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1G transmission"options"

Posted by 1GAWD87, Jul 2, 2020

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  1. 1GAWD87

    1GAWD87 Supporting Member

    73
    32
    Joined Mar 8, 2009
    milaca, Minnesota
    so long story short, i pulled onto the highway on a very busy father's day grabbed 2nd hard and stripped the teeth on my shep stage 3. all gears work besides 2nd. i have multiple stock awd transmissions. 1- 93 and a couple 90's. i also have a fwd from a 98 can i swap 2nd with the duel synchros from that? i have a transmission guy, but to be honest I'm not a tranny guy. any ideas would be great. obviously I'd like to keep my shep in the car. thanks
     

    Drag Race Build 495  9

    1991 Eagle Talon TSi AWD
    awd · manual · 1G DSM

    225  4

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM

    Street Build 232  7

    1990 Eagle Talon TSi
    13.805 @ 99.67 · 1G DSM
    Loading...
  2. pauleyman

    pauleyman DSM Wiseman

    6,323
    1,607
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    If other gears work you probably didn't strip teeth. You probably broke a fork or a rail end. Stripped teeth will go everywhere and destroy other stuff.
    Take it apart and find out.

    What you can and can't swap will also depend on what year trans is currently in the car. You need to provide more information please.
     
    Last edited by a moderator: Jul 3, 2020

    Street Build 4K  1

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
    steve and Widgmaster like this.
  3. 1GAWD87

    1GAWD87 Supporting Member

    73
    32
    Joined Mar 8, 2009
    milaca, Minnesota
    Mine is a kw5m332npzs, which shows it's a 89-90 eclipse tran . I bought the roller and trans from the same guy. Cars a 91, any way to tell if the shift linkage is from a 90?

    I'm using a 23 spline t- case? I'll get more info when I get more LOL
     
    Last edited by a moderator: Jul 3, 2020

    Drag Race Build 495  9

    1991 Eagle Talon TSi AWD
    awd · manual · 1G DSM

    225  4

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM

    Street Build 232  7

    1990 Eagle Talon TSi
    13.805 @ 99.67 · 1G DSM
    Loading...
  4. 1GAWD87

    1GAWD87 Supporting Member

    73
    32
    Joined Mar 8, 2009
    milaca, Minnesota
    so i confirmed it is a 90 transmission my gsx has the same tranny code. if i need to split the tranny to get more info, it's a little intimidating for me as that's all new to me
     

    Drag Race Build 495  9

    1991 Eagle Talon TSi AWD
    awd · manual · 1G DSM

    225  4

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM

    Street Build 232  7

    1990 Eagle Talon TSi
    13.805 @ 99.67 · 1G DSM
    Loading...
  5. pauleyman

    pauleyman DSM Wiseman

    6,323
    1,607
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    Assuming it is a 90 inside no you can't use a double cone 2nd. Not without changes. If it is for sure 23 spline somebody changed it.
    You have to rip it apart anyway. Maybe time to gain some knowlwdge?
     

    Street Build 4K  1

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
    98 dsm likes this.
  6. frosh29

    frosh29 Proven Member

    297
    32
    Joined Jul 29, 2004
    Wallington, New Jersey
    Pics would be great when you pull it apart.

    Scott
     

    Street Build 366  1

    1995 Eagle Talon TSi AWD
    awd · manual · 2G DSM

    Street Build 664  1

    1991 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM
    Loading...
  7. 1GAWD87

    1GAWD87 Supporting Member

    73
    32
    Joined Mar 8, 2009
    milaca, Minnesota
    in the process of removing transmission now, still need to do some research on the breakdown procedure at least enough to see what gear set i have and the damage. to clarify this didn't happen upon entry of second, but right about peak torque. i found this when i drained my fluid also alot of non ferris aluminium and bronze flakes

    that's what ive discovered so far... fingers crossed but not looking promising
     

    Attached Files:

    Last edited by a moderator: Aug 25, 2020

    Drag Race Build 495  9

    1991 Eagle Talon TSi AWD
    awd · manual · 1G DSM

    225  4

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM

    Street Build 232  7

    1990 Eagle Talon TSi
    13.805 @ 99.67 · 1G DSM
    Loading...
  8. 1GAWD87

    1GAWD87 Supporting Member

    73
    32
    Joined Mar 8, 2009
    milaca, Minnesota
    update: transmission is out and at my transmission guy. decided to bring it there whole so it wasn't in a box of parts "which he appreciates" LOL. i will be posting pictures of the damage and gearset so you guys can further help which it's very appreciated!
     

    Drag Race Build 495  9

    1991 Eagle Talon TSi AWD
    awd · manual · 1G DSM

    225  4

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM

    Street Build 232  7

    1990 Eagle Talon TSi
    13.805 @ 99.67 · 1G DSM
    Loading...
  9. Charliethatguy

    Charliethatguy Proven Member

    48
    13
    Joined Apr 14, 2018
    Madison, Wisconsin
    The way to tell the cables apart is by the adjustment on the shifter base. The 90 cables are adjustable on both. On 91 cables only one cable is. Now you shouldn't need to change cables if you have 90s as they are adjustable. The only combo that wont work is the 91 cables on a 90 trans.
     

    Street Build 516  3

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
    Loading...
  10. pauleyman

    pauleyman DSM Wiseman

    6,323
    1,607
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    Those bits look like aluminum which would coincide with a broken shift fork. Does a magnet pick them up?
     

    Street Build 4K  1

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  11. 1GAWD87

    1GAWD87 Supporting Member

    73
    32
    Joined Mar 8, 2009
    milaca, Minnesota
    update:
     

    Attached Files:

    Drag Race Build 495  9

    1991 Eagle Talon TSi AWD
    awd · manual · 1G DSM

    225  4

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM

    Street Build 232  7

    1990 Eagle Talon TSi
    13.805 @ 99.67 · 1G DSM
    Loading...
  12. pauleyman

    pauleyman DSM Wiseman

    6,323
    1,607
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    So what caused this?
     

    Street Build 4K  1

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  13. 1GAWD87

    1GAWD87 Supporting Member

    73
    32
    Joined Mar 8, 2009
    milaca, Minnesota
    you know Pauly I'm not sure.... it was a used Trans but always worked beautifully! maybe improper clutch adjustment with my twin disk? what are my options? I would love to keep the shep. I have a fwd 98 Trans. two 1st gen 23 spline awd and one 90 awd laying around, but that's a spare for my wife's
     
    Last edited: Aug 15, 2020

    Drag Race Build 495  9

    1991 Eagle Talon TSi AWD
    awd · manual · 1G DSM

    225  4

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM

    Street Build 232  7

    1990 Eagle Talon TSi
    13.805 @ 99.67 · 1G DSM
    Loading...
  14. pauleyman

    pauleyman DSM Wiseman

    6,323
    1,607
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    you can hodge podge whatever you want. I have seen dozens of units that were "fine" but had 50 thousandths play in the input and intermediate. Guess what happens to gear tooth contact when taper bearings have that much axial play. There are always tell tale signs on the interior of the case when its bad enough.

    grab the input shaft of any of your spares. Does it move? It shouldn't. Read carefully. Input shaft not output. Output has no taper bearings and it moves all over the place.
     
    Last edited by a moderator: Aug 25, 2020

    Street Build 4K  1

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  15. 1GAWD87

    1GAWD87 Supporting Member

    73
    32
    Joined Mar 8, 2009
    milaca, Minnesota
    my tranny guy figures the fork broke which caused the carnage. he said i need a new input shaft,which means I'd need an evo 3 input shaft with my evo 3 gearset correct? if so they are discontinued. any help is appreciated, he's relying on me for most of the info as this is a little out of his realm☹ and mine LOL
     

    Drag Race Build 495  9

    1991 Eagle Talon TSi AWD
    awd · manual · 1G DSM

    225  4

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM

    Street Build 232  7

    1990 Eagle Talon TSi
    13.805 @ 99.67 · 1G DSM
    Loading...
  16. pauleyman

    pauleyman DSM Wiseman

    6,323
    1,607
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    2nd gear is toast. Evo b or not you need a new input shaft. Are you running evo 1st and 2nd?
     

    Street Build 4K  1

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  17. twicks69

    twicks69 Supporting Vendor

    3,762
    854
    Joined Mar 12, 2004
    Milwaukee, Wisconsin
    That is a DSM ratio 1/2/3/4. you need a 90-99 DSM AWD input shaft and DSM MD748577 double synchro 2nd gear.
     

    Drag Race Build 9K  13  76

    1999 Mitsubishi Eclipse GSX
    9.499 @ 155.00 · 2G DSM
    Loading...
  18. 1GAWD87

    1GAWD87 Supporting Member

    73
    32
    Joined Mar 8, 2009
    milaca, Minnesota
    OK I appreciate it i was under the impression it was the evo gearset. if I can use a dsm input shaft things are looking more positive for me!

    sorry for my lack of knowledge on transmissions, but if that is a DSM gearset what makes this tranny better then a stock one?
     

    Drag Race Build 495  9

    1991 Eagle Talon TSi AWD
    awd · manual · 1G DSM

    225  4

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM

    Street Build 232  7

    1990 Eagle Talon TSi
    13.805 @ 99.67 · 1G DSM
    Loading...
  19. twicks69

    twicks69 Supporting Vendor

    3,762
    854
    Joined Mar 12, 2004
    Milwaukee, Wisconsin
    It is essentially a stock one, it is a 1990-91.5 style 3/4 conversion that had slightly stronger gear tooth profile and stronger 3/4 hub and slider assembly than the later stuff.
     

    Drag Race Build 9K  13  76

    1999 Mitsubishi Eclipse GSX
    9.499 @ 155.00 · 2G DSM
    Loading...
  20. Mech Addict

    Mech Addict Supporting Member

    455
    165
    Joined Jun 9, 2019
    Jackson, Wyoming
    So this is the 91 car that your profile lists as a “drag car”? How much hp/tq does it make? Must be pretty gutsy to do that much damage.
     

    Street Build 730  6

    1990 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM
    Loading...
  21. 1GAWD87

    1GAWD87 Supporting Member

    73
    32
    Joined Mar 8, 2009
    milaca, Minnesota
    that is unfortunate to hear Tim. I was told this was a shep stage 3. I called shep with the 4- digit serial number and it pulled up as a stage 3 built in 09 for almost 4k, obviously not the case. do you guys still have these parts?


    yes this is the white 91. it's got no guts without the tranny LOL. haven't put this one on a dyno yet if I had to guess close to 500hp. I could look at some logs but idk how accurate that is
     

    Drag Race Build 495  9

    1991 Eagle Talon TSi AWD
    awd · manual · 1G DSM

    225  4

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM

    Street Build 232  7

    1990 Eagle Talon TSi
    13.805 @ 99.67 · 1G DSM
    Loading...
  22. Mech Addict

    Mech Addict Supporting Member

    455
    165
    Joined Jun 9, 2019
    Jackson, Wyoming
    I thought the other gears still worked. With that much power you can skip a gear.
     

    Street Build 730  6

    1990 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM
    Loading...
  23. twicks69

    twicks69 Supporting Vendor

    3,762
    854
    Joined Mar 12, 2004
    Milwaukee, Wisconsin
    Looks like a shep stage 3, is it a 4 spider or a welded center diff?

    You dont understand, the 90 style 3/4 conversion stuff IS A SHEP STAGE 3. That's all it is.
     

    Drag Race Build 9K  13  76

    1999 Mitsubishi Eclipse GSX
    9.499 @ 155.00 · 2G DSM
    Loading...
  24. 1GAWD87

    1GAWD87 Supporting Member

    73
    32
    Joined Mar 8, 2009
    milaca, Minnesota
    yes it is a 4 spider. your right i don't understand LOL. I appreciate your info, ordering a new 2nd gear and all new bearings. I have a couple of trannies here, one will be a donor for the input shaft.
     

    Drag Race Build 495  9

    1991 Eagle Talon TSi AWD
    awd · manual · 1G DSM

    225  4

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM

    Street Build 232  7

    1990 Eagle Talon TSi
    13.805 @ 99.67 · 1G DSM
    Loading...

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