Stomski shift coupler- do they make a difference

[PWICK911]

Hi

As with all 911s selecting a gear can be less than confidence filling.

Will the stomski coupler make a difference??

Thanks

[patz]

Nicely built, long lasting even though the stock ones last 30+ years. Worth the price? Prolly.

[Trackrash]

Nice piece of engineering. However, for about $10 or $15 you can replace the rubber bushings with harder material, which will probably work well.

I machined new bushings out of aluminum when my bushings died. No slop in my coupler.

[PWICK911]

Originally Posted by Trackrash

Nice piece of engineering. However, for about $10 or $15 you can replace the rubber bushings with harder material, which will probably work well.

I machined new bushings out of aluminum when my bushings died. No slop in my coupler.

Bushes all replaced on linkage.
This is the last try before I consider a rebuild.

[Trackrash]

Originally Posted by PWICK911

Bushes all replaced on linkage.
This is the last try before I consider a rebuild.

Even these?


What are your symptoms?

[PWICK911]

Originally Posted by Trackrash

Even these?


What are your symptoms?

Yes. All bushes done.

Fitted wevo 12months ago which has increased the difficulty in selecting gears.

Yes, it has all been set up by an expert.

I have tried other 911 and they are all notchy to a degree, however mine is spoiling my driving experience and enjoyment.

I want to keep the wevo as I like the shorter throw and position of the stick.

👍

[winders]

Originally Posted by PWICK911

Yes. All bushes done.

Fitted wevo 12months ago which has increased the difficulty in selecting gears.

Yes, it has all been set up by an expert.

I have tried other 911 and they are all notchy to a degree, however mine is spoiling my driving experience and enjoyment.

I want to keep the wevo as I like the shorter throw and position of the stick.

👍

If you have a harder time selecting gears, it is not setup properly.......

[winders]

Originally Posted by PWICK911

Will the stomski coupler make a difference??

Over a sloppy stock one, yes. Over a stock coupler with bushings with no play? No.

I thought about getting one for my race car but rebuilt the stock one and it is precise with no play. The only thing the Stomski would do better is lighten my wallet more.

[toddu]

Originally Posted by winders

If you have a harder time selecting gears, it is not setup properly.......

+1. Put a WEVO in my car and LOVE it. Got the taller handle and I no longer lean forward to get 3 or 5. The WEVO adjust differently from the stock unit. I imagine your wrench knows this (but maybe not?).

Todd

[Trackrash]

Have you read this? Worth checking out before dropping the trans.
loose 6 mm stud in 915 gearbox

[dicklague]

I have a Wevo coupler and Wevo internal shift gate on a rebuilt trans with factory short shifter. REALLY REALLY works well.

I HIGHLY recommended the Stomski or the Wevo. Both great products.

[dicklague]

I have a Wevo coupler and Wevo internal shift gate on a rebuilt trans with factory short shifter. REALLY REALLY works well.

I HIGHLY recommended the Stomski or the Wevo. Both great products.

[rattlsnak]

Originally Posted by winders

Over a sloppy stock one, yes. Over a stock coupler with bushings with no play? No.

I disagree. No way a stock coupler with whatever kind of bushings you put in it can ever be as precise as the Wevo or Stromski version which is all metal. I promise you, yours has some movement in it that these types do not and will never wear out and get looser. One of the best upgrades you can do for the money.

[winders]

Originally Posted by winders

Over a sloppy stock one, yes. Over a stock coupler with bushings with no play? No.

Originally Posted by rattlsnak

I disagree. No way a stock coupler with whatever kind of bushings you put in it can ever be as precise as the Wevo or Stromski version which is all metal. I promise you, yours has some movement in it that these types do not and will never wear out and get looser. One of the best upgrades you can do for the money.

You can disagree, but you would be incorrect. I have a Rennshift shifter. I replaced the stock bushings (coupler, ball cup, and shift shaft) with Delrin bushings. I have no play in the coupler. None. Nada. Zero. The only play in the system is due to the ball cup bushing being every so slightly smaller than the cup. It would be impossible for the Stomski or Wevo coupler to have less play. It's amazing how little movement is required at the shifter to move the rod coming out of the transmission.

The parts I used are here:

WEVO vs. Stomski shift couplers?

Here is a video of my coupler in action:

https://youtu.be/O-QPUmSTmtk

[universeman]

WEVO PSJ +1

Can't comment on Stomski but seems very similar in design.

The decades-old design of the shift coupler can be, and has been, improved with modern CNC technology. Whether or not that improvement is perceptible and meaningful is probably personal opinion. It could be overkill. My shifting, however, improved greatly with a PSJ.

[gtc]

Lol... U-joints aren't exactly modern technology. I think they've been around a lont longer than our shift couplers.

Originally Posted by universeman

WEVO PSJ +1

Can't comment on Stomski but seems very similar in design.

The decades-old design of the shift coupler can be, and has been, improved with modern CNC technology. Whether or not that improvement is perceptible and meaningful is probably personal opinion. It could be overkill. My shifting, however, improved greatly with a PSJ.

[impactbumper]

I have rennshift with stomski coupler. I could do as good without the couple by just rebuilding the stock one with bushings.


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[PWICK911]

Ok so it's been setup/adjusted again and the issue "we" think is the synchro S.???

5th to 4th is difficult.
5th to 3rd is ok
4th to 5th is ok

Linkage has been adjusted both ways and gives the same result.
The problem is there in all positions.

Can the scynros be up rated when replaced?

[RSBob]

You need to find a new expert. I added a Stromski and it made no real difference, but then it was already shifting at an 8 out of 10. Good luck.

[al lkosmal]

You need to look at the whole shifting mechanism...as a system. It all has to be in good shape and adjusted properly to work well. If all the wear parts (bushings, etc.) are worn and the shifter is not adjusted properly...I.E. if it's like most after 30-40 years of driving...and you just install a new coupler..you will likely be disappointed in the results. On the other hand....if your system is already in excellent shape and you install one new bit......the change may be slight.

I had a 77S that shifted ok, but throws were long and a little vague. I replaced all bushings and installed a WEVO shifter. After spending a bit of time adjusting things.......excellent shifting. ....but the starting point was sloppy and I replaced all the wear items. Noticeable difference

However, I once bought a 66 912 that shifted like you were stirring oatmeal and you could occasionally find a gear or two, if persistent. When I dug into it, I found that the coupler bushings had been replaced with sections of garden hose....that was bad enough...but one of them had fallen out..............In this instance, because the starting point was so bad..replacing the bushings and adjusting really made a huge difference.....you could find a gear...without divine intervention........

Your results may vary.