Greetings - we have a '98 Plymouth Voyager with the Mitsubishi 3.0 V6. I had the automatic transmission rebuilt about 15K miles ago and figure it's time to exchange some old fluid for new. I have been trying to figure out which AT fluid I should use. As I have a 1998, it appears to be a pivotal year. Some websites recommend that if it's older than 1998, one should use ATF +3. Yet I have also read that ATF +4 is the stuff to use as it supercedes ATF +3.
Any recommendations as to which fluid I should use? The manual says ATF +3 7176.
I have read to use what the manual recommends, but I have also read that ATF +4 is better replacement.
Can any Chrysler owners set me straight?
======= taken from »www.allpar.com/faq.html
39. What kind of transmission fluid should I use?
Use ONLY what it says in your owner's manual to use. Many Chrysler
transmissions are NOT compatible with standard fluid! ATF+3
is usually the best one to use with automatic transmissions before
2001, ATF+4 after.
THIS IS AN IMPORTANT and very misunderstood issue.
You should really visit »www.allpar.com/fix/trans.html
if you have
a four-speed or five-speed Chrysler automatic. Even most three-speed
automatics are required to use ATF+4.
=========== from »www.allpar.com/fix/trans.html
What type of fluid to use? (more details) - ATF+3 vs. ATF+4
Dennis Williamson wrote that Chrysler 7176 / ATF+3 fluid is no longer the only fluid to use in a late model transmission. Chrysler TSB# 21-006-01 notes that all current vehicles only use ATF+4 type 9602, part 05013457AA (for quart bottles). The advantages of ATF+4 over +3 include:
* Better anti-wear properties
* Improved rust/corrosion prevention
* Controls oxidation - eliminates deposits
* Superior low temperature operation
* Maintains its friction properties over time
While others make additives that claim to meet the ATF+3 requirement when added to Dexron, extensive information on Chevron's Web site shows that the two leading additives do not meet the standards.
You can use ATF+3 with all older Chrysler transmissions (except as noted below - some Jeeps). ATF+4 is another story. This is from a Chrysler engineer:
If there is a doubt about which grade of ATF to use, follow the owners manual recommendation. AFT+4 in certain specific tests was shown to be incompatible with certain seal material. This incompatibility may cause a premature failure depending on the duty cycle of the vehicle. The fluid will work as intended however, it may cause a seal failure. (Thanks, Scott Brown, for tracking down that engineer!)
Rich Hutchinson wrote: [In 1989-91] both the manual and the dipstick said Dexron was okay, which is wrong. For non lockup 3 spds, either can be used. For lockup 3 spds up to some date in 1999 either could be used but ATF+3 was prefered. After that date ATF+4 is to be used in all automatics.
The best bet for transmissions made before 1998 is to just use ATF+3. Even if it's not needed, it's better than Dexron.
Remember - when you change from Dexron, also retrain the computer and "flash" the computer memory (if applicable).