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Old 01-16-2005, 04:16 PM   #1
ADE
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1998 WRX GC8 EJ-20
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Default what to do with my 2.5rs engine&trans?

just done the wrx engine&trans swap. what can i do with my old 2.5rs engine&trans?

98 2.5rs engine with engine harness and head gasket problem which is not worth $$$.

98 2.5rs transmission with clutch and flywheel.

they are roughly around 80000km on them.
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Old 01-16-2005, 04:28 PM   #2
RayQuon
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Do you mind telling me where you got the swap done, and total cost?
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Old 01-16-2005, 04:34 PM   #3
tora
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ADE, the engine won't be worth much but you should try contacting TechWorksEngineering in Calgary, they sometimes will buy what you have for a good price. Did you replace the rear diff as well?
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Old 01-16-2005, 04:39 PM   #4
ADE
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do you have their # or web?

no, i didnt put the wrx rear-diff, i am still using 2.5rs rear-diff.
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Old 01-16-2005, 04:48 PM   #5
tony_subaru
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PM'd
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Old 01-16-2005, 05:06 PM   #6
tora
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The rear diffs have a different final drive...I think you need the WRX rear diff if you are using a WRX clutch/tranny/flywheel.

http://www.techworkseng.com/

Or try the local wrecking yards to see if they want it, but most people will pay very little because of the high K's and the engine is not worth much to anyone unless they want to rebuild it.
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Old 01-16-2005, 07:57 PM   #7
ADE
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thanks for the info tora!!!
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Old 01-16-2005, 08:28 PM   #8
Deziwoo
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make a cool coffee table outta it!

just get it cleans and mounted......... slap some plexi glass over it and there you go!

tuner heads coffee table!
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Old 01-16-2005, 08:50 PM   #9
veightkiller
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you can sell it for parts...
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Old 01-16-2005, 10:15 PM   #10
kgb
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You will especially need the rear diff - the WRX tranny has a 3.9 up front, 1:1.1 reduction center diff, and with your 4.11 diff in the back (3.54 expected), you will seriously break something in no time.
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Old 01-16-2005, 11:20 PM   #11
ADE
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oh man....i have to look for the rear diff now.... thanx guys
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Old 01-16-2005, 11:40 PM   #12
tora
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Yes, do NOT drive the car or it will lock on you, or bind, or do something else nasty.
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Old 01-17-2005, 02:34 AM   #13
Wylde Horses
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Quote:
Originally Posted by kgb
You will especially need the rear diff - the WRX tranny has a 3.9 up front, 1:1.1 reduction center diff, and with your 4.11 diff in the back (3.54 expected), you will seriously break something in no time.
Wouldn't it be better to change the front ring / pinion? I guess if it's all put back together this would be a real pain in the rear, but if you have the tranny out already, it should be pretty straight forward, right?
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Old 01-17-2005, 04:23 AM   #14
kgb
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Depends on how what stage the tranny is at - 4.11 with 1:1.1 center reduction diff is a no-no... if he has the 1:1.1 center reduction diff, then it's easiest to put the 3.54 ring on the rear. If he has 1:1 center diff (unlikely), and tranny is not in yet, front diff swap to 4.11 gives a better ratio.
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Old 01-17-2005, 02:32 PM   #15
ADE
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well, all i have done is that i took out the whole 2.5rs transmission to the wrx transmission. the only thing i didnt change is the rear diff. isnt the differences between 2.5rs and wrx's rear diff are the final speed?
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Old 01-17-2005, 03:27 PM   #16
kgb
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If you put in a stock WRX tranny, I believe you have a 3.9 front diff and 1.1 center, which require a 3.54 ring in the rear to make the whole drivetrain run at 3.9. If you can find the 3.54 ring, tear your rear diff down and swap the ring out on the diff. Not sure if the gear from the driveshaft will work but I believe it should.
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Old 01-17-2005, 04:05 PM   #17
poruki
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ADE, You have PM.
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Old 01-17-2005, 07:13 PM   #18
tora
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Some good info on doing an engine swap.
http://www.sportcompactcarweb.com/tech/0403scc_hybrid/
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Old 01-17-2005, 08:14 PM   #19
andys
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Why are you making life complicated? Get the WRX diff from a wrecker and be done with it. Trip out on the LSD.
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Old 01-17-2005, 08:20 PM   #20
tora
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True, rear diff is pretty cheap from the wrecker.
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Old 01-17-2005, 10:57 PM   #21
ADE
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so the only thing i need to do is to find a wrx rear diff and bolt it on to the transmission?
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Old 01-17-2005, 11:09 PM   #22
tora
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Yup, assuming everything else on your swap is cool.
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Old 01-17-2005, 11:13 PM   #23
ADE
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thank you tora!~
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Old 01-17-2005, 11:52 PM   #24
tora
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ADE, why don't you send me a PM and tell me what you've done and I can make sure you haven't missed anything or made any booboos.
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Old 01-18-2005, 02:42 PM   #25
patr
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if you cant find the layshafts to convert the 1.1 to 1.0 we have them here, but its a lot of labour/time intensive... ps there is no such thing as a 'ring gear' in the center diff, its 2 shafts that intertwine, one at 33 teeth, the other at 30. To convert to 1.0, you swap both to be 31 teeth

but the best bet is to get a 3.54 rear diff. If you want to swap the ring and pinion on the rear diff, its also some labour time and the guy who does it needs shim kits etc

the 1.0 conversion makes the car handle better (better torque split f/r)

-Pat
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