October 23, 201312 yr Hey guys, this may have been asked before, but I need coaching on this. I have a 98 Forester with a EJ25D and I want to change my transmission for a 5 spd or 6 spd from an Impreza. I've read about the differential ratios and final gear ratios had to match, so what could my options be?
October 24, 201312 yr If you have a manual trans you can find your current trans ratios here: http://www.northursalia.com/techdocs/trannychart/trannychart.pdf You don't stand to gain much by going with a 3.90 final drive. This would slow off the line acceleration. You may get a slightly lower highway rpm, depending on the 5th gear ratio. The only option you have for better acceleration overall would be a 4.44 final drive. If you have an automagic, any manual trans will be an improvement.
October 24, 201312 yr Author Thx a lot bro, the chart it's really helpful, there few options with the 4.444 Final Gear, ones that caught my attention are the TY752VB6SZ from the 22B Impreza and the TY752VB6EA with Helical LSD, are these fully compatible with mine? its the same year
October 24, 201312 yr Pretty much any Subaru will bolt to any transmission. You will need additional parts and there will be wiring to correct so it's not just bolt in and go. Drive Shaft may be a different length Trans mounts are different This is a pretty labor intensive change if your auto trans is working. If you really want a standard transmission car it may be better to sell your auto and purchase a standard.
October 24, 201312 yr Yhet do bolt up, so if you want to swap a manual you will need along withthe trans: manual transmission crossmember front driveshaft(the rear portion is the same with automatic) matching rear end diff depending on gear. pedal box assembly hydwaulic or cable clutch linkage depending on donor trans you will need the flywheel and the crankshaft bolts that go with it. a forester manual trans will have a 4.444 gear as well. the forester with the automatic (should be a 4.44) as well
October 24, 201312 yr Author oh no, I forgot to mention that I already have an 5SPD MT, i just wanted to know if the swap could be made and if it would make any difference in speed and acceleration, I should have mentioned it before
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