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.
Porsche gearboxes · Limited-slip diffs · Motorsport
Porsche Gearbox Rebuilds to Factory Spec.
Precision you can measure.
Rebuilds of classic Porsche gearboxes from the 356 to the 964, limited-slip differentials, final drives and gear parts — machined on our own equipment in Germany, much of it available from stock.
Our core business
Everything for classic Porsche gearboxes
From the 356 to the 964, from road classic to works racer: we strip, measure and rebuild air-cooled Porsche gearboxes with original factory tooling — and machine ourselves whatever the manufacturer stopped supplying long ago.
01
Gearbox rebuild
Strip, measure, rebuild — with original factory tooling, photo documentation and a test-bench run before it goes back.
02In stock, ready to ship
Ready-to-install complete gearboxes, reproduction clutch-type differentials, homologated gear pairs and final drives — no production lead time.
03Limited-slip differentials
Clutch-type unit on the ZF principle in CrMo steel, 25–75% locking — matched to road, circuit, hill climb or rally.
04Motorsport & history
Homologated gear sets and final drives for historic motorsport — ground, numbered, with measurement report.
We are a gear-cutting workshop: what the factory no longer supplies, what the standard part cannot take, and what has never existed — gets drawn, turned, gear-cut, ground and set up right here.
Specialities
01
Porsche Gearbox Rebuilds
Stripped, measured and set up to factory specification – from the 356 to the 964, with test-bench run and photo documentation.
02
Gears & Splines
Gears, shafts, limited-slip differentials and reproductions of obsolete parts – one-offs and small series, to drawing or sample.
03
Prototypes for Industry
First-sample and prototype parts for the automotive industry – turned and gear-cut parts from batch size 1, measured, not estimated.
Parts catalogue
Newly made. In stock.
Housings, clutch-type LSDs, final drives, gear pairs and axles for the 904, 906, 901, 356 and 915 — made in-house in Ottrau, Germany.
904 / 906
ZF clutch-type LSD, uprated
Porsche 904/906 ZF clutch-type limited-slip differential, uprated version with Nadella flanges.
906
Magnesium bell housing with steel insert
356
Final drive 7:31, uprated, 12-bolt
356 final drive 7:31, uprated version with 12-bolt mounting.
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.
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.
0.0025 mm ground gear-tooth tolerance, drive and coast side
25 + years of experience in gear cutting and drivetrain work
800 m² of workshop and stock space in Ottrau, Germany
15 gearbox types covered by the limited-slip programme — 901 to G50
The process
- 01
Inquiry
Describe your gearbox type, damage or drawing — by phone or via the form.
- 02
Assessment
Disassembly and measurement; for new parts, drawing creation. Then a binding quote.
- 03
Machining
Turning, gear cutting, grinding, heat treatment — on our own machines in Ottrau.
- 04
Setting up
Assembly and adjustment to factory specification, test-bench run, photo documentation.
- 05
Return shipping
Packed ready to install, with measurement report and all replaced parts.
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