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Search took 0.12 seconds. Search: Posts Made By: kevingross
Forum: Porsche 911 Technical Forum 12-17-2025, 07:02 PM
Replies: 6
Views: 322
Posted By kevingross
Dennis, this nut was unique to Porsche and is...

Dennis, this nut was unique to Porsche and is long NLA. It was thicker than a DIN 934 hex nut and appears to have had something like a Helicoil installed in it. Just use DIN 934 nuts... unless you...
Forum: Porsche 911 Technical Forum 12-15-2025, 04:55 PM
Replies: 7
Views: 362
Posted By kevingross
Never seen a spec. What problem are you trying...

Never seen a spec. What problem are you trying to solve?
Forum: Porsche 911 Technical Forum 12-02-2025, 06:22 PM
Replies: 7
Views: 360
Posted By kevingross
I use a very thin smear of a high-pressure grease...

I use a very thin smear of a high-pressure grease on the guide tube.
Forum: Porsche 911 Technical Forum 11-13-2025, 09:49 AM
Replies: 13
Views: 540
Posted By kevingross
I agree to start with blowing the dust out -- and...

I agree to start with blowing the dust out -- and don't inhale it. Depending on aluminum versus magnesium case, and how much moisture the transmission has seen over its lifetime, you may get...
Forum: Porsche 911 Technical Forum 11-05-2025, 10:27 AM
Replies: 7
Views: 350
Posted By kevingross
https://www.youtube.com/watch?v=b-6bUQT8iaE ...

https://www.youtube.com/watch?v=b-6bUQT8iaE

It's a different transmission, but the tool they recommend will help and the overall process is the same.
Forum: Porsche 911 Technical Forum 11-05-2025, 10:24 AM
Replies: 39
Views: 2,025
Posted By kevingross
You make an interesting and important point. In...

You make an interesting and important point. In my town (in MA) and the surrounding area, they has been strong upward trend in enrollment by high schoolers in vocational schools, for us Minuteman HS...
Forum: Porsche 911 Technical Forum 11-01-2025, 01:45 PM
Replies: 39
Views: 2,025
Posted By kevingross
Hey John, good to hear from you, albeit...

Hey John, good to hear from you, albeit electronically.

Sadly, we lost two terrific Porsche people in eastern Massachusetts in recent years. My good friends Bill Pfister (Eurotech Advanced,...
Forum: Porsche 911 Technical Forum 10-15-2025, 05:23 PM
Replies: 3
Views: 285
Posted By kevingross
For your '72 915, you'll need the VW521/4 locking...

For your '72 915, you'll need the VW521/4 locking sleeve and the 9145 sleeve. The 9145 works with pretty much all differentials that use either a 50x80 or 50x90 differential carrier bearing. The VW...
Forum: Porsche 911 Technical Forum 10-15-2025, 05:08 PM
Replies: 18
Views: 556
Posted By kevingross
I like the Patrick kit in that it both keeps the...

I like the Patrick kit in that it both keeps the lines short and keeps the radiator away from the engine's heat. I am not sure how much airflow it gets as pictured on their web page. My approach...
Forum: Porsche 911 Technical Forum 09-25-2025, 10:06 AM
Replies: 26
Views: 1,337
Posted By kevingross
I consider the one-piece bearing plate a "must...

I consider the one-piece bearing plate a "must do." Guard, CMS, and Wevo all make them.

The billet side cover is a bit more situational, but it's never a bad idea. Certainly if you have a...
Forum: Porsche 911 Technical Forum 09-24-2025, 04:26 PM
Replies: 1
Views: 163
Posted By kevingross
I would check with Kaaz as to what they recommend...

I would check with Kaaz as to what they recommend for break-away. Break-away torque should be measured with the differential on the bench, not in the car, where you won't get good data. The best...
Forum: Porsche 911 Technical Forum 09-24-2025, 04:22 PM
Replies: 26
Views: 1,337
Posted By kevingross
Getting back to your photos, the dimple on 1st...

Getting back to your photos, the dimple on 1st gear is normal.

Your synchros are heavily worn and should be replaced, along with their mating shift sleeves. Your dog teeth do not look horrible,...
Forum: Porsche 911 Technical Forum 09-24-2025, 04:16 PM
Replies: 45
Views: 1,654
Posted By kevingross
Like Matt, I have not seen a high rate of...

Like Matt, I have not seen a high rate of failure. That said, if I were rebuilding one of these transmissions in a car that has or will spend time on track, updating this shaft seems like a prudent...
Forum: Porsche 911 Technical Forum 09-01-2025, 07:33 PM
Replies: 45
Views: 1,654
Posted By kevingross
Yeah, probably. But because you're going to be...

Yeah, probably. But because you're going to be disassembling the tensioning plate to replace its bearing shaft, I would suggest removing all the rods. They will just get in the way, and they are...
Forum: Porsche 911 Technical Forum 08-30-2025, 12:15 PM
Replies: 45
Views: 1,654
Posted By kevingross
I believe the upgraded, RS version of the part is...

I believe the upgraded, RS version of the part is 950-303-134-05. The assembly is a bit fussy to put together but not too difficult. Good luck w the repair!
Forum: Porsche 911 Technical Forum 08-29-2025, 06:58 AM
Replies: 13
Views: 350
Posted By kevingross
Was the installed dimension of the 4th synchro...

Was the installed dimension of the 4th synchro installed on old dog ring measured?
Forum: Porsche 911 Technical Forum 08-24-2025, 06:30 PM
Replies: 6
Views: 291
Posted By kevingross
Porsche calls it a "bearing shaft," and it's part...

Porsche calls it a "bearing shaft," and it's part of the shift control and tensioning plate assembly. I've seen them break, serviced one earlier this year, photo below. The RS version from Porsche...
Forum: Porsche 911 Technical Forum 08-09-2025, 10:49 AM
Replies: 3
Views: 273
Posted By kevingross
A bit of a drive, but worth it: Kenny Conway at...

A bit of a drive, but worth it: Kenny Conway at Conway Autoworks in Hanover, MA. He won't come to you, you would have to trailer the car to him. Good luck with the project.
Forum: Porsche 911 Technical Forum 08-08-2025, 09:28 AM
Replies: 53
Views: 2,881
Posted By kevingross
https://www.bendpak.com/car-lifts/mid-rise-scissor...

https://www.bendpak.com/car-lifts/mid-rise-scissor-lifts/md-6xp/
Forum: Porsche 911 Technical Forum 08-03-2025, 07:08 PM
Replies: 17
Views: 1,028
Posted By kevingross
I'll also recommend Pete Z's tutorial. If you're...

I'll also recommend Pete Z's tutorial. If you're replacing the 2nd gear synchro, you will also want to replace the 1st/2nd shift sleeve. You should measure the installed diameter of the new synchro...
Forum: Porsche 911 Technical Forum 07-29-2025, 05:53 AM
Replies: 20
Views: 896
Posted By kevingross
Bummer. Yes, that gear is done. This kind of...

Bummer. Yes, that gear is done. This kind of erosion is very common with 901 and 915 gears: they don't last forever. I've thrown many, many of these gears out because of this ilk of tooth decay.
...
Forum: Porsche 911 Technical Forum 07-28-2025, 11:52 AM
Replies: 20
Views: 896
Posted By kevingross
As others have commented, your ring-and-pinion...

As others have commented, your ring-and-pinion set should be replaced. I would not rebuild with erosion to the pinion teeth as seen in your photos.

Regardless of the erosion being on the coast...
Forum: Porsche 911 Technical Forum 07-08-2025, 05:02 PM
Replies: 17
Views: 962
Posted By kevingross
The WSM calls for 0.3 to 0.4 mm of preload in a...

The WSM calls for 0.3 to 0.4 mm of preload in a 915. So in theory you would want to have that much of a gap between the case and side cover. However, my experience has been that this method is not...
Forum: Porsche 911 Technical Forum 07-07-2025, 07:17 PM
Replies: 17
Views: 962
Posted By kevingross
Not sure I fully understand your question. ...

Not sure I fully understand your question. Typically, you install a pair of 2.50 mm shims, one on each side, along with the magnet carrier disc if your 915 is of that vintage. You then measure the...
Forum: Porsche 911 Technical Forum 06-25-2025, 05:24 PM
Replies: 20
Views: 896
Posted By kevingross
Synchros and dog teeth visually ok. I would...

Synchros and dog teeth visually ok. I would (always) measure the installed diameter of the synchro to make sure it's in spec.

Bearings look tired and ready for replacement. I agree: they don't...
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