo EGT probe re-location. Perhaps leave the EGT probe in the post turbo location after installing the DPS, and compare temps before you move it to the new manifold's 1/8" NPT port?
I bought a DPS exhaust manifold (CARB legal) based on feedback in this forum. The manifold came with gaskets and they're single layer metal. Do MLS gaskets really make that big of a difference? if so, what brand/source is recommended?

Also, it has two ports for the temp probe. They're at the collector on either side of the partition. I was planning to install it in the location closest to the firewall. Is that the recommended location?

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post #79 of 82 (permalink) Old 05-11-2019, 03:15 PM
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Talking about manifolds and compounds I always wonder why nobody has used a 3rd gen in the upside down position like the 2nd gens. It would put the turbo forward and seems like a lot more room.

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post #80 of 82 (permalink) Old 05-11-2019, 03:55 PM
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WTF have the last several posts to do with trans temp?
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post #81 of 82 (permalink) Old 05-11-2019, 05:47 PM
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oh, and I think my trans runs cooler in that position...
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post #82 of 82 (permalink) Old 05-12-2019, 12:49 AM
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WTF have the last several posts to do with trans temp?


Well I installed my mishimoto trans cooler yesterday and now my temps are down compared to the doorman cooler... does this post count since itís about trans temp ?


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