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K24a swapped ep3 with a 6 speed PNN3 transmission?

1K views 29 replies 3 participants last post by  katman  
#1 · (Edited)
I just picked up a 6 speed trans the guy told me it came off his k20a2 motor… but obviously the trans is from a 06-11 so now I’m confused.. will this transmission work with this motor? Or the ep3?
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Discussion starter · #11 ·
yeah, if you look through the "hole" in the diff and you see it being hollow or having a disk fitted, you got a LSD. If you see a cylindrical axle passing though the bore, it is an open diff.


Remove the plug for the VSS and check if there is a plastic gear fitted on the differential next to the bearing. See the angled teeth gear below the top bearing.

If not, you need the signal converter or refit this ring gear to the differential. But that is a lot of work and the gear is not cheap either.

View attachment 124422
So what would be the best way to get my css to vss? On my k20z3 trans
 
Discussion starter · #20 ·
if the gear is present, you will need to machine an M6 bolt hole to hold the VSS sensor down. It seems this is missing.
The VSS sensor hole is also not threaded. The sensor is sealed with an o-ring. But that is all doable.
I’m not sure what I’m looking for in the vss plug in about to just see what it looks like in my ep3 trans
 
Discussion starter · #22 ·
if the gear is present, you will need to machine an M6 bolt hole to hold the VSS sensor down. It seems this is missing.
The VSS sensor hole is also not threaded. The sensor is sealed with an o-ring. But that is all doable.
Ok so def no gear in there what are my options I really don’t wanna crack this case open
 
Discussion starter · #25 ·
fyi, you wont be able to fit the VSS into that threaded CSS hole (if thats whats being assumed), its a smaller diameter hole and won't accept the vss body at all.

how destroyed is your EP3 trans?

you will want to swap your EP3 shift mechanism over to the z3 trans if you want to retain your ep3 shifter cables and shifter setup.
This takes a little bit of work tho:
  • you have to tap and thread 2 new holes so all 4 shift mech holes can bolt down (2 holes will line up tho)
  • you'll have to swap the z3's internal 6spd shift mechanism gear-bracket over to the 5spd ep3's shift mechanism. If you don't do this, you won't be able to shift into 6th gear. Video tutorial here.
  • you'll lack reverse lock out using the ep3 shift mechanism but its not a big deal. just don't shift over into reverse while at speed lol.
  • you'll need to buy one of these shifter cable brackets
  • a ktuned or dakota css converter as Lotus mentioned and be able to make changes in your kpro (if you have one)
Thanks man I really appreciate this
 
Discussion starter · #26 ·
fyi, you wont be able to fit the VSS into that threaded CSS hole (if thats whats being assumed), its a smaller diameter hole and won't accept the vss body at all.

how destroyed is your EP3 trans?

you will want to swap your EP3 shift mechanism over to the z3 trans if you want to retain your ep3 shifter cables and shifter setup.
This takes a little bit of work tho:
  • you have to tap and thread 2 new holes so all 4 shift mech holes can bolt down (2 holes will line up tho)
  • you'll have to swap the z3's internal 6spd shift mechanism gear-bracket over to the 5spd ep3's shift mechanism. If you don't do this, you won't be able to shift into 6th gear. Video tutorial here.
  • you'll lack reverse lock out using the ep3 shift mechanism but its not a big deal. just don't shift over into reverse while at speed lol.
  • you'll need to buy one of these shifter cable brackets
  • a ktuned or dakota css converter as Lotus mentioned and be able to make changes in your kpro (if you have one)
So I did all this my motor trans is hooked up.. but my cables are not right… is there something different I need to do to my cables?
 
Discussion starter · #28 ·
So I did all this my motor trans is hooked up.. but my cables are not right… is there something different I need to do to my cables?
Well if you're using the PNN3 trans and you didnt swap your ep3 shift mechanism over, this is why your cables arent working. EP3 cables aren't compatible with the way the PNN3 shift mechanism actuates.
I swapped everything over I didn’t know my brackets were adjustable so now it’s better then it was
Should I get hybrid racing cables?