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Old 02-11-2002, 08:52 AM   #1
PaulN
Scooby Newbie
 
Member#: 566
Join Date: Nov 1999
Location: Sussex, UK
Vehicle:
1994 Legacy GTB
Green

Smile Auto to Manual conversion successful!

Hi

As I posted a couple of weeks ago, I have just attempted to convert my automatic Legacy GTB to a manual conversion - It worked.

I did all the work myself and it cost 950 ($1400). The transfer box on my GTB was binding so it was like driving with the centre diff locked solid

Now after a week of skinned knuckles and lying in puddles (I can't fit the car in the garage and its rained a lot in the UK this week)

Problems:

One of the torque converter bolts was rounded off and so after removing the autobox I had to attack the TC from behind with an angle grinder!!

Are the downpipes different on the manual - The downpipes and particularly the brackets are hard up against the gearbox mounting - makes a nasty vibration inside the car at low speed. (should be cured by the new scoobysport downpipe next week!

Speedometer - the auto has 2 speed sensors with 2 pin connectors, the manual has 1 3 pin connector - anyone have a wiring diagram for this bit?

Is the footrest smaller on the manual - doesn't seem much room between the footrest and clutch

PLUSES!!

The car is much faster - although the VOD is more noticable - no doubt I will get used to driving around it, but the car just takes off over 5000rpm - I also put a Scoobysport centre pipe and rear box on the car - nice noise, but not intrusive at speed - new downpipe for secondary turbo next week.

I made my own speed shift - reduced overall height by 25mm (Might take it down a bit more) but increase the height of the linkage connection by 20mm (almost double) - nice short shift, abit notchy but I'll get used to it!

Higher gearing in top, up from 22mph/1000rpm to 25mph/1000rpm

Handling much better - car is more stable (possibly due to driving with what amounted to a solid centre diff with the auto).

Parts Changed

UK Impreza Turbo gearbox and rear diff (3.9)
GTB propshaft, 3" longer than auto propshaft
Clutch pedal assembly and master cylinder (+loads of piping???) from GTB
Impreza slave cylinder and clutch
GTB brake pedal
GTB ECU
GTB Starter motor
GTB centre console and gear gaiter/knob


I'll put a full acount with pictures on my website when I get home next week
www.nebbs.com
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Last edited by PaulN; 02-11-2002 at 09:17 AM.
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Old 02-11-2002, 09:36 AM   #2
DLC
out back
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Member#: 1964
Join Date: Jul 2000
Chapter/Region: RMIC
Location: 84XXX
Vehicle:
01 BH
Blue/Bronze

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I'm doing this next weekend in my "GTB" also known as a Touring Wagon in the US.

I've basically got all the parts you're using, save for the stock ECU, which does a fine job. The TCU will just be disconnected and removed.

I've had the parts for a week, i'm just waiting for shop time, it's agony!!!

Dave
Legacy Central
Team ARG
BC-BF LegacyWorks
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Old 02-11-2002, 10:08 AM   #3
PaulN
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Member#: 566
Join Date: Nov 1999
Location: Sussex, UK
Vehicle:
1994 Legacy GTB
Green

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Good Luck (its a fun job!)

The reason I changed the ECU is that the manual has a 7500rpm redline (up from 7000rpm), with different ignition timing and idle speed to the autos.

It also gives slightly more boost than the auto version, I'm now running 1.1bar

Paul
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Old 02-11-2002, 11:11 AM   #4
DLC
out back
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Chapter/Region: RMIC
Location: 84XXX
Vehicle:
01 BH
Blue/Bronze

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Well, our EJ22T is just SOHC and redlines at 6500 in both versions. I have heard about a timing issue, but i'm probably going to add some kind of timing control later anyway.

I'm already using an AVC-R, my limit is not having and intercooler and this tiny RB52.

I am, however, enlisting the expertise of a Subaru mechanic to do the brunt of the really tricky stuff, while i generally get in the way and take pictures.

Dave
Legacy Central
Team ARG
BC-BF LegacyWorks
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Old 04-18-2009, 11:49 AM   #5
bbenson
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Member#: 198744
Join Date: Dec 2008
Default Automatic is problemATIC

03 Impreza with a second auto trans with a blown input shaft bearing... manual tranny is the next step!
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Old 04-19-2009, 10:40 AM   #6
DS1
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Join Date: Apr 2006
Chapter/Region: MWSOC
Location: Schaumburg, IL
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From what I've seen most guys go with the speedo wiring is to grab a manual ecu and run the wiring straight through the firewall.

I just did this swap in my 00' legacy wagon but I swapped the entire bulk head harness to a manual one.

-Dylan @ DS1
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Old 04-19-2009, 12:08 PM   #7
Smoke
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Join Date: Feb 2008
Chapter/Region: NWIC
Location: Cheney, WA
Vehicle:
95 V4 STi-RA swap
Stage 49.8

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Keep these threads coming!
I plan to do this someday myself!!
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