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Torana LH LX 1974-1976 Sunbird LX 1976-1978 Gregorys Service Repair Manual USED

March 1974 had the first completely new Torana body, with the arrival of the larger mid-sized LH series, produced in four-door sedan style only. Despite the larger external size, the car was relatively cramped by mid-1970s standards. It resembled other GM products of its generation, notably the Opel Ascona and particularly in overall size and profile, the FE series Vauxhall Victor. It was unique in that, following the addition of a four-cylinder option in May 1974, the same body style was available with a choice of inline-four, inline-six, or V8 engines, specifically, 1.9-litre Opel four, 2.85- and 3.3-litre Holden 'red' sixes, and 4.2- and 5.0-litre Holden V8s. Low-compression versions of the fours and sixes were also available for export markets.

Exports to the Philippines also occurred, where it was sold as the "Holden 1900".The 5.0-litre engine was reserved for the sporting LH Torana SL/R 5000 sedan. A special build derivative of the SL/R 5000 was the Bathurst-intended 'L34 Option', of which only 263 were built, with a higher-compression engine with stouter components for more power and durability in competition use. The most notable external feature of the L34 was the bolt-on wheel arch extensions, designed to accommodate the larger racing rims and tyres.

The L34 option, which was first seen in 1975, proved to be fast and successful, yet fragile, in Australian touring car racing. It was eventually superseded by the evolutionary A9X option made available in the LX Torana series in 1977. The A9X was delivered with a standard 5.0, but used the L34 motor in races which was developed by Repco for the LH SL/R 5000 H.O. L34. The A9X version of the Torana had a larger 10-bolt Salisbury differential with disc brakes and had the option of the Borg Warner Super T10 four-speed. Hardly any cars were delivered with Super T10 option, so in effect the immortalized A9X was a pretty stock car with a better differential and suspension. The LH Torana in L34 form won the Bathurst 1000 touring car race with Peter Brock and Brian Sampson in 1975 and with Bob Morris and John Fitzpatrick in 1976, with the L34 motor being fitted to the A9X, so in effect winning with that car, as well.

According to Holden Dealer Team boss Harry Firth, Holden chose to have the V8 engine in the SL/R 5000 developed by Repco on their dyno which led to massive oil surge problems on the race track and had a number of teams, including the HDT, suffer numerous engine failures in both testing and races in 1974. Firth believed that using the same V8 engine he had developed for the stillborn V8 GTR XU-1 would have solved this problem, as the HDT had already cured the oil problems, but Holden ignored his warnings.

Prototype wagon and hatchback versions of the LH Torana were built, but never reached production. Overall, a total of 70,184 LH Toranas were built. A few special models of the LH were built, the somewhat sporting Plus 4 and G-Pak models. The Plus 4 arrived in September 1974 and was an attempt to move a few more of the slow-selling four-cylinder models. The G-Pak, first seen in February 1975, received the 3.3-litre inline-six. Both came with a four-speed manual, sporting instrumentation, and disc brakes in front.

New Zealand assembly got off to a troubled start. General Motors New Zealand, which still had a wide four-cylinder Vauxhall Viva/Magnum line on sale, had planned a 2850 six 'S' model with bench front seat and three-speed column manual shift and the 3300SL with bucket seats and four-speed manual or three-speed Trimatic floor shift. The New Zealand government, though, imposed a 60% sales tax (a post-first oil crisis measure) on cars with engines over 2.7 litres just as GM launched the LH in mid-'74, and only a few of each were built. The LH was then withdrawn temporarily and relaunched some months later with the Opel 1.9-litre I4 and floor-shift manual or automatic (SL only) gearboxes. Six-cylinder Toranas would never again be built in New Zealand and were only very rare imports after this. GM New Zealand also built a local version of the Australian Plus 4 'sports' special edition, but the changes were only cosmetic - bright paint colours, special wheel trims, black stripes and all-black interior trim.

The mildly facelifted LX series arrived in February 1976. Cosmetically, the most obvious changes were to replace the LH's rectangular headlights with round headlights, side window surrounds were changed from body colour to black, and the front Holden badge was enlarged. A two-door hatchback body was introduced as an alternative to the four-door sedan, although the 1,897-cc Opel unit was not offered in the new body style. Soon after its introduction, in July 1976 the LX was subjected to performance-reducing engine modifications to comply with new ADR27A emission regulations. Power outputs (from now on specified in kilowatts, as part of Australia's metrication programme) changed as:

When the LX Torana was introduced, it featured a choice of four-, six-, and eight-cylinder engines. In November 1976 the four-cylinder Torana was revised and relaunched as the Holden LX Sunbird. Reflecting the new emissions rules, power from the Opel-sourced engine was down from 76 to 72 kW (102 to 96 hp). From this point, all four-cylinder models were marketed as Sunbirds and the six- or eight-cylinder models as Toranas. The original LX series Sunbird was a single-trim range, with four-speed manual and three-speed automatic transmissions. There were minor trim differences compared to the Torana, notably the grille (with vertical bars) and distinctive chrome wheel covers. It was marketed as a four-door sedan and as a three-door hatchback, unlike the short-lived four-cylinder LX Torana.The introduction of Sunbird also coincided with the first attempt by Holden to add a handling package to its range of cars. The introduction of 'radial-tuned suspension' (RTS) began with the LX Sunbird sedan and hatchback and then the LX Torana.

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