Need help with transmission air leak... Eaton Fuller

sometimes water gets into the cylinder for the range selector in the top cover. it corrodes in there and the piston cant move, so the air just leaks out. it could progress to the point that eventually you wont have low range anymore.

 

my dad lost the high side on his super ten once.. only had odd number gears and shifted like a five speed while loaded.. are was hissing out of the gear shift knob.. took it apart and found out that the rubber seal on the splitter had rolled (no lub) used the grease we use on the fifth wheel to lub it up and it worked fine for the rest of the fruit season. last weekend i was trying to get my gear shift knob threw a knew boot i bought and i didn't want to cut the boot or remove the air lines so i took the knob apart. ended up putting the hi/lo range selector switch on backwards and it started hissing as soon as the truck built up air pressure. shut the truck off took it back apart and flipped it over and it was good as new. let us know what the underlining cause is.. knowledge is power!!! share the wealth.

 

Check the range piston on the back of the trans.

 

FRO transmission range selector is located inside the transmission under the top cover.they're well known to leak.easy fix,low cost around 40.00 for rebuilt kit.also check the o-rings under the air module.

 

I sugest bad range valve.....

 

i just started hearing a hissing in my shifter, right at the handle

so it may be that i need to disassemble the handle and replace some bushings?

where do i get the new parts from?