Fluid change on a 68rfe trans

[Simplysmn]

I have a chance to buy some fluid that is Highly talked about but wanted to run it by some of you that might know if this is good or not

{Castrol Transynd ATF } I know they use it in the Allison trans but will it be ok for the dodge trans ?



ANY Thought's Guy's ??????

 

[daverobb]

Do not use anything in you 68RFE except ATF+4. Using any fluid other than ATF+4, in a 68RFE or any other Mopar electronically controlled Automatic can and most likely will cause shifting and torque converter problems. Castrol and several other companies offer ATF+4 formulated fluid.

 

[Scrappy]

From what I have heard, Suncoast doesn't use ATF+4 in their rebuilds, they use Dexron. But I don't know if there are mods done to the transmission during the re-build that facilitate the fluid switch. I wouldn't try to change the fluid to something else unless there was a rebuild involved.

 

[Simplysmn]

well I am at 70,000 and the fluid I am looking at useing is a Higher Quality then reg ATF+4 fluid so while I changed the filter's out I was going to go to a different fluid

 

[daverobb]

Castrol Transynd is formulated specifically for Allison transmissions. It is not recommended for any other transmission and is not a higher quality fluid than ATF+4.

 

[Simplysmn]

Thank you Sir for the correct info

 

[Gumpertz]

Amsoil ATF = Chrysler +4

My 08 2500 has 8Kmi on it (bought in Mar 09), and I just had the original fluid sucked out and refilled with Amsoil universal synthetic ATF, which meets or exceeds the Chrysler +4 specification. So far it shifts the same and sounds the same, but should run a bit cooler and last longer.

 

[TulsaOkie]

i use Amsoil also, 304k and still running great. I have never flushed ive always replaced both filters and do it every 75k or so.....

 

[daverobb]

Amsoil ATF is a universal fluid and not a certified ATF+4 fluid. Use it in any Mopar electronically controlled transmission at your own risk. Only ATF+4 should be used.

 

[Gumpertz]

Certified +4

Amsoil ATF is a universal fluid and not a certified ATF+4 fluid. Use it in any Mopar electronically controlled transmission at your own risk. Only ATF+4 should be used.

Dave, there is no certification process for lubricants. +4 is a published specification, and any lubricant that meets that spec is "certified". It is common for a lubricant to meet more than one specification. Vehicle manufacturers try to scare people into thinking they have to buy the lubricant from them, but the reality is that the car and truck manufacturers do not refine or blend lubricants. They just buy it from a lubricant wholesaler or manufacturer and have their label put on it, much the way other commodities are "OEM branded".



Amsoil ATF is ATF +4, just as much as anything you would buy off the shelf at a Dodge dealer or Pep Boys etc.

 

[daverobb]

Actually ATF+4 is a Chrysler/Mopar transmission fluid formula. Other companies have received licenses to produce ATF+4, Amsoil is not one of them. I have no problems with Amsoil products in fact I use several myself. But universal ATF does not cut it in Mopar electronically controlled automatic transmissions. I have owned and worked on many of these transmissions and have personally tried Amsoil and other universal ATF brands in several of my transmissions. Non ATF+4 fluid can and most often does cause shifting and sometimes slipping problems that disappear when the fluid is changed back to ATF+4. Now of course these problems do not always rear their ugly heads but why push your luck with an expensive and important part of the drive train. ATF+4 is not that expensive and it is readily available, so there really is no good reason not to use it.