Transmission I.D. numbers - Subaru Forester Owners Forum
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post #1 of 6 (permalink) Old 01-17-2012, 07:44 PM Thread Starter
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Car Year: 1999
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Transmission I.D. numbers

Hello all,

I just replaced the transmission in my 1999 Forester and I noticed that the I.D number on the replacement trans I had purchased was different. Meaning the beginning part of the I.D. number /letter combo started with TZ1B and the old transmission I.D. code started with TZ1A. I was curious what the difference was if any? I asked the local Subaru dealer in my area but they didnít want to bother helping me with my question. So I thought Iíd ask you nice folks.
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post #2 of 6 (permalink) Old 01-18-2012, 04:38 AM
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Hmm, I've only got the list of Manual Transmissions and their differences...

From what I can tell, which doesn't say much... the TZ1A was a pre-03 and after that the Foresters switched to the TZ1B automatic on the Foresters at least.

Did you get any particular info on the transmission when you bought it regarding the car it came out of or the gear ratios?

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post #3 of 6 (permalink) Old 01-19-2012, 08:18 AM Thread Starter
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Car Year: 1999
Car Model: Forester
Transmission: 4AT
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The only info I have on it is, what years it will fit. It bolted up without any issues and works perfect. I was thinking that the gear ratio might be different but it drives great,but other than the drain plug being a torx, I couldnt see any big change. My guess is that its a slightly updated version but with a different part number.
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post #4 of 6 (permalink) Old 03-01-2012, 07:32 AM
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Quote:
Originally Posted by Duderotomy View Post
Hmm, I've only got the list of Manual Transmissions and their differences...

From what I can tell, which doesn't say much... the TZ1A was a pre-03 and after that the Foresters switched to the TZ1B automatic on the Foresters at least.

Did you get any particular info on the transmission when you bought it regarding the car it came out of or the gear ratios?
This info is not correct...my 2004 Forester has the TZ1A trans and it is original
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post #5 of 6 (permalink) Old 03-01-2012, 10:46 AM
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Car Year: 2004
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Quote:
Originally Posted by Duderotomy View Post
Hmm, I've only got the list of Manual Transmissions and their differences...

From what I can tell, which doesn't say much... the TZ1A was a pre-03 and after that the Foresters switched to the TZ1B automatic on the Foresters at least.

Did you get any particular info on the transmission when you bought it regarding the car it came out of or the gear ratios?
Could you share this info? I am curious as to what my final drive is and what to look for in other trans and rear diffs if I decide to change my final drive.

Thanks!
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post #6 of 6 (permalink) Old 03-01-2012, 12:39 PM
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Car Year: 2008
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Try this Transmission ID Chart - NASIOC

His - 08 X Prem 5mt
Hers - 08 X 4EAT
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