Question about Cars & Trucks
Posted by Anonymous on
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Posted on Jan 02, 2017
the level of oil in a manual transmission has little bearing in the shift operation of the transmission as all it does is lubricate the working parts
excessive oil will overload the input shaft seal and may cause oil getting to the clutch plate or leaking out of the drive shaft seal
However the quality of oil used will have a bearing on the shifting of the gears
If the oil is too heavy ( viscosity above 80 oep) it affects the ability of the synchro mechanisms to work especially in fast shifting requirements
if it is too low ( 30 or less) it affects the wear or the gears and bearings and again will not have the shear strength to allow the synchros to engage properly with out causing excessive wear
From your question and problem description, I suspect that the problem is not in the transmission or oil level but in the clutch operation
If the clutch plate is not properly disengaging, the engine revolutions will not allow the synchros of the gears to operate properly and make shifting near impossible
so check the oil used and the level and fill to the level specified by the manufacturer
check and adjust the clutch for correct operation as there may be a problem in the slave cylinder/ master cylinder / cable operation that is not allowing complete disengagement of the cluch
Posted on Sep 01, 2016
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