5 replies to this topic

[cheeks]

How many splines are on the input shaft to the gearbox and are their any differences between the 1G 6 bolt gearboxes?

[Evo-00x]

EVO I CD9A:
GEAR RATIOS INPUT/INTERMEDIATE:
1st - 14/36 = 2.571
2nd – 20/32 = 1.600
3rd - 25/29 = 1.160
4th - 29/25 = 0.862
5th - 34/21 = 0.617
GEARBOX CODES:
WQGE-GSR no LSD
WQWE-GSR with viscous front LSD
WQYE-RS no LSD
WQFE-RS with viscous front LSD
selector ring size is 96.8 on input and 96.8 on int
EVO I Front Diff Crownwheel = 64 teeth
EVO I output shaft = 15 teeth
Front Diff Ratio = 64/15 = 4.266
Output shaft to transfer case = 23 teeth
Transfer ratio = 1.09
Rear diff ratio = 3.545
Rear diff ratio: 3.909

EVO II-III CE9A: (EVO III has slightly different transfer and front diff ratio)
GEAR RATIOS INPUT/INTERMEDIATE :
1st - 12/33 = 2.750
2nd – 19/32 = 1.684
3rd - 25/29 = 1.160
4th - 29/25 = 0.862
5th - 34/21 = 0.617
GEARBOX CODES EVO II
WPGE-GSR no LSD
WPWE-GSR with viscous front LSD
WPYE-RS no LSD
WPFE-RS with viscous front LSD
selector ring 92.9 input 97.2 int
EVO II Front Diff Crownwheel = 64 teeth
EVO II output shaft = 15 teeth
EVO II Front Diff Ratio = 64/15 = 4.266
EVO II Transfer ratio = 1.09
Rear diff ratio: 3.909
GEARBOX CODES EVO III
UPGE-GSR no LSD
UPWE-GSR with viscous front LSD
UPYE-RS no LSD
UPFE-RS with viscous front LSD
selector ring 92.9 input 97.2 int
EVO III Front Diff Crownwheel = 63 teeth
EVO III output shaft = 15 teeth
EVO III Front Diff Ratio = 63/15 = 4.200
Output shaft to transfer case = 23 teeth
EVO III Transfer ratio = 1.074
Rear diff ratio: 3.909

GSR LANCER CD5A:
GEAR RATIOS INPUT/INTERMEDIATE:
1st – 12/35 = 2.917
2nd – 19/32 = 1.684
3rd – 26/29 = 1.115
4th – 30/25 = 0.833
5th – 33/22 = 0.666
GEARBOX CODES
NRBE-GSR no LSD
NRWE-GSR with viscous front LSD.
selector ring size is 96.8 on input and 96.8 on int
GSR Front Diff Crownwheel = 58 teeth
GSR output shaft = 15 teeth
Front Diff Ratio = 58/15 = 3.866
Output shaft to transfer case = 23 teeth
Transfer ratio = 1.09
Rear diff ratio: 3.545 (39/11)

OK, now just put this together for you for the DSM 1G

1G DSM AWD W5M33-2-NPXV Gearbox code.
Fitted to 91-94 Eclipse AWD 5spd manufactured between 6/90 - 2/94.
The 1G AWD manual transmission actually shares the same input and intermediate shafts as our CD5A GSR Lancer's do.
It actually shares quite a lot the same as our GSR boxes and only difference is a different 1st and 3rd gear cog to the GSR!!
1st gear = 12/37 = 3.083 (1G specific 37 tooth gear cog which lives on the intermediate shaft).
2nd gear = 19/32 = 1.684 (same tooth count as GSR and EVO I-III) Note: EVO 1 uses a completely different gear. All are double synchro.
3rd gear = 25/29 = 1.160 (same tooth count as EVO I-III) Note: But EVO II-III use double synchro 3rd gear sets.
4th gear = 30/25 = 0.8333 (same as GSR) Single synchro.
5th gear = 33/22 = 0.666 (same as GSR) Single synchro.
Reverse = 3.166
1G Front Diff Crownwheel = 58 teeth
1G output shaft = 15 teeth
Front Diff Ratio = 58/15 = 3.866
Output shaft to transfer case = 23 teeth
Transfer ratio = 1.09
Rear diff ratio: 3.545 (39/11)

Here are the DSM gearbox ratios to compare to: http://www.vfaq.com/mods/Trannies.html

Edited by EVO-00X, 30 March 2012 - 08:07 AM.

[cheeks]

Thanx for that. What I was actually inquiring about is the clutch splines. Bought a quartermaster V clutch from the states and the flywheel has turned up with 23 splines where mine has 20 splines. Before I jump up and down, I just wanted to check that all DSM 1G 6 Bolt clutches have 20 splines. I informed them that I had a 1991 VR4 4G63T 6 Bolt engine connected to an EVO 3 RS gearbox. I think they might have got the output shaft splines to the transfer case confused with the input splines but just want to be sure.

[Evo-00x]

Ahhh yeah man, the 4G63 AWD 1G/2G DSM's use same clutches as GSR and EVO.... they all use a clutch disc to fit onto a 20 tooth spline.

Edited by EVO-00X, 30 March 2012 - 08:55 AM.

[DOUGMO]

maybe because you said the dirty word evo you got an evo 8/9 clutch?

what size is the clutch plate outside diameter?

[dsm2evo]

sorry for bringing up an old thread, but I dont suppose any other cars came with the 64 tooth front diff besides evo 1 and 2s?