Corvid Posted July 26, 2014 Share Posted July 26, 2014 I'm creating a new thread because I feel like this question is pretty buried in the one about my entire swap. I started with a dead 1991 4EAT with 4.11 gears. I bought a JDM 1997 4EAT with 4.11 gears, that came on a japanese 2.5l car. The JDM transmission had a dented in oil pan, so i swapped on the one from the 91. Presslab informed me that some of the years of 4EATs had different depths of oil pans, but I am not able to just compare the 2 I have, due to damage and location. I am looking for any and all comparison info, including stamping patterns, cut-off years, dipstick lengths, etc. Link to comment Share on other sites More sharing options...
idosubaru Posted July 27, 2014 Share Posted July 27, 2014 I am looking for any and all comparison info, including stamping patterns, cut-off years, dipstick lengths, etc. plug around on Subaru's website: opposed forces, it delineates different part numbers/years and is from Subaru. it's worth the learning curve, go play with it. Link to comment Share on other sites More sharing options...
Corvid Posted July 27, 2014 Author Share Posted July 27, 2014 Well, a quick check of opposedforces shows 2 oil pans, 31390AA030 for pre-95, and 31390AA060 for 95-on. I noticed a difference in the mounting flange surface when I swapped the pans on mine, but it looked like an engineering decision to eliminate the rubberized gasket, in favor of flange sealant. Presslab said that the 2 different depths of pans had different depths of filter screen pickups and different dipsticks. I already swapped the dipstick over, but I need to know if I have to once again pull and scrape the oil pan I just reinstalled, so that I don't starve the fluid and bork the "new" transmission. I understand that these 4EATs are supposed to be just as durable and reliable or whatever, as a 5MT, but the level of repair annoyance seems WAY higher. Link to comment Share on other sites More sharing options...
idosubaru Posted July 27, 2014 Share Posted July 27, 2014 (edited) so you have a 97 JDM trans with 91 pan and 97 filter (and therefore pick up). if Subaru was nice - they could get a 91 and 97 transmission oil pan and you could measure the depth difference and see. can your local dealer do that for you? that assumes JDM pans and transmissions are the same, which i would think they would be. I understand that these 4EATs are supposed to be just as durable and reliable or whatever, as a 5MT, but the level of repair annoyance seems WAY higher. by this age/mileage, prior maintenance/history/driving habits become a huge factor and are often largely indeterminate. Edited July 27, 2014 by grossgary Link to comment Share on other sites More sharing options...
Fairtax4me Posted July 28, 2014 Share Posted July 28, 2014 Put the dented one on a flat surface and knock the dent out with a mallet. 1 Link to comment Share on other sites More sharing options...
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