Pauter gear issue.

[Lyndon302]

My new gears. 911 1967 S
When fitted. Sloppy as. The dowels are redundant. All the load on the three bolts. Clearly not good enough. This will rock back and forth. It's does now when finger tight. Am I correct the load had to be controlled with shear. Does not matter how tight I do the bolts they will soon start rocking.
????
Lyndon

[RogueEngineer]

The gear typically pilots into the intermediate shaft very snugly. This is necessary to limit gear runout at high speeds at also eliminates rocking.

Do the dowels also not fit snug into the gear holes? The dowels should prevent the fasteners from coming into shear.

[reclino]

I believe the later model cars didn't have dowels, but had 6 bolts. At least that's how my 1986 930 is.

[Lyndon302]

The dowels are half the size of the of the holes.
They are just ornaments.

[reclino]

I am guessing that Pauter assumed you would remove dowels, ream holes up to fit the 8mm bolts and install 3 extra bolts like in the later cars. Maybe a phone call or email to them would clear this up.

[gled49]

That’s what they want. Make sure it’s intended for early intermediate shaft as gear and mounting have a slightly different offset than later gears.

[RogueEngineer]

Without a pilot, the dowels are most likely there to center & properly locate the gear to the shaft.

If the dowel's aren't functional and there is no pilot between the gear and shaft like on later models, what locates/centers the gear to the shaft? As Lyndon mentioned, there's clearance between the bolts and gear.

I would definitely check to to make sure this is the proper gear. Something seems amiss.

[stownsen914]

Looks like reclino called it with his first post. The Pauter gear may not be intended for the early style shafts. A machinist could modify the early shaft.

[Lyndon302]

I've been in touch with Pauter.
Just waiting on a reply.
Hopefully it's the wrong part.
I'm not modifying a perfectly good early shaft.
At least now I know it's definitely not ideal.
Lyndon

[blue911rsr]

Why are you using this gear ? It’s noisy and really only
for racing engines unless you use a gt 3 oil pump you can use
a normal aluminum gear
You will need to pull the dowels and cut some threads to use all 6 bolts
Also you will need a shim to fix the gear off set
Walt Watson at completion engineering makes them
Done this many times without issues
Now if you use the big pump it will eat that aluminum gear
over time not a problem with race engine due to frequent rebuilds
But street car is another story

[Lyndon302]

I'm having trouble getting a STD gear and thought this a good alternative. It's looking like the old gear will go back in.
I was of the understanding it was a bolt on replacement. The noise ii's not a concern to me. It now seems it does not fit a 67 911 engine. Mmmm
Lyndon

[gled49]

Lyndon flip your ALU gear over. It registers on on the back side. We have to buy a late ALU gear and machine to fit.

[Lyndon302]

Originally Posted by gled49

Lyndon flip your ALU gear over. It registers on on the back side. We have to buy a late ALU gear and machine to fit.

I would still have 6 holes. Not 3 with 3 dowels ??
Lyndon

[Lyndon302]

I'm a bit annoyed with all this.
They arrived with a cable tie and wrapped in news paper.
Nil packaging , instructions or part numbers and fitment info.
On the flip side the rods were packeged. Numbered. Instructions and fitment.
I bought these as a fit just like the rods. Some mention that they won't fit without maching would have been nice. I'm sure the rods or at least hope are are a bolt on.
Lyndon

[stownsen914]

It's possible they don't often supply customers with the very early intermediate shafts, and just didn't know. I'd better Porsche doesn't even supply those anymore. I'm a little surprised on the packaging of the gear, but I understand Pauter's stuff is highly regarded, for whatever that's worth.

[Lyndon302]

Yes it all looks like art.
But it was all supplied for a 1967 911S.
Lyndon

[stownsen914]

Rather annoying, I can understand that. It may be worth keeping in mind the other options to find a direct fit replacement for your gear are probably limited, even from Porsche. It's entirely possible there isn't one.

[dannobee]

I doubt that the correct aluminum 3 hole gear is even made anymore. You'll need to have a machinist remove the dowels and drill and tap the holes to "update" it to the 6 bolt hole shaft.

Or, I suppose you can have some bushings made up to fit, then stake the gear so that they can't fall out (just like the original gear in your pic). Or make up some stepped dowels.

[gled49]

What danbee says is the way to go. Sense the gear registers on the machined step of the gear, the exact precision of the drilling and taping doesn’t matter, just so it will bolt down. But the new gears has a slightly different offset. Get the new gear and machine as necessary, it can be done.

[faapgar]

I have the correct gear in excellent condition if you need one.Size 0.