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Old 01-28-2006, 08:30 PM   #1
Absubtle
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OMGHi2U Ver 6 swap into 98 RS, issues?

As said so, JDM STi Version 6 swap (swap includes engine and trans) into a 98 RS. I am not, so concerned about wiring, but how about the gear ratios? From final drive ratio of the new Ver.6 5-speed to the factory RS diff? I am just needing a baseline whether to look for a rear diff swap or not. The engine/trans swap is happening, just need to know what else I need to account for.

Sure I have searched, I have searched every possiblity of any version of a Ver 6 swap into 98 RS. I know someone is gonna post a thread and flame for not searching hard enough. But this search engine SUCKS!

Help, sure that would be nice. Knowledge, that may buy you a free night of drinking

Absubtle
PA
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Last edited by Absubtle; 01-28-2006 at 08:32 PM. Reason: DoH!
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Old 01-28-2006, 08:38 PM   #2
Ver.III
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Should be a 4.44
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Old 01-28-2006, 09:00 PM   #3
Scoobie Steve
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Yes rear diff needs to be changed out.


Do you have the engine/trans yet? wiring harness? ecu?

You need to ask specifics
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Old 01-28-2006, 09:28 PM   #4
Absubtle
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Quote:
Originally Posted by Scoobie Steve
Yes rear diff needs to be changed out.


Do you have the engine/trans yet? wiring harness? ecu?

You need to ask specifics
It's a customer supplied engine.. so I am debating the issues of perhaps needing to change the rear diff. I dont have the swap engine/trans yet... so I am just preparing.
I was informed that it was a complete harness.. so we'll see.
Yeah, I thank you guys for trying, but, as you and I , both know, it will depend on what tranny shows up.
There are SO MANY absolutes of ratios, etc. I'd rather just start w/ what I KNOW I am working w/.
I bought a 02 WRX ej20 transmission for a customer, and according to sites, showing transmissions part numbers, this was NOT the correct final drive, etc.. But it ended up being correct. The trans number matched the JDM trans sites perfectly.. but the final drive in the 5-speed worked just fine. So you have to use common, mechanical sense.

Absubtle
PA
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Old 01-29-2006, 01:45 AM   #5
blackbart
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Where is the JDM website that has the tranny spec?
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Old 01-29-2006, 06:03 AM   #6
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google search your transmission code (jdm). youll pop with catherine ken.
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Old 01-29-2006, 12:23 PM   #7
blackbart
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That was the first thing I did when I got the tranny, got no results. I did find a chart for the JDM 5MT's while searching but mine is a 4EAT, TZ102YBAAA C5, I searched both with and without the "C5".
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Old 01-29-2006, 01:59 PM   #8
Absubtle
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http://www.northursalia.com/techdocs...rannychart.pdf.

But this site is down right now... So check back later. This is one-of-the-most extensive charts I have ever seen w/ transmission numbers and gear ratios.

Absubtle
PA

PS-OK IT'S WORKING NOW!!!!
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Old 01-29-2006, 04:03 PM   #9
Absubtle
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After searching for most of the day (seems like), I am coming to the conclusion that a 98 RS 2.5l will have a final drive of 4.11 and most likely the Ver. 6 STi 5-speed will be a final drive of 4.44.
SO I guess I need to source an Outback rear diff, Forester XT or get a new ring & pinion.
I went to my Alldata account to converm the 98 RS gear ratios
Absubtle
PA

PS- Or an Automatic 98 RS... that maybe easier. It's listed as 4.44.

Last edited by Absubtle; 01-29-2006 at 05:20 PM.
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Old 01-29-2006, 05:03 PM   #10
blackbart
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Quote:
Originally Posted by Absubtle
http://www.northursalia.com/techdocs...rannychart.pdf.

But this site is down right now... So check back later. This is one-of-the-most extensive charts I have ever seen w/ transmission numbers and gear ratios.

Absubtle
PA

PS-OK IT'S WORKING NOW!!!!
WOW, that is a great site! But the tranny chart is the same one I found on the Rallispec site, I got the specs for my JDM manual but not for my JDM auto.
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Old 01-29-2006, 05:19 PM   #11
Absubtle
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Quote:
Originally Posted by blackbart
WOW, that is a great site! But the tranny chart is the same one I found on the Rallispec site, I got the specs for my JDM manual but not for my JDM auto.
Just PM'd ya... Yeah I realized, AFTER, I sent it that this for manual 5-6 speeds.. Sorry for the false hope. But I will help ya search for them. What year do you think your tranmission is from?

Absubtle
PA
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