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What kind of mpg's should a 1996 OBW 2.5 get?


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Look @ the bottom of this page and you'll see a list of Similar Threads. A couple may be relevant now that we have your trans ID.

 

Also, go to OpposedForces.com, click the Subaru Parts catalog link, select your Model>>Year>>etc and it shows the similiar part #'s under the AT info HERE.

 

For Legacy Outback 2.5:

 

TZ102Z2ABA

'94, November — '96, June

 

TZ102Z2CBA

'95, December — '97, July

 

TZ102Z2DBA

'96, July — '98, May

 

 

TZ1A2ZJEBA

'97, October — '99, May

 

For Legacy GT 2.5:

TZ102Z2AAA

'94, November — '96, June

 

TZ102Z2CCA

'95, December — '97, July

 

TZ102Z2DCA

'96, July — '98, May

 

TZ1A2ZJEAA

'97, October — '99, May

 

For a Forester '98-'02 :

TZ103ZJ1AA

'96, November — '98, June

 

TZ1A3ZC2AA

'98, March — '99, June

 

TZ1A3ZC2AA

'99, April — '99, December

 

TZ1A3ZC2AA

'99, September — '01, February

 

TZ1A3ZC3AA

'00, December — '02, February

 

Looks like a Legacy GT....they had smaller/shorter tires 195/60-15 (in '96) vs. the 205/70-15 on the OB , and I'd bet the ratios in the trans are different - I know the 5th gear ratio in the 5-speeds on the OB is different than the GT, to make up for the taller tires??.

 

TD

Edited by wtdash
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Is there any way to see the ratios of the two and compare? This is making sense though, if it was made for smaller tires, then the engine would be laboring more with the bigger tires, dang, so now what, put on smaller tires, :(

 

Thanks for the info

Edited by weldersd
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ok, so I have the service manual, it's showing some differences with the outback version vs the legacy, it's in pdf so this forum won't let me attach it. here's the differences I see, (legacy 2500cc vs outback 2500cc)

 

TC: Stall torque ratio 1.8-2.0 vs 2.2-2.4 stall speed: 2200-2600 vs 2400-2800

 

Transmission: clutch number for reverse and low 6 vs 5

 

that's the only differences I can see per the legacy 1996 service manual.

 

-one more clutch in the low clutch pack, why?

 

stall speeds for TC different, Can I just put the old TC in?

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For what it's worth:

ratios.gif

 

(From "High-Performance Subaru Builder's Guide" by Jeff Zurschmeide)

 

EDIT: Hold the press!

I just found a nice table on my ('99) FSM, and it shows:

w/ 2.2 engine: 1st: 2.785 - 2nd:1.545 - 3rd:1.000 - 4th:0.694 - R:2.272

w/ 2.5 engine: 1st: 3.027 - 2nd:1.619 - 3rd:1.000 - 4th:0.694 - R:2.272

 

The equivalent pages for the '95 show only the first set of ratios.

Edited by jarl
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OK, I think i'm on to something. the service manual shows the speedo gear ratio for non-outback at .83 and .76 for outback model, so I just went on a approx 6mi trip with my garmin gpsmap 76 and I got the following readings: when the car speedo shows 60mph I was traveling approx 63.5 mph according to gps. after a 6 mile trip the car odom read 5.5 mi I divided 200/6=33.3, then .5x33.3=16.65 so at 200mi my car odometer should read approx 16-17 more miles than it is, this would bring us back to pretty close to our original pre-trans swap numbers. so that's good, now the only question remains why the extra clutch plate in the low/reverse clutch brake? I wonder if it has to do with the increased stall speed on the TC? Now that I found out the TC on the new trans has a lower stall speed, I now notice it, definitely engages much sooner.

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