Question about Cars & Trucks
2007 kubota rtv 900 transmission problem
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Posted on Jan 02, 2017
SOURCE: transmission gasket for 2007 HHR
When I replace transmission/oil pan gaskets,I never re-use the old gasket as a new one is cheap and a re-used one will usually leak as you have found.
The gasket that is supplied on most transmissions is a rubber type bound to each mating surface with a heat cured RTV. this bond once broken, is difficult to reinstate as the gasket and RTV are not very pliant.
Normal RTV does not bond well with rubber gaskets and causes slippage and bulging of the gasket. Used dry, rubber gaskets are only good where the oil pan bolts are very close together, it does not bridge wide (>2in) bolt holes
When replace a transmission gasket in my shop I almost always use a new cork gasket, super clean the mating surfaces with a rotary 3M tool, solvent clean the mating surfaces with Gum-cutter, & dry with a new kitchen-roll towel/dry oil-free cotton cloth.
If you look at a cork gasket there are usually a couple of bolt holes smaller than the other bolt-holes. put the gasket on the VERY CLEAN oilpan, push 2 bolts through to the smaller holes in the gasket. The smaller holes lock the bolts in place and locates the gasket on the pan This allows you to present the gasket and oilpan lined up correctly to the bottom of the transmission.
I fingertighten those 2 bolts, then add all the other bolts to finger tight ensuring the outer edge of the gasket is always in line with the pan.
Next I tighten all the bolts in a zig-zag pattern across the pan until they are all tight to 8lb/ft (torque wrench essential - you cannot guess this really) then tighten again in same pattern to 12lb/ft The bolts are really not that tight. Some pans have different torque settings but the torque setting is really a function of the gasket thickness and not the type of pan
I really have had no problems if you are clean, dont score any marks across the faces (Dont use heavy grit sandpaper) and have DRY mating surfaces. Draining the pan properly is a must as drips will spoil the gasket join.
Posted on Jan 07, 2009
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