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Old 03-12-2012, 03:39 AM   #1
tairyhesticles
Scooby Newbie
 
Member#: 311614
Join Date: Feb 2012
Chapter/Region: W. Canada
Location: Regina, SK
Vehicle:
1995 WRX
White

Default USDM Transmission for GC8 WRX

I am looking at replacing / updating the transmission in my 1995 WRX, mine is starting to make whining noises in 1st and 4th.
My question is, has anyone replaced their GC8 WRX transmission with something a little newer, and liked it? I am talking mostly about an 04+ transmission, since i've heard they were updated with wider gears to fix the older "glassbox" problems. (Can anyone confirm this?)
Also with a newer transmission, does the rear differential need to be swapped simultaneously, or will the GC8 differential be compatible?


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Old 03-12-2012, 06:51 AM   #2
eg33GC
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Member#: 206851
Join Date: Mar 2009
Chapter/Region: MWSOC
Vehicle:
99 V4
EJ20K RS

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rear diff follows the tran's final drive

the short gears really complement the G. Long 3.90 usdm are going to be noticably slower from 0-100.
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Old 03-12-2012, 08:43 AM   #3
tairyhesticles
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Member#: 311614
Join Date: Feb 2012
Chapter/Region: W. Canada
Location: Regina, SK
Vehicle:
1995 WRX
White

Default

Right on. So what would I replace it with if I wanted to get shorter gears? just another GC8 transmission? Or is there some other transmission that's "optimal"? I've heard people raving about the GC8 RA transmission.
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Old 03-13-2012, 03:09 AM   #4
ciper
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Member#: 15543
Join Date: Feb 2002
Location: san francisco, ca
Vehicle:
90BJ Legacy LS ABS
AWD 946 Rio Red Jpn built

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I vote for using a 98-01RS transmission with 4.11 final drive. The shorter final drive gives great acceleration and since the mechanical advantage is better you are less likely to break gear teeth. The only "issue" is that it is an NA style clutch so you'd need a new slave cylinder (and possibly master if you don't like the ratio)

You can also find the same transmission in some Forester and Outback. I have one for sale but its in California.
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Old 03-13-2012, 09:19 AM   #5
tairyhesticles
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Member#: 311614
Join Date: Feb 2012
Chapter/Region: W. Canada
Location: Regina, SK
Vehicle:
1995 WRX
White

Default

Quote:
Originally Posted by ciper View Post
I vote for using a 98-01RS transmission with 4.11 final drive. The shorter final drive gives great acceleration and since the mechanical advantage is better you are less likely to break gear teeth. The only "issue" is that it is an NA style clutch so you'd need a new slave cylinder (and possibly master if you don't like the ratio)

You can also find the same transmission in some Forester and Outback. I have one for sale but its in California.
I actually have one of those transmissions available to me, friend is parting out an 01 forester. How many km on your transmission for sale? Maybe PM me with details and price.
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Old 03-13-2012, 01:41 PM   #6
ciper
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Member#: 15543
Join Date: Feb 2002
Location: san francisco, ca
Vehicle:
90BJ Legacy LS ABS
AWD 946 Rio Red Jpn built

Default

I think the 01 forester also has the same transmission. It has just under 200,000 kilometers. Never really thought of a price but I am open to offers. I might have the matching clutch parts as well? Ill look
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