Thank you Craig. I agree completely
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904 Carrera GTS
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Hey Philip,
Glad we got the photo problem dialed in. Great shot BTW!
That bracket looks factory to me being that its a pressed piece. The rolled strengthening beads is another detail that gives that away. Most privateers during this era would not have gone through the trouble of making this intricate of a bracket. More than likely it would have been a flat base-plate with a tubular arm out to each stinger. This bracket puts me in mind of an early 356 pre-A windshield wiper motor "bat-wing" bracket. I'd say its original.
JustinJustin Rio
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Hi
the first IRS box was the 690 it was a 5 spd based on the 519 vw case. it used the jelly bean dff and the the fulcrum plates were pined to short axles the the inner part looked like a swing axle and the outer part was splined like a driveshaft. this box was the 550A box. the 718 for the RSK/RS60/RS61 etc. had a Mag case that was similar to the 644 case. The jelly bean diff ran on bigger brgs that allowed axial movement in the diff and the outer part was a conventional u joint. By Porsche design nos the next evolution was the 822 this box uses 901 gear sets there may have been 6 speeds but i have never seen any. the shift shaft attached at the bell housing and it used a clutch plate diff and Nadella axles. basically the 822 for the 8 cylinder engines and the 904/906/901/914 are based on the same internals.
j
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