Buick Special, Skylark (USA / CAN)

Additional Notes

• Across all configurations in the Buick Special and Skylark lineup for 1961-1963, the rear differential fluid capacity is uniformly 1.2 liters, applying equally to both standard and limited slip differential variants.
• The 1.2-liter figure represents a service fill capacity, which is the amount of fluid required during a routine top-up or fluid change rather than a full overhaul or dry fill of a disassembled unit.
• The Buick Special V6 (1962-1963) carries a rear differential check interval of 9,000 km under normal use conditions, for both the standard and limited slip rear differential.
• The Skylark (1961-1963) and Special V8 (1961-1963) share a notably shorter rear differential check interval of 1,500 km under normal use conditions, compared to the 9,000 km interval assigned to the Special V6.
• The 1,500 km check interval on the Skylark and Special V8 is considerably more frequent than what is typical for rear differential service, suggesting a monitoring-focused schedule rather than a full fluid replacement at each interval.
• The Special V6 configuration was introduced in 1962, making 1961 a year in which only the Skylark and Special V8 rear differential specifications applied within the lineup covered here.
• Limited slip differentials across all three configurations share identical capacity and check interval values with their standard rear differential counterparts, with no separate specification assigned to the limited slip variant in any row.