was retired in favor of the overdrive-equipped 4-speed; in 1988, a 5-speed manual was the standard transmission with the 3.9L engine. A 4-speed automatic became optional during 1988 for the V6 and 5.2L engine, with a heavy-duty 4-speed automatic for the 5.9L V8 added in 1990. As part of the 1994 model revision, manual transmissions were discontinued, with Dodge becoming the final full-size van to standardize automatic transmissions. CNG powertrain In 1991, Chrysler began development of a CNG-fueled version of the Ram Van, using the 5.2L V8. After a short initial prototype production, the variant was launched into larger-scale production for 1992; approximately 2,000 were produced primarily for fleet sale. From 1994 onward, Chrysler continued development with CNG powertrains using the Dodge Caravan. Third generation (1998-2003) For 1998, the Dodge B-series van entered its third generation following its most substantial redesign since its 1971 release. To improve crash protection, the powertrain was moved further forward in the chassis; requiring a longer hood and front fenders (the wheelbase remained carryover). To further upgrade safety, the bodyshell underwent further reinforcement. As a result of moving the powertrain forward, the interior underwent its first major redesign since 1978. The engine access cover was reduced in size, adding space between the front seats and for both passengers. The dashboard was redesigned, allowing for the introduction of dual airbags and shared componentry with contemporary Chrysler vehicles. Redesigned front doors marked the deletion of front vent windows, relocating the sideview mirrors in their place (shared with the Dodge Ram/Dodge Dakota, bringing power-operated mirrors for the first time). To free up interior cargo space, the spare tire was moved from the interior to an underfloor location. Through its production, the third-generation van saw few functional changes following its 1998 introduction. Carrying over the 3.9L V6, 5.2L V8, and 5.9L V8 from the 1994 model revision, a 3-speed automatic was paired with the V6 and a 4-speed automatic was paired with the V8 engines. Variants Street van Dodge vans, particularly Tradesman vans from the 1971–1977 model years, were very popular as the basis for many custom vans during the custom van craze that occurred during the mid- to late 1970s and early 1980s. Dodge capitalized on this craze, creating a factory customization package called the "Street Van" package. This was advertised alongside the Lil' Red Express and Warlock trucks as "Adult Toys". The Street Van package consisted of