Quote:
Originally Posted by torxxx
I'm going with 4.11 in mine simply because I have 4 or 5 of them laying around my shop. I've seen more 3.9 and 3.54 4EATs fail than the 4.11's. I think it comes down to where the car is driven.
I live in Alaska, so we have horribly cold weather in the winter and most subaru owners up here own them because of the 4 wheel drive and the need for it to get up their driveways. I believe the 3.9 and 3.54s failed more often up here because they are more of a highway gearing vs the 4.11 and 4.44. 4.44 has the tightest gearing so the trans has to actually work less than a 3.54 ratio trans on the same grade of hill as an example. Not to mention the engine working harder also.
Keep in mind, thats just what I've seen being one of the few Subaru mechanics in the town I live in. I have a early 98 Forrester trans on the floor in the shop, wondering if I should swap that out with one of the 4.11's I have so when my trans I just installed fails, I have the 4.44 to go in it. LOL
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For one, 3.54 is only used in the SVX auto's and searching will find all of the different reasons why they fail so much. 3.90 is only a manual transmission ratio or fwd auto ratio from imprezas so they shouldn't be failing. 4.11's don't fail in the cars they are originally in because they are in non-turbo 2.2 or smaller displacement cars that weigh a lot less than an SVX and have much less power and torque. This is why they fail so often when swapped into an SVX. You might get lucky and it might last 20k miles, but I wouldn't expect it to last much longer than that unless you are really, really easy on it.
Just my thoughts...