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Drive train play...

Started by Vortech347, December 18, 2015, 04:49:04 PM

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Vortech347

Had a long day of showing homes today to clients and I noticed when going through neighborhoods when I would either barely get off the throttle or the car would go into a decel state I'd feel the slack in the drive train.  There isn't any audible clunks but its starting to drive me nuts.  Is this just a characteristic of the AWD systems on these cars?  My wife's escape doesn't do it and its AWD too. 
Matt H.
2013 SHO Performance Pack, Daily, AJPTurbo tuned
2003 SVT Cobra 497rwhp/491rwtq, Self tuned, Cruiser
1990 Mustang GT 570rwhp/530twtq, Self tuned, Open Track
2017 F150 XLT 5.0

markssho

Mine has made a slight clunk, in that scenario, for years now.

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2010 Taurus SHO, Cinnamon, 402B, ACC

ZSHO

#2
Think theres a solenoid that needs to be changed,if the clunk is between 1st and 2nd gear a dealer visit is in store,any codes set??  Z


2013 Performance Package SHO| Livernois Custom Methanol Tune|3-Bar Map|Reische-170-Stat|Full Race Tial-10psi BOV in Black|PPE-Gloss Black Hot Pipes|EPP Dual Intake in Gloss Black|PPE Catted DP|Corsa Sport Cat Back Exhaust|H&R Sport-Springs|CFM Performance Billet Valve Cover Breather In Gloss Black|Llumar 20%Ceramic window Tint|MSD Ignition Coils in Black|Extreme Roof Spoiler|Redline Fluids all around|Gearhead Intercooler|First-SHO With Direct Port Alky-VP-M1-100%-Methanol Injection|LMS-Custom-Dyno-Tuned @ 415whp-465wtq| Best Trap Speed of 115.54 mph|

Vortech347

It doesn't happen during a shift. It happens when in decel.
Matt H.
2013 SHO Performance Pack, Daily, AJPTurbo tuned
2003 SVT Cobra 497rwhp/491rwtq, Self tuned, Cruiser
1990 Mustang GT 570rwhp/530twtq, Self tuned, Open Track
2017 F150 XLT 5.0

FoMoCoSHO

According to my awd gauge there is no power transmitted to the front during decel, only the rear is active. Coming out of decel power goes to the rear first then splits power toward the front.

I wonder if that it what you are feeling....

curry67

Understanding the gearshift positions of the 6–speed automatic
transmission with transmission control switch (if equipped)
Your vehicle has been designed to improve fuel economy by reducing
fuel usage while coasting or decelerating. When you take your foot off
the accelerator pedal and the vehicle begins to slow down, the torque
converter clutch locks up and aggressively shuts off fuel flow to the
engine while decelerating. This fuel economy benefit may be perceived
as a light to medium braking sensation when removing your foot from
the accelerator pedal.

owners manual

AJP turbo

Quote from: FoMoCoSHO on December 20, 2015, 02:05:57 PM
According to my awd gauge there is no power transmitted to the front during decel, only the rear is active. Coming out of decel power goes to the rear first then splits power toward the front.

I wonder if that it what you are feeling....

Crazy...how can there be no power transmitted to the front?
SCT Dealer/Custom Calibrator                        
Specializing in 3.5 Ecoboost   
Remote/email custom tuning including E85 blends 
Authorized retailer for all SCT devices. 
 
Former:2014 PP SHO
3 bar 93 tune, Airaid, Stainless Works non catted DP's  
405whp/520tq
Dyno
     
Current:2016 F150 2.7 Ecoboost
Tuning in progress

CroR1

I can see this as from my experience, upon slowing down at stoplights and when turning, when  accelerating, the car seems like it's responding but not at the amount of input of gas pedal. It takes a bit for it to accelerate, seeming as there is a lag. But instead, it is probably applying power to rear first, which is almost non existent/noticeable for a moment until it hits the front wheels.

Quote from: FoMoCoSHO on December 20, 2015, 02:05:57 PM
According to my awd gauge there is no power transmitted to the front during decel, only the rear is active. Coming out of decel power goes to the rear first then splits power toward the front.

I wonder if that it what you are feeling....

Vortech347

Thanks for the info guys. Makes sense to what I'm feeling.  Glad I'm not nuts.

I feel so disconnected from the car.  Especially the drive by wire.   Hopefully it's something I get used to. I feel like the car makes all the choices, not me.  I'd give anything to switch the bias around for the AWD and a cable connected throttle body. To bad AWD can't be controlled in the tune. My old 98 5.0 explorer had a viscous system where it was always RWD and would shift power to the front.    Loved it.

Matt H.
2013 SHO Performance Pack, Daily, AJPTurbo tuned
2003 SVT Cobra 497rwhp/491rwtq, Self tuned, Cruiser
1990 Mustang GT 570rwhp/530twtq, Self tuned, Open Track
2017 F150 XLT 5.0

FoMoCoSHO

Quote from: ajpturbo on December 20, 2015, 10:50:37 PM
Quote from: FoMoCoSHO on December 20, 2015, 02:05:57 PM
According to my awd gauge there is no power transmitted to the front during decel, only the rear is active. Coming out of decel power goes to the rear first then splits power toward the front.

I wonder if that it what you are feeling....

Crazy...how can there be no power transmitted to the front?
That answer is most likely way above my pay grade, but that's what the gauge reports.