28 replies to this topic

[K33P_UP]

Hey all,

Not sure if this has been covered, but are there any differences between evo 1, 2 and 3 transfer cases? Are there also any differences in running gear ratios like gearbox and rear diff?

[EVL20T]

EVO I-III RATIOS:

Info I've gathered and discovered over time and summarised below.

TRANSFER CASES:
* VR4 gearbox + VR4 transfer case input spline count = 22 (You will need a 1.090 VR4 transfer case when using a VR4 gearbox as its the only transfer case to suit the gearbox output shaft's spline count) = 3.545 rear diff ratio result. NOTE: VR4 EVO have a 23 spline count therefore refer to below GSR stats.
* GSR gearbox + GSR transfer case input spline count = 23 (You can mix and match a GSR gearbox with a GSR or EVO I-II 1.090 transfer case only) = 3.545 rear diff ratio result
* EVO I-II gearbox + EVO I-II transfer case input spline count= 23 (You can mix and match EVO I-II gearbox with GSR or EVO I-II 1.090 transfer cases only) = 3.909 rear diff ratio result
* EVO III gearbox + EVO III transfer case input spline count = 23 (You MUST USE the EVO III 1.074 transfer case with the EVO III gearbox only as it corrects the ratio to accept a 3.909 rear diff) = 3.909 rear diff ratio result

REAR DIFFS:
* First thing's first. All EVO I-III rear diff ratios are 3.909. All EVO I-III RS/GSR had a rear mechancial LSD diff centre, except the EVO 1 GSR which had a viscious LSD rear centre with different length rear driveshaft cups and shafts.
* If you are using an EVO III gearbox, YOU MUST also use an EVO III transfer case to correct the rear ratio to 3.909 - this will suit any of the EVO I-III 3.909 rear diffs.
* To make an EVO rear mech LSD a ratio of 3.545 to suit a E39A Galant VR4 or GSR 3.545 gearbox - Simply keep your existing GSR or VR4 rear diff housing, remove the diff centre and remove the 3.545 crown wheel and pinion from it. Get an EVO rear mech LSD centre, and transfer your 3.545 crown wheel and pinion into it. The replaced parts will NEED to be done by a professional as they need to setup the backlash and tooth contact correctly. If its a tiny bit off you're screwed. This can then go back into your existing housing and your existing axles can plug straight in.
__________________________________________________

The gear ratios are on lancerregister.com under 'evo 1-3 buyers guide'
Here they are anyway:

EVO I:
2.571 (1st)
1.600
1.160
0.862
0.617 (5th)
Rear diff: 3.909

EVO II-III: (EVO III has slightly different transfer and front diff ratio)
2.750 (1st)
1.684
1.160
0.862
0.617 (5th)
Rear diff: 3.909

GSR: (CD5A)
2.917 (1st)
1.684
1.115
0.833
0.666 (5th)
Rear diff: 3.545

I have also got some info on EVO/GSR/VR4 diff and transfer case ratios below which I got from NZ MMC:

VR4s and GSRs:
1.090 Transfer ratio (TR) (24/22)
3.867 (58/15) front diff ratio. (FDR)
3.545 (39/11) Rear diff ratio (RDR)
RDR x TR = 3.866 combined rear final drive
Total final Drive ratio TFD of 4.9333

EVO 1 and 2s:
1.090 (24/22) TR
4.266 (64/15) FDR
3.909 (43/11) RDR
RDR x TR 1.090 (24/22) = 4.264 combined rear final drive
TFD = 5.443

EVO 3
1.074 TR (29/27)
4.200 (63/15) FRD
3.909 (43/11) RDR
RDR x TR = 4.199 combined rear final drive.
TFD = 5.358

The total final drive TFD, is the diff ratio (front or rear+transfer) multiplied by the 37/29 (1.276) primary reduction inside the gearbox that occurs before the diffs.

Contrary to belief, converting one of these 4WD 'boxes to FWD will NOT change the final drive ratio, why the hell would it?

"and yes an evo 2 gearbox and evo 3 rear diff would work together using either the evo 2 or gsr transfer case"

More info here

http://www.evocoupe....opic.php?t=4070

[K33P_UP]

thanks mate, is there a number i can check on the gearbox to make sure its an evo 3 one?

[EVL20T]

I have no idea mate, best ask someone more experirnced with AWD gear

Rob, Baz, Clutz, Jon??? or ask Meek or Andrew CVAP

[Missile]

Ripped from the internets:

Evo 1
WQGE: GSR
WQWE: GSR with front LSD
WQYE: RS
WQFE: RS with front LSD

Evo 2
WPGE: GSR
WPWE: GSR with front LSD
WPYE: RS
WPFE: RS with front LSD

Evo 3
UPGE: GSR
UPWE: GSR with front LSD
UPYE: RS
UPFE: RS with front LSD

[terbulent]

GearBox Code Vehicle Front LSD RatioW5M33-2-NGRE Lancer gsr RS (1992, 1800cc) ?W5M33-2-NNZT Eclipse AWD 5spd mfg 3/94 ?W5M33-2-NPXV 91-94 Eclipse AWD 5spd mfg 6/90-2/94 ?W5M33-2-NPZT 95-96 Eclipse AWD 5spd mfg 3/94-6/96 ?W5M33-2-NQBE Libero/Lancer Gsr, non lsd version of NRWE No 3.545W5M33-2-NQBK 1991-92 to 4/92 VR4/ZR4 Galant ?W5M33-2-NQBM 1992 Galant to 5/92 ?W5M33-2-NRBE 92-95 Lancer GSR, lightweight synco's 2nd & 3rd No 3.545W5M33-2-NRWE 92-95 Lancer GSR, stronger box, dbl syncro 2nd Yes 3.545W5M33-2-NRXD 1990 Cyborg No 3.545W5M33-2-UPFE Evo3 RS with front LSD Yes 3.909W5M33-2-UPGE Evo3 GSR non LSD No 3.909W5M33-2-UPWE Evo3 GSR with front LSD Yes 3.909W5M33-2-UPYE Evo3 RS non LSD No 3.909W5M33-2-WPFE Evo2 RS with front LSD Yes 3.909W5M33-2-WPGE Evo2 GSR non LSD No 3.909W5M33-2-WPVF Galant VR4 E84A ?W5M33-2-WPWE Evo2 GSR with front LSD Yes 3.909W5M33-2-WPYE Evo2 RS non LSD No 3.909W5M33-2-WQFE Evo1 RS with front LSD Yes 3.909W5M33-2-WQFK Galant VR4 evo ? ?W5M33-2-WQGE Evo1 GSR non LSD No 3.909W5M33-2-WQNK VR4 Evo, close ratio box ? No 3.909W5M33-2-WQWE Evo1 GSR (and RS?) with front LSD Yes 3.909W5M33-2-WQYE Evo1 RS non LSD No 3.909

[terbulent]

GearBox Code Vehicle Front LSD RatioW5M33-2-NGRE Lancer gsr RS (1992, 1800cc) ?W5M33-2-NNZT Eclipse AWD 5spd mfg 3/94 ?W5M33-2-NPXV 91-94 Eclipse AWD 5spd mfg 6/90-2/94 ?W5M33-2-NPZT 95-96 Eclipse AWD 5spd mfg 3/94-6/96 ?W5M33-2-NQBE Libero/Lancer Gsr, non lsd version of NRWE No 3.545W5M33-2-NQBK 1991-92 to 4/92 VR4/ZR4 Galant ?W5M33-2-NQBM 1992 Galant to 5/92 ?W5M33-2-NRBE 92-95 Lancer GSR, lightweight synco's 2nd & 3rd No 3.545W5M33-2-NRWE 92-95 Lancer GSR, stronger box, dbl syncro 2nd Yes 3.545W5M33-2-NRXD 1990 Cyborg No 3.545W5M33-2-UPFE Evo3 RS with front LSD Yes 3.909W5M33-2-UPGE Evo3 GSR non LSD No 3.909W5M33-2-UPWE Evo3 GSR with front LSD Yes 3.909W5M33-2-UPYE Evo3 RS non LSD No 3.909W5M33-2-WPFE Evo2 RS with front LSD Yes 3.909W5M33-2-WPGE Evo2 GSR non LSD No 3.909W5M33-2-WPVF Galant VR4 E84A ?W5M33-2-WPWE Evo2 GSR with front LSD Yes 3.909W5M33-2-WPYE Evo2 RS non LSD No 3.909W5M33-2-WQFE Evo1 RS with front LSD Yes 3.909W5M33-2-WQFK Galant VR4 evo ? ?W5M33-2-WQGE Evo1 GSR non LSD No 3.909W5M33-2-WQNK VR4 Evo, close ratio box ? No 3.909W5M33-2-WQWE Evo1 GSR (and RS?) with front LSD Yes 3.909W5M33-2-WQYE Evo1 RS non LSD No 3.909

[terbulent]

not sure why these arent spacing, will delete this post when i get home, unable to access the modify from work... in the mean time i put it in a text file

Attached Files

•  gearbox codes.txt   98bytes   19 downloads

[Hypo]

Where is the gearbox code?

[K33P_UP]

thanks guys, ill check it out tonight. gearbox code would be sweet to know too, ill see what's on my gearbox first.

Edited by K33P_UP, 22 June 2009 - 06:21 AM.

[EVL20T]

Oh sorry i didnt read your question properly coz i was in a hurry, i thought you ment the number on the transfer case lol

Yeh Timmy posted up the gearbox codes, they are also in the EVOCOUPE link i posted above

[evopwr]

one question,

say i'm running a 3.545 (gsr) gearbox which is converted to rwd (ie front diff is ineffective).

Can i keep the 3.909 rear evo diff or will i have to change that to gsr-spec ratio?

[JAP63]

one question,

say i'm running a 3.545 (gsr) gearbox which is converted to rwd (ie front diff is ineffective).

Can i keep the 3.909 rear evo diff or will i have to change that to gsr-spec ratio?

Your front gearbox ratio will always have to match your rear diff ratio...for 4wd
However, i do beleive it is only if the rerar diff is active thered be no issue, is the vcu dissabled?

[evopwr]

yeh vcu eliminated.

i thought so too. cheers

[Missile]

Digging up this one, is there any way to identify what box a transfer case is from. I have two here, one is an evo 3, and the other is unknown.

Any numbers etc.

[BMGTZ]

you would have to take the side cover off mate and count the teeth

[Qik-1.8]

sorry to bring up an old thread but how much would you be looking at for a second hand evo 1-3 lsd diff????

[Evo-00x]

The EVO 1 GSR viscous rear LSD complete housing, with both cups and axle shafts would go for around $400 or so due to not as being as popular as the mechanical rear LSD.

The EVO 1 RS, and all EVO II and EVO III mechanical (plate type) rear LSD housings complete, less cups and axles sell for around $400-$600. Most shops sell in the higher end of the scale, and now and then you see them pop up in forums for around $400-$500.

[Qik-1.8]

guys im really confussed here atm about rear diffs can some please clear this up for me..... now my mechnic tells me i need a rear diff with 4.525 for my 93 lancer gsr 1.8 this is what mitsubishi told him, now as far as i am reading here in this thread the gsr rear diff is 3.252, is there any other diff for the gsr ????? or has he put the wrong number down or mitsubshi told him the wrong number

[DOUGMO]

gsr is 3.5
evo is 3.9