901 8:35 Ring and Pinion

[gled49]

Has anyone ever seen a 901 8:35 ring and pinion. Pinion is date code 3/68 and ring gear is 6/68. It has the conventional stretch bolt not the castle nut like 906/911R. Gordon

[chris_seven]

I thought Klingelnberg spiral bevels were always lapped together as a pair so the different dates seems odd.

Do you have a photo of the ring gear?

[davep]

This is a question for Grady. I have not come across it before.

[gled49]

Correction, the ring gear does have a 3/68 date code with what looks like a Hurth stamp. It has the matching #532. Also has 901 332 252 00 stamped but can not find that number anywhere. There are alternate part #'s for the 7:31 901 332 251 01 and 6:29 901 332 251 11 and there was a 6:32 in the Sports Purpose guide with no part numbers. Come on Techies, Gordon

[kenikh]

Geez Gordon, if you haven't seen it before, this is definitely something...there aren't many folks, even on this site that I can think of that have a shot. I think Matt Monson might have been cutting 8:35 recently, but this is clearly not a new part.

Grady is the best bet. Ralph Meaney maybe.

[edmayo]

I think only Frau Baer knows the answer

[2.5MFI]

I think this might be from an early 908 before the 6-speed gearbox. Whatever it's from, it's very rare.

[2.5MFI]

Well I take it back, not from a 908 as that was a totality different gearbox. My guess would be anything from a late 904, 906 or 910. Problem is most of the racing gearbox part numbers started with something like 916 xxx xxx instead of a 901 number. Also it's has an open diff not a LS diff like most of the race cars had. But looking at the picture of the pinion it appears the pinion head is hollowed out like most of the race gearbox's were. Nice find Gordon.

[davep]

It does have a 901 part #, so that suggests a 911 application not 822 or 904.
Have emailed Grady.

[2.5MFI]

And I guess since it also has the conventional stretch bolt that might eliminate the 906 & 910 use?