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Old 05-12-2005, 12:24 PM   #1
STinger
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Default 98 RS tranny/diff into 95 L

I'm planning the bits I need for a 98 RS 5MT swap into my 95 1.8 L 5MT. I have just the tranny and diff, no shift linkage, no driveshafts.

I have the following questions:
- can the existing 95 shift linkage be used, or were there changes?
- can the L rear driveshafts be used? I know the 2.2s had different left and right shafts, so is this the same with the RS? Is it a big deal anyway?
- are the RS driveshafts (if I need them) the same spline/size to fit into my rear drum brake hubs?
- Any issues with clutches? I gather the same ones can be used on both L and RS. I'm planning just to use a stock clutch at this time.
- Is a hydraulic conversion a good idea here? Or should I try to convert the RS clutch with my L cable fork, etc.
- anything else to think about?

Many thanks,

Martin
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Old 05-12-2005, 04:05 PM   #2
Matt Monson
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Let's see what I can answer for you.
1.I am unsure, but think so.
2. No, your driveshafts are female and the RS ones are male. I might have a set that will work for you. Let me check.
3. Not an issue
4. Not an issue
5. Do the hydraulic conversion. You will need a new starter in addition to the clutch cylinders, but the '98 tranny is made for hydraulic use.
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Old 05-12-2005, 04:44 PM   #3
Homemade WRX
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1. shifter and tranny design both changed
2. the 93-95 EJ18's had 4.11 gearing so there are minor differences in the diff mount stud length and in the flange that connects the shaft to the diff
3. I believe the open diffs are all innies...lsd's are outies
4. you can use either clutch...see part 5.
5. the hydraulic swap can be done, I preffer my heavy cable clutch as do many many wrx and rs owners who have driven my car. you have feel with the cable
6. I would do a lightened flywheel while in there
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Old 05-12-2005, 06:23 PM   #4
STinger
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Cool, thanks for the info, guys.

1. Can I just use the shifter assembly from the RS? Will it fit the L body mounting?

2. As for the axles, my 1.8 rear is the 3.90 innie (4.11 was only on the 4EATs). The '98 is an open diff, of course, so an innie as well. So my 1.8 driveshafts are male on both ends. I wasn't sure if the length differences were huge enough, but I may just get the RS ones just in case.

5. I was unaware of the need for the starter - what are the differences? Mounting? Pinion teeth? I seem to remember somewhere about stud lengths or bolts instead of studs or vice versa. Is this the issue?

Can the old one be used at all? I just had to get a new starter not long ago, so I'm not relishing having to get another one....
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Old 05-12-2005, 11:04 PM   #5
Homemade WRX
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Quote:
Originally Posted by STinger
Cool, thanks for the info, guys.

1. Can I just use the shifter assembly from the RS? Will it fit the L body mounting?
Yes you can

Quote:
Originally Posted by STinger
2. As for the axles, my 1.8 rear is the 3.90 innie (4.11 was only on the 4EATs). The '98 is an open diff, of course, so an innie as well. So my 1.8 driveshafts are male on both ends. I wasn't sure if the length differences were huge enough, but I may just get the RS ones just in case.
yes you are 4.11:1 the EJ18's were 4.11 in manual...I've done the calculations on mine...you can do the same...get RPM and speed then the known subaru gears available in the given final drives also look up the part numbers and the EJ18 and the EJ22 have different ring and pinion numbers in manual form
also have matched speeds on the highway with my friends 01 RS and we are doing the same RPM with same tire profile...

Quote:
Originally Posted by STinger
5. I was unaware of the need for the starter - what are the differences? Mounting? Pinion teeth? I seem to remember somewhere about stud lengths or bolts instead of studs or vice versa. Is this the issue?

Can the old one be used at all? I just had to get a new starter not long ago, so I'm not relishing having to get another one....
I don't know...
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Old 05-12-2005, 11:19 PM   #6
WRX-ECE
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I just put a 99 drivetrain in my 96 2.2

I changed to the hydrolic system. It's fairly easy, you need the pedal box and hydrolic system from the RS. The nice thing is the whole hydrolic system comes out as one part, no mess no spills, no bleeding

the shifter linkage was different between mine, but the mounting point is the same so they bolt right up.

I didn't change rear drive shafts and the diff went right in, on mine I think the drive shafts were the same as the RS, don't know about 1.8s

Jeremy
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Old 05-13-2005, 02:18 AM   #7
Homemade WRX
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the pre 96's have a different drivetrain all together...tranny was different, rear diff crossmember was different, shift linkage was different, clutch system was cable, and the EJ18's had 4.11 gearing....times were crazy then...little sti bits were thrown into the cars without warning too
out of curiosity what is your reasoning for switching to the RS drivetrain?
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Old 05-13-2005, 03:23 AM   #8
Boxologist
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Quote:
Originally Posted by Homemade WRX
...
5. the hydraulic swap can be done, I preffer my heavy cable clutch as do many many wrx and rs owners who have driven my car. you have feel with the cable...

do u know if the cable clutch is compatble w/ the 6mt, any insight? be a simpler swap if i didn't have swap in a pedal box + hydraulic assembly.
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Old 05-17-2005, 07:35 PM   #9
STinger
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Quote:
Originally Posted by Homemade WRX
the pre 96's have a different drivetrain all together...tranny was different, rear diff crossmember was different, shift linkage was different, clutch system was cable, and the EJ18's had 4.11 gearing....times were crazy then...little sti bits were thrown into the cars without warning too
out of curiosity what is your reasoning for switching to the RS drivetrain?
According to the '95 factory service manual, the 5MT is a 3.90, but who knows. The label on the diff says VA1REF-XG, which doesn't match up with the codes given in the '95 FSM (VA1REE-XA = 4.111, VA1RBF-XF = 3.90, T2=4.111 for EJ22 4EAT). So now I'm confused. I guess I may just have to go count revs just to make sure! Now, mine is a fairly early '94 build, but it's a 95 model year (coupe), maybe they used parts from the '94 bin.

Main reason to switch to RS was to get the 4.111 and a little more punch off the line, but also to get a fresher gearbox as mine is showing the wear and tear on the synchros.
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Old 05-17-2005, 08:13 PM   #10
Hawk296
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HomemadeWRX is right, I did a lot of looking into this when I needed a new transmission. AWD 5 speed 1.8s were 4.11. I beleive they had a mid year change or so. So an early build 95 model (like mine) is a 4.11 (I marked the shafts and counted revolutions, just over 4 rotations of the input shaft equaled 1 rotation of the front driveshafts.) The FWD cars and automatic cars had differnt gearing. I also looked up in parts books, (you can even see it at subaruparts.com) if you look at the trans section, differential gear it even says 4.11. So check into this and verify what you have. If you need a more fresh gearbox, and you have a 4.11 then no need to swap the rear diff as they are both open diffs. Also if you are doing that, then just remove the pivot for the clutch fork on the RS trans, thread it into the other whole, and use your cable clutch's fork, will be much easier that way.

You can use the L shift linkage as long as you swap the yoke off of the old gearbox (pop out the spring pin) and transfer it over. this thing is reversed on the newer gearbox, so either swap to the RS linkage or swap the yoke thingy on the trans to use the L linkage. goodluck.
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Old 05-19-2005, 02:49 AM   #11
TheKryptKeeper
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I'm doing a similar conversion on my 94 L FWD Auto. Do you guys know if I need the crossmember from the RS as well?
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