Here's the official info about +4 from Chrysler itself. Note they say the service life is NOT longer, so where some people are getting that info is probably questionable. Read the official TSB and make your own decision as to what you should or shouldn't run in your trans. The specific TSB below is for my Jeep, but that doesn't matter...the +4 info is the same for any Chrysler product. The bottom line is if your trans uses +4 (or came with +4), it should stay with +4 for the numerous benefits described within the TSB.
1997 Jeep Truck Wrangler L6-4.0L VIN S
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A/T - ATF Usage List
NUMBER: 21-004-04
GROUP: Transmission
DATE: March 16, 2004
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 21-006-01, DATED JUNE 29, 2001, WHICH SHOULD BE REMOVED FROM YOUR FILES. THIS IS A COMPLETE REVISION AND NO ASTERISKS HAVE BEEN ADDED TO HIGHLIGHT REVISIONS.
SUBJECT:
Automatic Transmission Fluid Usage ATF+4 (Type 9602)
MODELS:
NOTE : This bulletin applies to all transmissions manufactured by Chrysler except for 1999 and earlier minivans with the 41TE/AE transmission. This Service Bulletin DOES NOT apply to all AWD transmissions, Sprinter transmissions, Crossfire transmissions and WG bodies equipped with a W5J400 or NAGI transmission (sales code DGJ).
DISCUSSION:
A new transmission fluid (ATF+4(R) - Type 9602) has been developed and is being used as factory fill for all vehicles with Chrysler automatic transmissions. It is recommended that all vehicles with Chrysler automatic transmissions EXCEPT FOR THOSE LISTED ABOVE be serviced with ATF+4(R).
NOTE :ATF+4(R) must always be used in vehicles that were originally filled with ATF+4(R).
NOTE :Service intervals do not change. The service interval currently in effect for a given vehicle should continue to be followed.
NOTE :ATF+4(R) is compatible with ATF+3 and ATF+2. ATF+4(R) can be used to top off vehicles that currently have ATF+2 or ATF+3. Do not use ATF+2 or ATF+3 to top off vehicles that have ATF+4(R) fluid.
BENEFITS
^ Better anti-wear properties
^ Improved rust/corrosion prevention
^ Controls oxidation
^ Eliminates deposits
^ Controls friction
^ Retains anti-foaming properties
^ Superior properties for low temperature operation
FLUID COLOR
Mopar ATF+4(R) is a World Class Fluid having exceptional durability. However, the red dye used in ATF+4(R) is not permanent; as the fluid ages it may become darker or appear brown in color. ATF+4(R) also has a unique odor that may change with age. With ATF+4(R) fluid, color and odor are no longer indicators of fluid condition and do not support a fluid change.
PARTS REQUIRED:
POLICY:
Information Only
Disclaimer :This bulletin is supplied as technical information only and is not an authorization for repair.
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