AWD not working?

LSOR · August 25, 2018, 02:33:39 PM

I have a 2014 Flex and was at the track last night. My last 2 runs it seemed like my rear tires didn't have power and I was smoking the front tires. What should I look at?

https://youtu.be/F8zLt-HJwv4

irondoor19 · August 25, 2018, 02:55:49 PM

You Were smoking for Sure,
Tire Pressure in the Front?
Were they Spraying the surface?
and what was your ET in the 1/8?

SHOdded · August 25, 2018, 05:06:09 PM

AWD system if the above suggestions do not pan out.

LSOR · August 25, 2018, 05:54:23 PM

I hit 79 mph in the 1/8 at 8.83. Street tire pressure. They sprayed the burnout box with water.

Vortech347 · August 25, 2018, 11:08:29 PM

Never drive through a burn out box with street tires.

That much wheel spin is pretty bad. Does it do that on the street?

LSOR · August 26, 2018, 08:28:43 AM

It hasn't yet, but how do you not drive through the burnout box? It's right before the lane.

LSOR · August 26, 2018, 08:33:41 AM

I looked through my slips, I ran 12 times, tires only did this the last 2 runs.

Brucelinc · August 26, 2018, 09:57:19 AM

The system can overheat and cut or eliminate torque at the RDU. Once it cools, it would be fine again. That is a possibility if you ran 12 times and only the last two had this condition.

I run a two different tracks and the staging lanes are plenty wide enough to avoid the burnout box. I am surprised that other tracks might not be wide enough.

LSOR · August 26, 2018, 10:38:54 AM

Thanks, I'm going to assume that it probably just got hot then. I'll change fluids this week to be safe.

This is a really small track (Eddyville Iowa) the burnout area is literary right before the staging area, not wide enough to go around

StealBlueSho · August 26, 2018, 02:37:02 PM

We have a backwoods 1/8 mile track... they used to spray water so you couldn't go around it, but once the AWD guys complained they moved the water box back... so we can go around it...

I have seen guys run grudge matches where the crew "accidentally" sprays to close so the AWD guys get screwed... oh well...

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Brucelinc · August 26, 2018, 03:15:07 PM

Quote from: LSOR on August 26, 2018, 10:38:54 AM
Thanks, I'm going to assume that it probably just got hot then. I'll change fluids this week to be safe.

This is a really small track (Eddyville Iowa) the burnout area is literary right before the staging area, not wide enough to go around

Eddyville, Iowa.....been there a few times but never ran there. That is about as remote of a location as Rock Falls, Wisconsin. Lol

Gray Brick · August 26, 2018, 06:42:08 PM

I used to have issues with the PTU heating up and the AWD turning off.
Changing the PTU oil on a regular basis made it completely go away.
I am still amazed they call it "lifetime" fluid.

LSOR · August 26, 2018, 09:37:33 PM

What oil do you use? I have Royal Purple in mine currently.

Gray Brick · August 26, 2018, 09:41:30 PM

Motorcraft factory stuff

irondoor19 · August 27, 2018, 10:00:06 AM

Quote from: LSOR on August 25, 2018, 05:54:23 PM
I hit 79 mph in the 1/8 at 8.83. Street tire pressure. They sprayed the burnout box with water.

OK For reference: 1/8 Mile Using Spray VHT at the Line (sticky Stuff)
25 PSI Front, 28 PSI Rear, and driving around the water Box...

8.5 @ 80 MPH in my Stock 2013 PI, w drop in Air Filter Only
8.0 @ 85 MPH in my 2011 SHO with a ton of Go fast Stuff..

AND your ARE in a Brick, SO you are Fine