Profile, Abilities and Weaknesses description from The Transformers G1 series by Marvel Comics.

Profile: Slapdash is not a good team player. He is typically disorganized, neglectful and sloppy.
He is rarely knowledgeable of any strategy that he's supposed to follow since he usually forgets to enter it into his memory banks. He's been known to plunge into battle without his weapon, or worse, with an empty fuel tank. Sometimes he even forgets to bring Lube along. Without his binary-bonded partner, Slapdash loses the ability to transform. It usually falls upon his Autobot comrades to pay the price of his mistakes. They're the ones who have to cover for him when he's unarmed or haul him back to the Autobot base camp when he's out of energy. Slapdash is lucky that they're as willing to do these favors for him as they are. If he weren't such an easy-going, generous and good-natured fellow, his friends might have stopped acting so friendly a long time ago.

At the Hi Q Industrial Research Complex on the planet Nebulos, Lube specialized in fuel technology.
Under the direction of the Complex's director, Hi Q, it was Lube who made the research breakthrough that led to the tainting of all Nebulan fuel sources. This prevented any Transformer from coming to Nebulos and ingesting that planet's fuel without poisoning himself.  Soon after, the Decepticons Darkwing and Dreadwind arrived and threatened
the planet. A team of Autobots eventually tried to chase the deadly duo away, but without access to a non-toxic fuel source to supply their needs, they were unable to do it on their own. Ironically, this turn of events persuaded Lube to help the very beings he had endangered. He underwent the Powermaster Process and became binary bonded to Slapdash so that he could assist the Autobots in their fight against the Decepticons. Lube is known for his meticulousness and short temper, characteristics that usually put him at odds with the slovenly Slapdash.

Abilitles: Slapdash transforms into a ground racing vehicle. In this mode he can reach a maximum speed of 600 miles per hour and has a maximum range of 1800 miles...when he remembers to fill up his tank. In both robot and vehicle modes he is armed with a powerful electro-magnetizer gun, which has the ability to neutralize and drain the power supply of almost any machine its beam hits. He reserves its usage almost exclusively for enemy Decepticons. Lube has the ability to transform into Slapdash's engine. In this mode he acts as Slapdash's power source and can process almost any fuel source into usable form.

Weaknesses: Virtually all of Slapdash's weaknesses are self inflicted and easily preventable. His careless nature is his greatest problem by far. 

Bibliography of significant Autobot Powermaster appearances (in US, G1 stories): 

* (Marvel) Transformers #42- The one and only G1 'origin of the Powermasters story (Autobots and Decepticons.)
* (Marvel) Transformers 80 - Getaway gets nailed by Dreadwing, the combined form of the Decepticon Powermasters
* (Dreamwave) Transformers, The War Within: The Age of Wrath, includes an all-to-brief appearance of each of the Autobot Powermasters.

Other Appearances: