#pontiac

We return to the Turbo-Hydramatic once more today, and our third installment sees us at a critical point in the timeline of the automatic transmission. Fuel economy pressure from the government and performance demands of the consumer increased considerably in the intervening years since the THM’s debut in 1964. That meant the creation of lighter, more compact, and cheaper versions of the Turbo-Hydramatic compared to its flagship shifter, the THM400. GM branched out into the likes of the THM350, THM250, and the very problematic THM200.

In 1987, GM stepped away from the traditional THM naming scheme and switched to a new combination of letters and numbers. Number of gears, layout, and strength combined to turn the THM400 into the 3L80. But the hefty gearbox was already limited by then to heavier truck applications; passenger cars moved on to four forward gears after the dawn of the Eighties.

Our Abandoned History coverage of the Turbo-Hydramatic transmission series continues today. The THM was a singular solution to two different automatic transmissions in use by Oldsmobile, Cadillac, and Buick in 1963. Turbo-Hydramatic arrived at a time of modernization for the automatic, which prior to the mid-Sixties was regarded as inefficient and less than smooth.

The THM400 was the 1964 replacement for the Hydra-Matic and Buick’s Dynaflow and established itself as a smooth and reliable gearbox. It proved useful in a variety of luxury and heavy-duty applications and shrugged off weight and torque easily. In short order, it took off as the transmission of choice for various small manufacturers outside of GM. However, no matter how excellent the THM400 was, it found itself squeezed by a drive toward greater fuel efficiency. It was also a bit hefty to be of broad use in smaller or lighter passenger cars. GM needed more Turbo-Hydramatics!

A few weeks ago, we concluded Abandoned History’s two-part coverage of the Chrysler UltraDrive transmission. Within the comments was a request for more transmission coverage of an equally abandoned nature. Let it be so! Come along as we discuss the vast automatically shifted expanse that was the Turbo-Hydramatic transmission family, by General Motors.

We started our coverage of GM’s Eighties and Nineties branding adventures last week, with the short-lived experiment that was Passport. The dealership network was an amalgamation of GM-owned or influenced brands from Japan, Sweden, and in the case of the Passport Optima, South Korea. Passport lasted from 1987 through 1991 before GM changed directions. In addition to axing an unsuccessful sales channel, Geo and Saturn cars had arrived during Passport’s tenure and made things more complicated. Let’s learn some more about GM’s Canadian dealership networks.

In the Eighties and Nineties, General Motors of Canada decided to try new distribution strategies for its imported cars. Like in the recent Dodge Colt series, General Motors had its own captive import cars and trucks that were manufactured by other brands. But because of dealership arrangements in Canada, GM took things a step further than Chrysler and established a separate distribution network for its imported wares. The efforts lead to the thrilling Passport and Asüna brands for the Canadian market. First up, Passport.

The General built cars based on the front-wheel-drive A platform (no, not that other GM A platform) for the 1982 through 1996 model years, with the profoundly unmemorable Chevy Celebrity as the most numerous type. Of all the millions of these A-Bodies that roamed American roads, the most interesting was the Pontiac 6000 Special Touring Edition, a sporty sedan version made to compete with the growing menace of speedy German and technology-stuffed Japanese machines. I managed to find an extremely rare early 6000 STE in a California boneyard in December, so let’s take a look.

We return to the saga of GM’s High Technology engine today, after taking a diesel detour in our last entry. Concurrent in the High Technology engine’s timeline, the Oldsmobile diesel’s failure was quick, but certainly not painless. It put the majority of American consumers off the idea of a passenger car equipped with a diesel engine. And by the time GM pulled the diesel from its various brand lineups, there was a strategy change over in HT4100 land: Not calling the engine HT anymore.

In today’s edition of Abandoned History, we return once more to the late Seventies engines of General Motors. After the disaster which was the V8-6-4 and the subsequent release of the quite flawed HT4100 V8, we take a sidestep today into diesel. Time for a turn with the cost-cut cast iron Oldsmobile oil burner that accompanied the troubled gasoline engines at GM dealerships across the country.

The Pontiac Grand Prix started life as a sporty hardtop coupe version of the full-size 1962 Catalina, then spent the 1969 through 1987 model years as a midsize rear-wheel-drive sibling to the Chevy Monte Carlo. For 1988, the Grand Prix moved to the brand-new front-wheel-drive W platform, immediately winning Motor Trend’s Car of the Year award and carrying on John DeLorean’s tradition of affordable personal luxury cars with a rakish bad-boy-in-a-suit image. Here’s an ultra-rare example of the most expensive Grand Prix available for 1990, found in a Denver-area self-service yard last month.

Several hooptie-centric road rallies take place every warm season in Front Range Colorado, including the 24 Hours of Lemons Rally, the Rocky Mountain Rambler 500 Rally, and the Colorado Gambler 500 Rally. Teams will build crazy stuff— say, a Lincoln Continental Mark IV filled with three tons of engine-heated water or a gutted Volkswagen R32 converted to a doorless post-apocalyptic Astroturf nightmare— or just acquire some random cheap car, decorate it, and beat it half to death on Rocky Mountain fire roads. As you’d expect, many of these cars go right to the nearest boneyard when the rally is over, and I find quite a few of them during my junkyard travels in northeastern Colorado. Here’s the “Good Vibes” Pontiac Vibe, found in Denver over the summer.

The Pontiac Grand Prix was a long-term staple in Pontiac’s lineup, a Driving Excitement alternative to the Buick and Chevrolet cars with which it shared its various platforms. Though it faded from its initial personal luxury prominence, Grand Prix had one final V8 hurrah at the end of its life. It was a sort of return to form after many years with a maximum of six cylinders. Let’s check out some GXP goodness.

From the time of John DeLorean’s money-printing 1962 Grand Prix through the model’s demise two years before the Pontiac Division itself got Old Yeller-ized by The General, Americans bought huge numbers of the sporty-looking Grand Prix. I’ve documented these cars in junkyards going back to 1969, but the LS-powered Grand Prix GXP of the Grand Prix’s final generation had eluded me… until now. Here’s one of those rare machines in a Denver-area yard.

Today’s Rare Ride is an ever-desirable Pontiac Fiero dressed in an elegant, Canadian-designed fiberglass body.

Let’s talk about a forgotten car with two fake names: Enterra Vipre

To many children of the 1970s and 80s, the Pontiac Fiero is something of a tragic figure. Its mid-engine chassis and clean, sporty lines made performance promises that its 2.5L OHV, 92 horsepower “Iron Duke” could never deliver on. Even later models, with their 140 HP, 2.8L V6 engines were disappointments – albeit lesser ones. Despite continuous improvements, the car was only in production for four years, and ultimately became more sought-after as the basis for a number of ill-conceived Faux-rrari kit cars than for what it was … but it didn’t have to be this way.

Across town, Pontiac’s GM stablemate Oldsmobile had something that could have changed the fate of Pontiac’s Fiero – and maybe the Chevrolet Corvette’s, too – and that’s the subject of this first engine swap fantasy file: the Quad 4.

We continue our 2007 and 1997 sedan series with its fourth installment. We’ve covered V6 Japanese sedans from two different decades, as well as American-branded entries from 2007. Today we step back to the midsize V6 sedan class of 1997. The Big Three beckon you with medium build quality, equipment, and value for money in a midsize sedan; a segment in which only GM deigns to participate in 2020. Let’s go.