Just bought a 2nd Generation 1988 Subaru GL 3 door hatchback 4 speed manual transmission with dual range (4 hi, 4 lo) with an EA81 engine. I've been searching this forum, but haven't found alot of info regarding the benefits of swapping my 4 speed manual for a 5 speed? There are alot of posts about swapping an automatic for a 5 speed, but that doesn't help me.
The main reason I'm interested in doing this is I do alot of freeway driving, and I go about 65-70, which puts my rpms in the 3000-3200 range. I know that's not great for the engine, and I want this engine to last. I read on one post where a person said by swapping to a 5 speed, it lowered the rpms by 500 while highway driving. Is that true? I wanted more confirmation than 1 person before considering this. Are the gear ratios the same, or will I be able to be at a lower rpm going 65-70 if I swap to a 5 speed?
What does a swap involve if I'm going from the 4 to 5 speed? I read that they made them in 5 speed with the EA 81 engine those same years, mine just happened to have a 4 speed manual. Can anyone confirm it that's true, Wikipedia isn't always correct. I would think it would be easier to find a 5 speed transmission from an EA 81 than EA 82 if that's the case.....
Thanks for your help and replies!
Edited by 88SubaruGL, 26 April 2014 - 09:35 PM.