Alan C.

Here's the number from a box received at a local dealer last week. 981 300 020 23

4carl

can someone confirm that the part number on the 15&16 s are the same. if so maybe all are the same and just some welds are failing. if in fact the 15s had a spline( which at this point seems to be speculation) you would think there would be a different part number. correct?

d00d

The 20160713 PET shows the replacement transmission as part 981 300 020 22.
Since most of the failures are from 2016 production (mooty and orthojoe had 2015 failures), and we have not to my knowledge seen internal pictures with a splined third, you could be right that all are EB welded and just the latter production had a weaker weld.
It could instead be that Getrag made a running change and didn't tell Porsche, and therefore replacement 981 300 020 22 is either splined or welded depending on when it was made.
Replacement 981 300 020 23 could either be splined or a stronger weld, thanks to Porsche's silence we just don't know.

4carl

this sucks!

Warwick Morris

At this point someone (independent) who has opened-up a gearbox should chime in and settled this; Splined or welded? GT Gears where are you?

Buteo

They ( GTgears) did. Either this transmission thread or the other. The gear was pulled from sharkwerks car and it was EB welded.

needmoregarage

I'll be adding a friend's 3rd gear failure to the spreadsheet. This person prefers to remain anonymous.

March 2016 build (they were not positive) and approx 10,000+ miles
Didn't give track miles which I"ll find out before I put it on the spreadsheet.

d00d

Right, but has there been a GT4 transmission that's been opened to find a splined 3rd?

GTgears

We have replaced about 2 dozen gearsets on GT4s at this point and all 3rds have been welded. But none of these cars have had a replacement gearbox in them.

I'm about to make a new batch of gears because Sharky keeps selling them all. I am going to make half a dozen stock ratio for guys who are tired of gambling.

4carl

in that case its a bad batch of welds not a design change from splined

Alan C.

I took a look at my Certificate of Authenticity and the actual production date for my car was 10/14/2015. 12,000 miles and no issues.

sharkster

If only it wasn't more fun and peppy your gears tho Come on over next time and we'll make a fun "Stock" xmas tree with the old left over gear piles we've got

GTgears

How do you come to that conclusion?

4carl

From your comment that all the gears you removed were welded. Maybe I misunderstood ?

Buteo

what makes you think ANY of the gear boxes are splined 3rd gear? Failures encompass nearly all months of production and both years ('15&'16).

I would find it odd Porsche (getrag) offered two different versions of the box (increased cost). I'd wager all are EB welded.