904
Gearbox housing with steel insert
Parts catalogue
Porsche Gearbox Parts made in-house.
Newly made in Ottrau, Germany.
43 parts for the 904, 906, 901, 356 and 915: housings, clutch-type LSDs, final drives, gear pairs, axles, mounts and shift linkage. Most are finished and in stock. Every part says what it is — click to enlarge, enquire with one click.
Racing gearboxes
Porsche 904 & 906
Magnesium housings and covers with cast-in steel insert, ZF clutch-type LSD with Nadella flanges, 7:31 final drive, homologated gear sets, mounts, shift and clutch linkage — newly made for the 904 and 906.
906
Magnesium side cover
906
Steel insert, cast into the housing
906 gearbox intermediate plate: steel bearing insert cast into the housing.
904
Steel insert, cast into the housing
906
Magnesium bell housing with steel insert
904 / 906
ZF clutch-type LSD, uprated
Porsche 904/906 ZF clutch-type limited-slip differential, uprated version with Nadella flanges.
901 / 904 / 906
Final drive 7:31, uprated
Porsche 901/904/906 final drive, uprated version, ratio 7:31, top quality.
904 / 906
Homologated gear sets
Homologated gear sets for the 904 and 906 in Nürburgring or standard ratios.
904 / 906
Gear pair “Y”
901 / 904 / 906
1st gear 14:37
1st gear for the 904, 906 and 901 = 14:37.
904 / 906
Gear pair 28:23 = 0.82
Gear pair 28:23 = 0.82 for the 904/906.
904 / 906
Nadella flange with sealing cap
906
Gearbox mount
904
Gearbox mount
906
Exhaust bracket
906
Exhaust bracket, second side
904 / 906
Spring-loaded reverse lock-out
Spring-loaded reverse gear lock-out as used by Porsche Motorsport, for 904/906 gearboxes.
904 / 906
Reverse lock-out, detail
904 / 906
Release lever
904 / 906
Release lever, detail
904 / 906
Shift finger with bracket
904 / 906
Shift finger
904 / 906
Clutch rocker, clutch rod, release lever
Porsche 904/906 clutch rocker with bracket, clutch rod and release lever.
904 / 906
Clutch rod with ball nut
Five-speed gearbox 911/912
Porsche 901
Ring gear and pinion of the uprated 7:31 final drive, cleanly ground. The complete final drive and the 1st gear 14:37 for the 901 gearbox are listed under 904 & 906.
901
Ring gear 7:31, ground
Porsche 901 final drive 7:31, uprated version, ground to top quality.
901
Ring gear – fits and teeth
All fits and gear teeth cleanly ground.
901
Pinion, ground
Porsche 901 pinion, top quality, cleanly ground.
Gearboxes 519 and 716
Porsche 356
CrMo steel differential carrier with 12-bolt mounting, uprated 7:31 final drive, long 4th gear 21:28 and uprated swing axles for engine outputs from 110 hp.
356
Steel differential carrier
356
CrMo differential carrier, 12-bolt – new vs. original
Steel carrier, uprated version with 12 mounting holes, made from CrMo steel. Left: uprated part, right: original part with damage.
356
Final drive 7:31, uprated, 12-bolt
356 final drive 7:31, uprated version with 12-bolt mounting.
356
Long 4th gear 21:28 = 0.75
Long 4th gear 21:28 = 0.75 for the 519 and 716 gearboxes (synchromesh).
356
Uprated swing axles from 110 hp
Uprated swing axles for the 356 for engine outputs from 110 hp, with matched splines in the brake drums / wheel hubs.
356
Swing axle, splines
356 swing axles, cleanly finished.
911, Turbo and Group 5
Porsche 915, 930 & 935
ZF clutch-type LSD with oil pump drive and Turbo stub axles for the 915/72 gearbox, LSD internals for the 915, 930 and 935, and the 8:35 Motorsport final drive replacing the 7:31.
915 / 930 / 935
ZF clutch-type LSD internals
Internal parts of the ZF clutch-type limited-slip differential for Porsche 915, 930 and 935.
915 / 930 / 935
Planet gears with shafts
915 / 930 / 935
Side gear
Porsche differential side gear, cleanly cut and machined.
915 / 930 / 935
Pressure rings, interchangeable set-up
Pressure rings with interchangeable set-up for the Porsche ZF clutch-type LSD.
915
ZF clutch-type LSD with oil pump drive, 915/72
Porsche ZF clutch-type LSD with oil pump drive and Turbo stub axles for the Porsche 915/72 gearbox with oil cooler coil. No longer available from Porsche for a long time.
915
Motorsport final drive 8:35
Porsche Motorsport final drive 8:35 in top quality, replacing the 7:31 whose tooth spread at the pinion head is unfavourable and damaged on almost every second gearbox.
915
Final drive 8:35, detail
Final drive 8:35, cleanly machined.
Rebuild & gear cutting
For all Porsche gearboxes
Genuine Porsche spare parts and bearing kits for the gearbox rebuild — and an example of what we cut from a sample, pattern or drawing.
Porsche gearboxes
Genuine Porsche spare parts
We use genuine Porsche spare parts only.
Porsche gearboxes
Porsche bearing kit
Porsche gearboxes
Gear parts from a sample – BMW M1
Gear parts made from a sample, pattern or drawing — here the camshaft drive of a BMW M1 engine.
Common questions
01 Are the parts shown newly made or overhauled?
The housings, LSDs, final drives, gear pairs, axles, mounts and shift linkage shown here come from our own production and are new. Exceptions are labelled as such, for example genuine Porsche spare parts and bearing kits for the rebuild.
02 Are the parts available immediately?
Parts marked "In stock" are finished and on the shelf at our workshop in Ottrau, Germany. What is not in stock we make to sample or drawing.
03 How do I enquire about a part?
Use the "Enquire" link on each part. The enquiry form takes over part and gearbox type, you add vehicle and contact details. Reply usually within 24 hours.
Inquiry
What is on your bench?
Gearbox type and a few lines about your request — that is all we need for a first assessment. A photo helps but is not required. The answer comes from the machinist, not from sales.
Send inquiry
Reply usually within 24 hours — from the managing director himself, no ticket system, no call centre. We call back on request.
or directly: 06628 9159093 · info@antriebstechnik-schmidt.de