So I'm planning to do a full fluid exchange on my Dak's 42RLE to replace OEM fluid with AMSOIL fluid, and I'm wondering if anyone can confirm which of the transmission cooler lines is the return line? Looking at the FSM, it seems like it is probably the line coming out of the passenger side of the cooler that connects closer to the pan, but can anybody confirm this for sure?

Also, how much can I expect a dealership to charge me to do a Quick Learn reset on the TCM? Is there any hope someone may do it for free? Should I make an appointment or just show up?

Finally, does anyone who has done a fluid exchange by disconnecting the return line have any advice? Any weird connectors to have on hand? Size of hose to have handy?

Thanks in advance!

 

Since I have had my fluid exchanged 2 times so far I can answer that.

The fluid comes from the trans on the drivers side hose and flows back to the trans on the passenger side.

Quick learn reset? Just unhook that battery overnight does that same thing, price $0.00

Your best bet is to find a place that has a fluid transfer machine. One side filled with new fluid, empty side for old fluid. they connect it to the front lines and it uses the transmission pump to move the fluid, so its not a high pressure flush. Its as simple as it sounds, Fluid is pumped out of the trans into the machine, and at the same rate the machine pumps new fluid in.

 

welcome to the forum...eimer nailed it. Hope the Hokie is for the Hokie Nation....GO HOKIES!

 

Are you guys sure that the battery disconnect will work for the TCM? I don't doubt that it would clear volatile memory, but I have not seen anything to convince me that it would trigger the TCM to enter quick learn mode. It seems to be a big enough issue with dodge/chrysler transmissions that Amsoil released a service bulletin that explicitly states to use a DRBIII scan tool to turn on quick learn mode, and that disconnecting the battery is not sufficient.

I get the impression that since the viscosity of the Amsoil fluid is quite a bit different from ATF+4 that inducing quick learn mode is necessary for the TCM to make larger and faster adjustments to its settings in order to compensate for significantly different operating conditions. This would be in contrast to what I would think would happen when disconnecting the battery, which seems like it would clear the TCM to factory settings tuned for mopar ATF+4, leaving it in a normal "slow-learn" mode. This I would think could cause erratic shifting (and possibly damage to the transmission) over the extended period necessary to adjust the TCM settings to compensate for the new fluid.

I am, however, not terribly familiar with these transmissions, and this is just my best guess of the situation based on what I have read. Please correct me if this is not the case. It certainly seems like a DRBIII scan tool is the only way to put the TCM into quick learn mode, but I wonder if a quick learn is really necessary or if a plain old reset is "good enough."

And yes, the Hokie is for the Hokie Nation =)

 

not familiar enough with this topic other than the fluid exchange/change part. I do know the battery disconnect works wonders on the PCM.

 

bumpy mcbumpenstein

 

I had to change my trans fluid twice! (in two days) The filter/gasket kit said not to use sealant on the gasket. Of course I knew more than them & a thin smear of sealant is going to help. Right? (I figured they said no sealant because so many people over do it) After a filled my transmission and started the engine the transmission pan was leaking all over! A little more research on the web showed me that the sealant actually lubricates the gasket and helps it slip. (It did look OK all around, but definitely leaked). So I bought a new kit & fluid and re-did the job the next day (sans sealant) No Leaks! So I doubled my cost of the fluid change, but did learn a lesson about following directions.

 

From above post>>>
P.S. That was true of this rubber reusable gasket. If yours is cork or fiber follow the manufactures recommendations.