Holden Monaro, HQ

Manual transmission fluid capacity & service interval

Holden Monaro, HQ manual transmission fluid capacity is 2,13 liters. Service intervals include checks at 10000 km or 12 months and changes at 20000 km or 12 months. The data covers 8 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
Monaro V8 GTS, HQ 253 LC (1971-1974)
  • Use: Normal
  • Capacity 2,13 liter
  • Check 10000 km/ 12 months
  • Change 20000 km/ 12 months
  • Code: 3/1
Monaro V8 GTS, HQ 253 LC (1971-1974)
  • Use: Normal
  • Capacity 2,13 liter
  • Check 10000 km/ 12 months
  • Change 20000 km/ 12 months
  • Code: 4/1
Monaro V8 GTS, HQ 253 HC (1971-1974)
  • Use: Normal
  • Capacity 2,13 liter
  • Check 10000 km/ 12 months
  • Change 20000 km/ 12 months
  • Code: 3/1
Monaro V8 GTS, HQ 253 HC (1971-1974)
  • Use: Normal
  • Capacity 2,13 liter
  • Check 10000 km/ 12 months
  • Change 20000 km/ 12 months
  • Code: 4/1
Monaro V8 GTS, HQ 308 HC (1971-1974)
  • Use: Normal
  • Capacity 2,13 liter
  • Check 10000 km/ 12 months
  • Change 20000 km/ 12 months
  • Code: 3/1
Monaro V8 GTS, HQ 308 HC (1971-1974)
  • Use: Normal
  • Capacity 2,13 liter
  • Check 10000 km/ 12 months
  • Change 20000 km/ 12 months
  • Code: 4/1
Monaro V8 GTS 350, HQ 350 HC (1971-1974)
  • Use: Normal
  • Capacity 2,13 liter
  • Check 10000 km/ 12 months
  • Change 20000 km/ 12 months
  • Code: 3/1
Monaro V8 GTS 350, HQ 350 HC (1971-1974)
  • Use: Normal
  • Capacity 2,13 liter
  • Check 10000 km/ 12 months
  • Change 20000 km/ 12 months
  • Code: 4/1

Additional Notes

  • The Holden Monaro HQ manual transmission fluid capacity is 2.13 liters across all listed configurations, spanning the 253 LC, 253 HC, 308 HC, and 350 HC engine variants for 1971-1974.
  • A 2.13-liter figure is consistent with a service fill capacity, meaning the amount of fluid required when refilling a transmission already installed in the vehicle, rather than a full bench-overhaul fill where additional fluid may be needed to prime internal passages.
  • The fluid check interval is set at every 10,000 km or 12 months under normal use conditions, whichever comes first, applying equally to the 253, 308, and 350 engine variants.
  • The fluid change interval is 20,000 km or 12 months under normal use conditions, meaning the time-based trigger of 12 months can initiate a change even before the distance threshold is reached.
  • The check interval of 10,000 km sits at exactly half the 20,000 km change interval, a relationship that allows one intermediate inspection between each scheduled fluid replacement.
  • The 350 HC variant, designated the GTS 350, shares an identical 2.13-liter manual transmission fluid capacity and the same check and change intervals as the lower-displacement 253 and 308 HC configurations, indicating a common transmission unit across the range.

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