After 1986 when the series was bought by Glenn Donnelly of DIRT (Drivers Independent Race Tracks) the GATR trucks became highly modified with the bodies being cut and lowered, losing the tag axle and shedding more than 2,000 pounds in weight.
After 1986, when the GATR trucks were acquired by Glenn Donnelly of DIRT (Drivers Independent Race Tracks), they underwent significant modifications, including bodywork alterations, lowering, removal of the tag axle, and a substantial reduction in weight exceeding 2,000 pounds.