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RTC5103 - O-Ring – ZF Automatic Gearbox by Land RoverTransmission or Gearbox Part Land Rover Range Rover Defender, Discovery, Range Rover

RTC5103 - O-Ring – ZF Automatic Gearbox

- €13,10
€13,10
€13,10 - €13,10
€13,10
Genuine Part
Genuine: Original manufacturer part. This product is the original part designed and produced by the vehicle manufacturer.
O-Ring for the ZF automatic gearbox oil pump, sealing the pump housing within the gearbox casing.

The ZF oil pump is an internally-driven unit that generates the hydraulic pressure required to engage the clutch packs and control the torque converter. This O-ring provides the hydraulic seal at the pump housing; deterioration causes ATF leakage and loss of operating pressure, which can produce incorrect shift behaviour or gearbox slip.
Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Land Rover Discovery 2 1998-2004 (L318)
Range Rover Classic up to 1994
Range Rover Classic 1994-2001 (P38)
Fitment Notes DEFENDER 1987-2006 — O-ring, ZF automatic gearbox oil pump
DISCOVERY 1 1989-1998 — ZF automatic gearbox oil pump
DISCOVERY 2 1998-2004 — ZF automatic gearbox, converter/bell housing/oil pump
RANGE ROVER P38 1994-2001 — ZF automatic gearbox, converter/bell housing/oil pump
RANGE ROVER CLASSIC 1986-1991 — ZF automatic gearbox oil pump, up to (V)HA610293
RANGE ROVER CLASSIC 1992-1994 — ZF 4-speed automatic gearbox oil pump, from (V)JA610294
Alternative Codes
RTC5103

In stock 4 units
0 · Gouda 4 · Drachten
Express delivery available

When will my order arrive?
  • Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
  • UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
  • Netherlands / Belgium / Germany: 2–4 working days.
  • Other EU countries + UK: 4–8 working days.
  • Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What does the RTC5103 O-ring do in the ZF automatic gearbox?
The RTC5103 O-ring seals the oil pump housing inside the ZF automatic gearbox. The pump generates the hydraulic pressure that engages the clutch packs and controls the torque converter, and this O-ring holds that pressure at the pump housing. It's the genuine Land Rover seal for the ZF pump.
Which Land Rovers with the ZF automatic gearbox does this O-ring fit?
This O-ring fits the ZF automatic gearbox on Land Rover Defender (1987-2006), Discovery 1, Discovery 2, Range Rover P38 and Range Rover Classic (1986-1994). It seals the gearbox oil pump housing across these ZF applications. Confirm your vehicle has the ZF automatic, not a manual, before ordering.
What happens if this gearbox O-ring fails?
A failed pump O-ring lets ATF leak past the pump housing and the gearbox loses hydraulic pressure. That typically shows as delayed or incorrect shifts, slipping, or loss of drive. Replacing this seal while the pump is accessible restores the pressure seal and avoids a repeat teardown of the ZF gearbox.

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