I installed the tru-cool from dieselsite last week and have noticed a nice drop in tranny temps. But...I piped the flow to the tru-cool first and then to the stock cooler, then to the tranny.

I was thinking it would be more beneficial to run through the stock cooler first then to the tru-cool, and back to the tranny. What do you think?
To do this I would just reverse the rubber lines that connect to the rigid lines behind the radiator. 10 minute job...I hope.

 

I don't think it would add any more cooling affect either way. IMO. Your done, Enjoy it.
How much did it drop?

 

It wont matter, cooling ability is cooling ability.

 

Im seeing 150* average with no load. Im not unhappy but it would make sense that it would cool more running through the less efficient cooler first then the better one??

 

150 sounds about right to me- I'm seeing about 140-180 with my 6.0 cooler depending on outside temp and how hard I'm pushing her. I no longer see the 200+ though.

 

I think it is recommended to run the Trucool last because it is in the most direct air flow path. The stock OTA cooler is between the a/c condensor and intercooler. When the a/c is used, the warmer air passes the stock cooler, and is somewhat blocked.

 

I agree with Roland. I have mine sitting on my work table and I will run through the tru-cool last. I don't see the point of cooling the fluid, then run it back to the little cooler behind the IC.

 

When I quizzed Brian at BTS, his recommendation is this: run it thru the radiator cooler (OTW) first (if equipped) then the bigger cooler second. He feels that the Tru-cool or a 6.0 cooler is good enough and just pitch the dinky stock cooler all together. He installed my 6.0 cooler in the stock location and I have the OTW lines and never see past 165 degrees pulling a load on a hot day in the Rockies. Just my thoughts. Maybe, Mark K. can comment on this, he's the tranny guru.

 

That may be so. But it would be every so slight of an increase if any measerable.

 

I agree this is the right way to do it.

 

that's how I installed my Ultra Cool from Napa. Leave the line going directly into the stock cooler, run the return line into the aftermarket, come out the other end of the aftermarket to the return line back to the tranny. Wha-La.....instant COOL

 

Thanks guys, thats what I figured

 

If you do it can you post you new temp reading? So when i do mine. Then we will have a actual real life difference between the two.

 

Absolutely. I will probably do it tomorrow and post my results after Fridays drive to work.