rlme36

Thanks for the reply. Are these bolt on or one of those "some assembly required" kind of deals?

Where are you getting headers from? I

Thanks for the thread it started me looking for a proper adapter. I also used the logic that if the 2016 diesel version fits in the gas version, by extension a PPE Part 124064000 should also fit, since they state its a drop in fitment for the 2015-2016 trucks. i have noticed the 2017 has a diff part # compared to the 2016 re factory coolers and believe the diff is how the connection is clocked. the 2016 seems to face directly out and one that's parallel with cooler. The 2017 based on rockauto shows one facing at a 45 to the front and one parallel. Either way i think i've come across some potential adaptors, one in theory shouldn't need any more space to fit the other I'm not sure how big it is. I've come across an adapter for a Chrysler part # 52119547AA or dorman part # 800-723 that appears to have the correct quick connect and the correct male threads. According to the diesel version of the quick connector on dorman its a 7/8-14 thread male which is what started me down this path. The gas version is a 3/4-16 male thread on the quick connector for the cooler lines. another adaptor that came up was a Lawson Products 7/18-14 x 3/4-16 hydraulic reducer adaptor which should allow to reuse the gas quick connector and this part to connect into a diesel factory or upgraded aftermarket unit. I haven't yet ordered the above parts to validate, but was going to start with the Diesel vs the chyrsler part number. to ensure the threads are the same. Hope this helps. for the ~$200 for the factory part i'd rather spend the added ~150 on the PPE version. rob

Any specific reason to remove the Blackbear tune or just the new mods are more than the tune can do?

So the duramax diesel version of the oil cooler has the line attachments in the same location as the 6.0L with the only difference being the connection size, thats a great bit of information, thank you for posting. Do you have the part # handy or is it just 2017-2019 diesel transcooler and it will pop up?

Agreed, heat is the enemy. I've already had the trans flushed by dealer with fresh fluid, more a function of my OCD and establishing a base line for powertrain warranty. If i go with a better oil product, no issue going that route either as i use Redline oil in most things, but unsure if GM will warranty using that product, but will look into it just the same.

I've towed with it a few times thus far, using an open car trailer. My question really comes from previous experience of trying to keep the temp as low as possible and the future upgrade to an aerodynamic brick of an enclosed car trailer. I may be over thinking it, but that's kind of the point. I'd rather err on side of over built vs. under. Appreciate the feedback Big Whiskey.

Still looking into this. the way i'd like to approach this is at least getting a fitting that goes into the factory lines without having to alter etc. Then I'll just use whats need to plumb into a good universal unit. Anyone know of a fitting that works?

Thanks for the response, that is very useful/interesting information. The other part for me is that I anticipate using this to haul an enclosed car trailer vs. an open car trailer, figured it would need the added cooling, but seeing that its right at factory spec, perhaps I'll wait and see how well it does in stock form. Maybe they did get it right

This could be a case of me over building something/fixing something that isn't broke. On a tow this past summer I saw Trans temps ~200deg F and figured i'd look into upgrading the trans cooler before I need to tow again. I've searched and it doesn't seem to be a unit that is made for the 2016-2019 2500HD gas trucks. Is it because GM actually got it right the first time or not enough demand for aftermarket to bother? I realize the trans temp can go higher, but I've always gone with the assumption you can't really over cool the transmission fluid. Thanks, Rob

First tow with the new rig.

I haven't driven the truck since the tires and wheels were balanced, but did install the new bilstein shocks in it. Will get the drive impressions this weekend on a trip up to the track. I can tell you this though, the front shocks were shot and the rears still wanted to re expand on compression, but very slowly. Truck has ~42K on it. More than likely not your issue if the truck is new, but just giving data points for those that are approaching that kind of mileage.

My dealer said the spec was 30 or less for LT tires. Discount tire said that anything close to 30 can cause slight vibration. DT said on the last tire they sent me it was 8, but using their wheel. So one has to wonder how much the factory wheels contribute to the variance. The end result of that last tire with my factory wheel was 21 RF.

interested to hear/learn more about these. Seems like short money to make all the tire vibe issues people are having go away.

Well, got the last new replacement tire installed today to swap out the 34 from the RR, the new RR value is 21 road force. I do feel a little something, but its much better than it was in the beginning, amazed at how sensitive these trucks are to RF values. Will use the truck for a long tow in a few weeks, which will hopefully go without issues.