Shift coupler question, Are there different bushings? Options

[robkammer]

Hey Teeners, Just finished the shifter bushing in my SC and had great results. Figured I should do the BB as well to get some of the slop out. I started at the coupler and firewall, found the bushing had blown out and the coupler wasn't too bad. But since I had new bushings in hand I easily pulled the coupler apart and then found that the new bushings were not correct. The ID is way too large. Bought them from the local Porsche dealer in a weak moment of impatience. Parts bag shows 964-424-223-01. Ran the number on Pelican and their site says they are correct.
Please take a look at the photo and you'll see the problem.
Obviously I can;t cal anyone today but I'm wondering if anyone has seen this before?
The SC calls for a very similar bushing but it is a different part number, ending in 02.
My pin measures 12mm and the bushing ID is a bit over 13mm.
Thanks for reading this and any suggestions.
Rob

[rgalla9146]

There are two (now maybe three ?) versions of that bushing.
The earliest one is familiar to us for '73 and later cars with the side shift linkage.
It has a round, tight fitting hole for the cross pin.
The next one looks very similar but has an oval shaped hole for the cross pin.
The part number you show, 964 ... ... .. I think is for that part. It was intended to
reduce cabin noise in later 911s
The one you pictured is a new part with a larger center hole ?.....or is that your worn
old part ?

[robkammer]

That is the new bushing in the photo. From my experience with my SC coupler, the pin is a nice tight interference fit. These new bushings fit like 40 year old worn bushings.

[914Sixer]

Yes, there is a bunch of crap out there. Stay away from the oval bushings, lot of slop. A little more expensive but bronze bushings for a solid shifting eperience.

[Mikey914]

We have made a bushing that actually requires the slight elliptical hole to install and not put stress cracks on the aluminum housing. There has to be some give to allow it to flex slightly.
https://914rubber.com/shift-knuckle-bushing-1
The factory made these plastic for a reason.

But yes the gap you have is too large.

Drop me avPM I’ll drop you a set out.I think you will see the difference.

[930cabman]

had my local machinist make all of the shift rod bushings from Teflon with tighter tolerances. I found the "factory tolerances" were too great allowing slop within the system. New bushings with tighter tolerances work great

[GregAmy]

If you want to replace the bushings with a real joint, Chris' design is the answer:

http://www.tangerineracing.com/shiftlinkage.htm

Along with a firewall bearing:

http://www.tangerineracing.com/transmission.htm

I've done both in my race and street cars and really like it.

[914Sixer]

Another upgrade is to use the later 911 coupler minus the pin.

[robkammer]

Thanks Everyone. I have a set coming from AA, their story is that the dealer/factory bushings are always sloppy. Sure doesn't sound like Porsche, but I'll see haw the new ones fit. If they don't work I'll put one of Chris's couplers in if one is available.

Cheers!

[930cabman]

Thanks Everyone. I have a set coming from AA, their story is that the dealer/factory bushings are always sloppy. Sure doesn't sound like Porsche, but I'll see haw the new ones fit. If they don't work I'll put one of Chris's couplers in if one is available.

Cheers!

I cannot understand either, how can the factory stuff be sloppy? I am sure the Tangerine unit works great.

[Superhawk996]

I cannot understand either, how can the factory stuff be sloppy?

You're surprised that Porsche is selling 914 parts that don't fit?

Just try ordering a set of 914/4 CV joints from them . . . (IMG:style_emoticons/default/av-943.gif)

[Mikey914]

Hint - They don't make most of the parts they sell (IMG:style_emoticons/default/dry.gif)

[robkammer]

Of course they don't Mikey. Hardly anyone does. Most contract with offshore manufacturers and trust that they will follow and meet the specs ordered. Ordering from a Porsche dealer I did expect the part to at least or better than the parts I buy from your company and other great aftermarket sources. If I'm not mistaken your firm also ascribes to the offshore manufacturing model. Most of the time it works just fine.
I'm hopeful that the new new aftermarket bushings will be just fine. They could in fact be from the same offshore manufacturer that you use!

[bkrantz]

I cannot understand either, how can the factory stuff be sloppy?

You're surprised that Porsche is selling 914 parts that don't fit?

Just try ordering a set of 914/4 CV joints from them . . . (IMG:style_emoticons/default/av-943.gif)

CVs? Genuine proper 914-4 fit? Nope! Been there, done that.

[Superhawk996]

Of course they don't Mikey. Hardly anyone does. Most contract with offshore manufacturers and trust that they will follow and meet the specs ordered. Ordering from a Porsche dealer I did expect the part to at least or better than the parts I buy from your company and other great aftermarket sources. If I'm not mistaken your firm also ascribes to the offshore manufacturing model. Most of the time it works just fine.
I'm hopeful that the new new aftermarket bushings will be just fine. They could in fact be from the same offshore manufacturer that you use!

The problem isn’t where it’s manufactured. Rather, it’s that Porsche doesn’t care to do the work to understand what their OEM parts were, and to verify proper applicability and fitment of what they are selling.

It is a shame. Like you, I would like Porsche parts to fit and to be of the highest quality. Unfortunately, that is not how Porsche Classics is currently operating.

[rgalla9146]

Back to the original question......
Is the original version with the tight round pin hole currently available ?

[Mikey914]

The Originals were not round, but compress.

[Superhawk996]

Back to the original question......
Is the original version with the tight round pin hole currently available ?

I'm sure there are multiple sources AA, 914 Rubber, Pelican, etc., that are all fine.

I used p/n 99-1758-424-M523 from Pelican and had no issues with fit.

[dr914@autoatlanta.com]

yes coupler bushings were shared with 356 911 912 and 914, but the three former had some play in them to account for powerplant movement as their engines were in the rear and transmitted the shaking through the shifter. Porsche 914 coupler bushings had a perfectly round hole in them originally. Some how the coupler bushings were superseded to more sloppy ones. The key is to purchase aftermarket delrin bushings and return the 914 to its original shifting configuration. We sell them all of the time and people do not believe the difference having suffered from the incorrect bushings in the coupler OR deteriorated bushings that have crumbled out of the aluminum coupler

Hey Teeners, Just finished the shifter bushing in my SC and had great results. Figured I should do the BB as well to get some of the slop out. I started at the coupler and firewall, found the bushing had blown out and the coupler wasn't too bad. But since I had new bushings in hand I easily pulled the coupler apart and then found that the new bushings were not correct. The ID is way too large. Bought them from the local Porsche dealer in a weak moment of impatience. Parts bag shows 964-424-223-01. Ran the number on Pelican and their site says they are correct.
Please take a look at the photo and you'll see the problem.
Obviously I can;t cal anyone today but I'm wondering if anyone has seen this before?
The SC calls for a very similar bushing but it is a different part number, ending in 02.
My pin measures 12mm and the bushing ID is a bit over 13mm.
Thanks for reading this and any suggestions.
Rob

[robkammer]

Hey Teeners, After waiting a week for parts and a chance to get to the shop I was excited to have proper bushings to get the coupler back together. NOT. The new bushings not only just about fell into the coupler but the pin holes are not round and much larger than the pin. In the new photo you can see the flats on the pin hole and daylight on the other side.
Bronze bushings next? Chris's coupler?
I may resort to putting the old bushings back in as they were better than the two sets I just bought.
These bushings were URO branded too.
AAAAARRRGGGGHHHHHH!
Rob