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Re: Re: Re: '53 6400 series two speed firewall mou

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Posted by randy in il on August 20, 2003 at 08:02:11 from (4.33.41.90):

In Reply to: Re: Re: '53 6400 series two speed firewall mounted posted by Randy in IL on August 19, 2003 at 08:22:32:

ok, i did soem close inpecting on this truck and well it has the following:

two hoses back to rear axle, double vacuum diapragm, no spring, so is different design and setup than the apparently more commmon single hose and single spring diapragms,

there is a control unit of some kind mounted inside the frame rail on driver side under front of cab next ot master cylinder under cab floor, a rod runs down to it verticalyl from the unit mounted on firewall above inline with the frame rail mounted unit.

three hoses run to the frame rail unit, and three also from the firewall mounted unit, one of those hoses on the firewall unit being vacuumn from intake manifold, unit on firewall has a line running out the passenger most side and another out the bottom, both go to the frame rail unit, a third hose on the frame rail unit runs to a vacuum canister mounted inside the cab on pass side in the rear corner inside, everything is 1/2" hosing and tubing.

i have vacuum at switch on dash and at rear axle and axle will click when flip from or to hi or lo, but engine RPM and vehicle speed is always the same.

would axle gear oil level affect how this system works or doesnt work ?

howcome there is some kind of oil in the bototm exiting line of the firewall unit ? its very wet, and is capped off where it comes out of the bottom of the unit, i reconnected them and the engine runs bad at idle with it reconnected so i capped the line back off again, engine RPm and vehicle speed did not change with line reconnected and the vacuum canister is not connected


who and where would know anything about the 50s HD 2 speed eaton axle systems like this?
i may keep the truck intact if i can get the axle into hi soemhow, i tried swapping hoses at the axle diapragm and it didnt change anything either, so hmm... maybe diapragm is busted and thats why line at the firewall unit had oil in it ? sucking oil through bad diapragm ?

hmm..

thanks for anything

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