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A Regular Production Option (RPO) is a 3-digit standardized code used by General Motors to designate vehicle options & modifications. RPO codes designate how a vehicle is built, and they've been used on dealership order forms and in assembly plants since at least the 1950s ( see Corvette C1 ).
GM's Automatic Safety Transmission (AST) was a semi-automatic transmission released in 1937. The first mass-produced fully-automatic transmission developed for passenger automobile use was the GM Hydramatic introduced in 1940. [1] The Hydramatic was a big success, and had been installed in the majority of GM models by 1950.
Download QR code; Print/export Download as PDF; Printable version; In other projects ... General Motors used the AY-6 as RPO MV1, MV5, and MV7. MV5
In 1982, GM introduced a 4.3-liter V6 for longitudinal and transverse applications. All versions of the engine were rated at 85 bhp (63 kW) at 3600 rpm and 165 lb⋅ft (224 N⋅m) at 1600 rpm. All versions of the engine were rated at 85 bhp (63 kW) at 3600 rpm and 165 lb⋅ft (224 N⋅m) at 1600 rpm.
An updated 4L60E, the 4L65E (RPO M32), was phased in the 2001 model year when coupled behind the 6.0 Vortec. Five-pinion front and rear planetaries, along with an additional 3/4 clutch allowing 7 clutches in the input housing and induction hardened input shaft assembly, were improved to withstand up to 380 ft⋅lb (520 N⋅m) of torque.
The first version, RPO code MG2 was used for all GM V6 applications (FWD and the RWD Fiero) and the second version, RPO code MG1, was used for the 2.0 L turbocharged engine used by Pontiac and Buick. Gear ratios are given below, as taken from the GM Product Service Training Manual. MG2 and MG1 ratios: 1st gear: 3.50:1
The 6.6L Duramax diesel engine (VIN code "L") is used on 2010 interim and 2011 Chevrolet Express and GMC Savana vans and 2011 Chevrolet Silverado/GMC Sierra HD trucks with RPO ZW9 (chassis cabs or trucks with pickup box delete). The LGH engine is rated at 335 bhp (250 kW) at 3,100 rpm and 685 lb⋅ft (929 N⋅m) at 1,600 rpm.
GM started using the ZF S6-650 in 2001 with some alterations, making this transmission different from the Ford version. [ citation needed ] The S6-650 will likely be the last manual transmission GM and Ford will use in their heavy pick ups, due to advancements in automatic transmission technology and low consumer demand for manual transmissions.