2018 GT PP2 Rear Differential Overheating Issue

[aleccolin]

They obviously positioned it down low where there will always be an oil bath, but the sensor definitely doesn't need to be a wet probe to be accurate, so the blind hole makes sense.

Regarding the diff cover though, the S197 wasn't IRS, so the whole diff housing is different.

Sponsored

 

[Norm Peterson]

Regarding the diff cover though, the S197 wasn't IRS, so the whole diff housing is different.

Not sure why that would prevent designing an IRS diff cover with fins. There may not be as much airflow around the back of an IRS diff, so it might not be as effective as a finned stick-axle cover. But you'd think that any more heat rejection than is currently the case would have to be better.


Norm

 

[aleccolin]

Not sure why that would prevent designing an IRS diff cover with fins.

It wouldn't, I interpreted "if only they had carried it forward" as meaning they should have used that cover on the 15+ cars, not that they should have designed a new one for the IRS housing with fins. My bad

The problem with finned covers is even those don't really work all that well without lots of air going across them. Gale Banks recently went through a thorough design process on diff covers and wound up using a "scoop" to force air across the integral cooling fins. Pretty neat solution, but the air under a car designed for good aero (without using a full undertray and diffuser) is going to be a lot more stale than the air under a big ass truck though, so that may have something to do with not using passive cooling fins.

 

[Norm Peterson]

You still have to design the pumpkin, and with it having to be bolted up to the cradle directly (as opposed to via stick-axle suspension linkages) it is necessarily going to look a bit different. IOW, what the big casting needs should drive the cover design rather than the other way around.

I get that you'd probably need to do some ducting to get truly useful amounts of airflow. Perhaps some simple sheet metal deflectors kind of on the idea of what's starting to show up for front brake cooling, and maybe a vertical orientation of the fins wouldn't be the best choice.


Norm

 

[r00tbeer]

I found out that Forscan will read the PP diff sensor temp via the PCM. Woohoo!

 

[shogun32]

I found out that Forscan will read the PP diff sensor temp via the PCM. Woohoo!

Now we just need a small phone app that will do the same thing.

 

[r00tbeer]

I used Forscan Lite on Android to read it.

 

[hlh1]

My Dash has a read out:

 

[r00tbeer]

2015-17 do not have the gauge. We need Forscan to read the temps.

 

[hlh1]

2015-17 do not have the gauge. We need Forscan to read the temps.

Sorry to hear that.

 

[aleccolin]

I found out that Forscan will read the PP diff sensor temp via the PCM. Woohoo!

That’s awesome, I guess I’ll pick up an OBD Dongle and try it out! What are you using?

 

[r00tbeer]

OBDLink MX

 

[aleccolin]

OBDLink MX

Ballin', thanks!

 

[LS_Coyote]

Anyone make a finned differential cover yet?

I would also love to know this. I am having axle temp problems on the track but the dedicated GT350 cooler is just too expensive and complex for me. Does anyone have an update if there is a finned diff cover for these cars yet?

 

[mustang5o]

I would also love to know this. I am having axle temp problems on the track but the dedicated GT350 cooler is just too expensive and complex for me. Does anyone have an update if there is a finned diff cover for these cars yet?

Have you tried fluid change and exhaust wrap yet? I've only had one warning with this but no limp mode (so far).

Sponsored