I dont know much about newer ford trannys as my other auto cars always had th350's...Im just curous because sometimes my aode acts like it shift to 4th early and feels like the engine is missing..if I give it gas it downs shifts and is fine...It only does this sometimes..I havent change the tranny fluid and filter since I bought it 6 months ago as I dont have time (single parent whose kid has deadbeat mom)...I do plan on changin the filter and fluid soon but I also noticed a vaccum hose that goes from teh back of the intake manifold along the firewall and down to teh wheel well...what does this vacuum hose do? Does it go to teh tranny . Its kinda dry rotted looking. Any help appriciated
Aode...does it have a vaccum modulator?
- Thread starter Juggalo95
- Start date
BlackVert
15 Year Member
i'm 99% sure our AOD-E trannys do not have a vacuum modulator
if i understand it the vacuum modulator is for controlling how hard an AOD shifts. this is now controlled by the computer by varying the line pressure by "fluttering" the EPC (electronic pressure control) solenoid. it essentially opens and closes the EPC very fast in order to modulate the line pressure
you are probably talking about the canister purge hose, or maybe one of the other emissions control hoses. the CP hose does tend to dry rot because it vents gas fumes from the trunk into the intake
if i understand it the vacuum modulator is for controlling how hard an AOD shifts. this is now controlled by the computer by varying the line pressure by "fluttering" the EPC (electronic pressure control) solenoid. it essentially opens and closes the EPC very fast in order to modulate the line pressure
you are probably talking about the canister purge hose, or maybe one of the other emissions control hoses. the CP hose does tend to dry rot because it vents gas fumes from the trunk into the intake
Chris is right - vac mod's are for non-E-trannies (ditto for TV cables).
Our crap is all electronic. These trannies tend to want to row through the gears early. And they can need a nudge to get out of 4th (mine likes to lug at 1200 RPM in OD).
And I think Chris is right on - it sounds like you're talkin about the purge line. They rot. If you remove the inner wheel liner on the passenger side, you can access the canister itself (it's right under the antenna).
Good luck.
Our crap is all electronic. These trannies tend to want to row through the gears early. And they can need a nudge to get out of 4th (mine likes to lug at 1200 RPM in OD).
And I think Chris is right on - it sounds like you're talkin about the purge line. They rot. If you remove the inner wheel liner on the passenger side, you can access the canister itself (it's right under the antenna).
Good luck.
They are all electronic. I found out the expensive way back in 2000, when I had problems with mine. 1500 dollars later, I had a rebuilt trans that still had problems. After two more trips back to the trans shop it was right. They put in a stock sprag, that is weak and kept going bad. They replaced it with a heavy duty peice....result.....really firm shifts, and no more problems.
