Trans Fluid

SmokeN 12 ValvE

SmokeN 12 ValvE

Diesel Enthusiast
Joined
Nov 4, 2007
Messages
808
I just found out that when my tranny was installed there was dextron III/mercron put in it, but it already had ATF+4 in the torque converter:banghead:, and one of the fittings on the heat exchanger is slowly leaking so I have been adding Mopar brand ATF +4 to it.

Do I need to flush it immediately?

If so will it be alright to drain the pan, change the filter, fill back with ATF +4, disconnect the return line, and start and fill.
 
The converter should have a drain on it, if you are unsure call whoever did the tranny work and check.
 
Why would you need to flush it, is ATF +4 not compatible with Mercron 3?
 
ATF + 4 can work in Dexron 3 applications. But it's not suppose to in reverse. I wouldn't drain nothing. Just get lubeguard ATF +4 modifier. Just pour a bottle in, and stop worrying about it. That's what most transmission shops do. They fill a Dodge up with Dexron and use the lubeguard modifier. Works great.
 
Phily 911 said:
ATF + 4 can work in Dexron 3 applications. But it's not suppose to in reverse. I wouldn't drain nothing. Just get lubeguard ATF +4 modifier. Just pour a bottle in, and stop worrying about it. That's what most transmission shops do. They fill a Dodge up with Dexron and use the lubeguard modifier. Works great.
Click to expand...

HTS recommended ATF +4. I know either one would work, but I did not know about them being mixed together.
 
jaswright2003 said:
HTS recommended ATF +4. I know either one would work, but I did not know about them being mixed together.
Click to expand...

Ok, I guess were not on the same page. Different breeds of ATF get mixed all the time without nothing bad happening.
 
You must log in or register to reply here.
Back
Top