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  #1  
Old 03-11-2013, 02:52 PM
davew833 davew833 is offline
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4EAT compatibility

Looking at picking up a cheap '92 Legacy EJ22T Turbo automatic and just wondered if this model had the same 4EAT the '92 SVX had, and thus, the same problems with tranny overheating, etc. It IS a smaller engine and less powerful by about 70 hp if that makes a difference.
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  #2  
Old 03-11-2013, 02:58 PM
Blacky Blacky is offline
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Re: 4EAT compatibility

No it's not the same tranny.
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  #3  
Old 03-12-2013, 11:51 AM
1986nate 1986nate is offline
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Re: 4EAT compatibility

Quote:
Originally Posted by davew833 View Post
Looking at picking up a cheap '92 Legacy EJ22T Turbo automatic and just wondered if this model had the same 4EAT the '92 SVX had, and thus, the same problems with tranny overheating, etc. It IS a smaller engine and less powerful by about 70 hp if that makes a difference.
It's 3.90 ratio and stronger than other Subaru transmissions. Possibly as many friction discs as the SVX transmission, but not 100% sure about that.
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Old 03-12-2013, 12:42 PM
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jetboy jetboy is offline
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Re: 4EAT compatibility

So what are the requirements to fit a tranny to an SVX?

I guess the front part has to mate with the flywheel part, the final drive has to match the LSD and it has to handle the torque?

I have VTD, is that a system that goes with any Subaru automatic or do I need a VTD version?

So far, I'm pleased with the 4EAT but more gears wouldn't hurt. Also, Sportshift was fun. Can I put a 5EAT into my car?
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Old 03-12-2013, 01:05 PM
dragoontwo dragoontwo is offline
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Re: 4EAT compatibility

Quote:
Originally Posted by jetboy View Post
So what are the requirements to fit a tranny to an SVX?

I guess the front part has to mate with the flywheel part, the final drive has to match the LSD and it has to handle the torque?

I have VTD, is that a system that goes with any Subaru automatic or do I need a VTD version?

So far, I'm pleased with the 4EAT but more gears wouldn't hurt. Also, Sportshift was fun. Can I put a 5EAT into my car?
As far as transmissions fitting on the engines, practically any Subaru transmission will bolt up to the SVX. Getting the newer automatics to work properly is quite intensive.
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  #6  
Old 03-12-2013, 03:40 PM
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jetboy jetboy is offline
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Re: 4EAT compatibility

As in TCU input and control?
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  #7  
Old 03-12-2013, 05:54 PM
1986nate 1986nate is offline
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Re: 4EAT compatibility

Quote:
Originally Posted by jetboy View Post
So what are the requirements to fit a tranny to an SVX?

I guess the front part has to mate with the flywheel part, the final drive has to match the LSD and it has to handle the torque?

I have VTD, is that a system that goes with any Subaru automatic or do I need a VTD version?

So far, I'm pleased with the 4EAT but more gears wouldn't hurt. Also, Sportshift was fun. Can I put a 5EAT into my car?
If yours is VTD, you need to use another VTD trans with the same type (normally open or norm closed) C solenoid or if its different, have the matching TCU as well as ensuring the rear diff is the same ratio. All of this, plus needs to be a phase 1 transmission. (in the US, this is 90-98 EJ based Subarus)
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  #8  
Old 03-13-2013, 01:23 AM
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jetboy jetboy is offline
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Re: 4EAT compatibility

Quote:
Originally Posted by 1986nate View Post
If yours is VTD, you need to use another VTD trans with the same type (normally open or norm closed) C solenoid or if its different, have the matching TCU as well as ensuring the rear diff is the same ratio. All of this, plus needs to be a phase 1 transmission. (in the US, this is 90-98 EJ based Subarus)
Could any of these automatics handle power in the range of 310-400nm (in case I ever get money to uprate the engine)?
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