Not another shifter question!

[NZJimmy]

Hi all, still scratching my head a bit so thought I'd post a quick (dreaded gearbox!) question. Many will probably turn away when you read its an adjustment question! I know this can open a can of worms but here goes...

84 Carrera with well maintained 915. Is factory short shift and I've put on the Seine kit and have gone through all bushings etc with new. Also put on the Wevo psj coupler and new Wevo clamp. Did all this a while ago but unfortunately haven't had much seat time lately due to other commitments other than every weekend or two to get the oil up.

Have spent a bit of time trying to get adjustment right with new coupler. With the Seine kit can't have too much side to side movement in lever so tightened that up a bit. Main issue is still a pesky down change into 4th.

When i do the 'garage test' with adjustment I come out happy thinking I've nailed it i.e. can get all gears while stationary incl reverse and feels 'good'. Go for a test drive and goes through all gears well up to 5th, try for 4th downshift and feel resistance but i can go into up 3rd and then pull back into 4th from there fine. It's just the 5th to 4th.

I've spent far too long reading coupler adjustment threads and this is where my confusing sets in. My process has been pretty normal: With coupler clamp loose, turn coupler clockwise when looking forward, shifter in vertical position, hold shifter in N plane between 1 and 2 (have to hold due to spring resistance from Seine in that plane).

What am I doing wrong? Is there some adjustment I'm missing-do i need to 'back' off a bit on turning the coupler. Threads all speak of the 'feel' etc but i have been adjusting for what seems an age and cant get this 5th to 4th so all I 'feel' is mad haha!

Could it be selector fork? Would this prevent this shift or my understanding is it would make a gear 'bad' all the time not just on one motion?

I like doing this stuff myself and never really like to shop out but it's starting to get annoying.

Thanks in advance for any tips/help to keep my sanity!

cheers,
Jimmy

[Arne2]

On my '84 with factory short shift and seine, I fussed for weeks trying to get that adjustment correct. The sweet spot that allows the lever to go forward far enough to trip the lockout cam properly but not interfere with the gate tab is minuscule. You may be forced to do some minor metalwork to get it right.

Or you could do what I did and ditch the short shift. My car shifts so much better with the normal shifter and Seine, I'll never go back.

[DRACO A5OG]

Let me ask you, is the rubber boot on when you do this adjustment?

I ask because if you can keep the cover away from the gate, you can clearly see where the shifts are landing and adjust accordingly. I recently helped a brother out to adjust his shifter after we corrected his bushing. His stick bushing was not seated in the cup bushing, fyi.

I have the Factory SS and Sienes GSK with Derlin Bushing Coupler.

[NZJimmy]

Arne-how does removal of ss solve down change-is it because of longer throw/motion? As mine is factory ss would ideally like to keep as I'd have to purchase new standard kit If I its remove. Was thinking about full Rennshift unit hoping this would make life easier but it's a few $$$ and don't know if that would help.

Draco-yes, I remove centre console (gives a bit more space) and pull boot up to shift knob so I can see better but it is a bit hard on own while holding coupler and ratchet/spanners-need more arms! If I pull boot up now should I just go through gears stationary and see if any issues? It seems to get all gears when doing garage work but I might need to look a bit harder. Regarding comment seeing where shifts are landing and adjust accordingly-does this mean back off rotation of coupler a bit?

Thanks guys.
Cheers,jimmy

[DRACO A5OG]

Yes, you need a helper to tighten the clamp once you find the "sweet spot", removing the passenger side seat would help too, just gives you more room.

Yes, as the boot is up, you will or should see how it shifts into each position. It will make sense as you watch the shifts where it may be binding on or not getting into your gear of choice. All gears should sit evenly and insure the 5th and reverse lock outs are smooth.

You will loosen the coupler to adjust accordingly.

I say this because I followed the text book but could not really see what was happening until I saw the gate and where it was sitting when I chose the gear.

Gosh I hope I am making sense???

[Reiver]

When adjusting the coupler take all of the seine spring pressure off....tighten it so it does not 'work' and the shift lever is loose as in the stock mode.
Then adjust and when finished set the seine into play.

[NZJimmy]

Originally Posted by DRACO A5OG

Yes, you need a helper to tighten the clamp once you find the "sweet spot", removing the passenger side seat would help too, just gives you more room.

Yes, as the boot is up, you will or should see how it shifts into each position. It will make sense as you watch the shifts where it may be binding on or not getting into your gear of choice. All gears should sit evenly and insure the 5th and reverse lock outs are smooth.

You will loosen the coupler to adjust accordingly.

I say this because I followed the text book but could not really see what was happening until I saw the gate and where it was sitting when I chose the gear.

Gosh I hope I am making sense???

Hi, yes thanks-making sense! Helper would be handy. Regarding checking each gear and loosening coupler to adjust-do you mean rotating coupler or letting shaft move in/out of coupler as the adjustment? cheers

[NZJimmy]

Originally Posted by Reiver

When adjusting the coupler take all of the seine spring pressure off....tighten it so it does not 'work' and the shift lever is loose as in the stock mode.
Then adjust and when finished set the seine into play.

Thanks-I didn't think of that but makes good sense, You mean backing off nut/allen key at front of housing to take pressure off (side to side)?

cheers, Jimmy