Hi Wes here again, earlier I remarked about how you check the oil level by measuring the length of the Rubber Bellows ,well the author of that instruction sheet has got it unclear & all totally wrong, the purpose of the bellows is to prevent any air being in the pump / motor section of the transaxle case. You position your case with the hole for the bellows at the top, you then fill the pump chamber with oil nearly to the top 1/2 " , you rotate the pump in neutral ,forward, reverse , repeat all a few times to expel all the air from pump and motor. NOW - With the Bellows compressed you install it and the cover plate to transaxle, You then slowly release the bellows so it can expand and force the extra unwanted oil out of the case, When the Bellows reaches the correct length you lock up all of the four cover screws. The end result is there is no air in the pump section. If there is air present in the pump chamber it can enter the oil & then you can have aeration which causes loss of pressure and naturally also loss of drive. As the oil becomes hotter the Bellows compress to allow for the expanding oil. So as you can now understand the pump chamber must also have excellent seals on Output / Impute / Shift SHAFTS. One air leak and you have lost your drive when hot. This type of transaxle must be removed from the vehicle to change or check oil level. sEEYA!wES!
