Mahindra 1538 HST 4WD T4 refers to a specific model of Mahindra tractor. The "Mahindra 1538 HST 4WD T4 " designation typically indicates the series or model range of the tractor. "HST" typically stands for Hydrostatic Transmission, which is a type of automatic transmission. 4WD stands for the four wheel drive.We sell quality replacement Mahindra Tractor Parts for your Mahindra 1538 HST 4WD T4. Buy online or call to place order.