Here for your review are 3 USED mainshaft speed gears for Muncie 4 speed M20, M21 manual transmission. 1st gear 36 tooth, 2nd gear 30 tooth and 3rd gear 27 teeth. OE/OEM part numbers 3849388 for 1st gear, 3831746 for 2nd gear, 3831747 for 3rd gear. Used O.E. you decide! Good Luck Bidding.

ATTENTION: do not ask for shipping any other way than what is offered, we will not ship these heavy steel parts in some little mail envelope or flat rate thin no-good box just because you want it shipped cheap. We ship in new heavy box that will get this to you. Questions about alternate shipping will not be answered. If shipping fee seems too high, you can always drive here and pick it up if that seems more economical to you.