[BADCUDA1]

Just getting started but wanted to try a picture post since the Photo Bucket crap hit the fan to see if it works through tiny pic. Notice I resized the picture so it wasn't LIFE SIZE! I really hate reading a post that I have to scan side to side. PINR!!!

I choose this Hayden 698 for size and it has an internal devise that is to by-pass the cooler until it has some heat is in the fluid. Cold fluid isn't good either. I will plumb it in-series after the OEM cooler.

Got the cooler itself installed. I have run the lines inside to the engine bay and secured by the battery for the time being. Planning on a full transmission flush and will finish the plumbing then when I drop the pan for inspection. No tranny problems just want to take a look after 94,000 miles.

Cooler positioned nice on the lower radiator support and used the upright to support the top of the cooler. Installing in this position keeps it about an inch off of the a/c condenser. Used fuel injection clamps to secure the transmission hoses. They tend not the loosen and don't cut into the line and offer full circle clamping. I use them where ever I can. Finding a well made Fuel injection clamp is challenging so don't fall for the cheap garbage!



Little more progress yesterday. Added some 3/4 heater hose to the lines to help in areas were chaffing was a possibility. Also added a large ring grommet to radiator core support hole where the OEM cooler lines run through. Next up when time allows jack stands and pull the trans pan for inspection and full flush and with new fluid.





Alright got to finish the install today!
Pulled the trans and found a pretty clean pan for 95,000 miles.


Came up with a low pressure oil transfer pump that I used the pump the fluid back through the cooler return circuit. When I dropped the pan there was about 4.5 quarts that was in the pan when I finished. Hooked up the pump to the return line and reinstalled the 4.5 quarts through that line. Started the truck and let it pump out 2 quart through the cooler feed line. I did 2 quarts at a time. 2 out 2 in until it what was coming out was fairly clean. The 95,000 mile fluid wasn't real dark black. It was dark but still red. I ended up taking out 16 quarts and put in 17 to allow for the new cooler and allow for being able to set the level once I got it up temp. I use the Torque app on my smart phone and can monitor converter and transmission pan temps. Corrected level and road tested about 6 miles and rechecked new connections. All done with the new cooler add-on and flush.

[BADCUDA1]

DONE!

[Mike07SE]

Nice job on that! How is the transmission responding to the flush?

Also, what size is the hose? 3/8" with 3/8" F/F unions used?

[BADCUDA1]

Originally Posted by Mike07SE

Nice job on that! How is the transmission responding to the flush?

Also, what size is the hose? 3/8" with 3/8" F/F unions used?

Sorry just seen your reply. 3/8" I.D. transmission hose and a 3'8" O.D. brass double barbed hose fitting.

The Hayden kit comes with 3/8" transmission line but I don't think enough so I picked up some transmission hose at NAPA along with the fuel injection clamps for the 3/8" line.

Flare fitting unions used ? Not really. Connection made from the lower trans cooler fitting on the radiator to the Hayden cooler then from the other Hayden cooler fitting to the line removed from the lower radiator cooler using the 3/8" brass barbed hose union.

Transmission Flush: Not change but didn't expect any really. Didn't have any problems before. It might be shifting a little smoother haven't driven it a whole lot since. Ambient temperatures have been cooler here but looks like at least 30-35 F degree drop in transmission operating temperature during the heat of the day. I pulled the transmission pan only to take a good look at what was going on @ 95,000 miles. To be honest I have seen worse debris other brands transmissions @ a 30,000 miles service. If yours isn't doing anything funky don't bother pulling the pan. Just do a good flush.

The Hayden 698 cooler is by far the nicest cooler to date I have installed. Design and construction is very good. I believe there is only one size larger cooler they offer. This one was rated for towing 10,000 lbs. The next one down was half the size.

[BADCUDA1]

Finally found the time to take my 206 champion fishing. Cooler day on the way home is was around 78 ambient temperature. The transmission pan never got higher than 156 f. the converter temp high got to 186 f. very briefly. Once in over drive drops to pan temp pretty quick.

[Bluesky 07]

Thanks, OP for the writeup. For anyone here seeking info on installing a Hayden model, I had a couple of questions so I called them and got these answers:

- If mounting horizontally, which is okay per the directions, it doesn't matter whether the incoming fluid flow is into the top or the bottom port.
- The 698's fluid capacity is 1 quart or less, which I wanted to know b/c I'm doing a full drain and fill at the same time I install the cooler.

[Bluesky 07]

Following up in case it’s helpful to anyone considering a transmission cooler, here are my temps after an hour of trail riding today, all in 4WD, mostly 4HI but with some 4LO mixed in. Outside temp was 78 and this is with the Hayden 698 I recently installed.



Here’s how mine is mounted:

[phatcheeks]

Originally Posted by Bluesky 07

Following up in case it’s helpful to anyone considering a transmission cooler, here are my temps after an hour of trail riding today, all in 4WD, mostly 4HI but with some 4LO mixed in. Outside temp was 78 and this is with the Hayden 698 I recently installed.



Here’s how mine is mounted:

Those are some good temps. I have the Hayden 678 but unless im going like 40mph+ it doesnt bring down the temps much. So most off-roading I do my temps get high. Like 190-200. Maybe I need to relocate it or put a fan on it.