Maintenance Intervals

[NoXiDe]

GT350 Recommended Maintenance
Based on the data through the below documentation:
2015-2016 Supplement Guide
http://www.fordservicecontent.com/F...350-Supplement-version-1_su_EN-US_07_2015.pdf
2017 Supplement Guide
http://www.fordservicecontent.com/F...350-Supplement-version-1_su_EN-US_04_2016.pdf
2019 Supplement Guide
http://www.fordservicecontent.com/F...350-Supplement-version-1_sg_EN-US_12_2018.pdf

Interval - Operations
15,000
- Inspect engine air filter. Replace as required.
30,000
- Inspect engine air filter. Replace as required.
- Replace fuel filter
45,000
- Inspect engine air filter. Replace as required.
60,000
- Inspect engine air filter. Replace as required.
- Replace fuel filter
- Replace spark plugs
75,000
- Inspect engine air filter. Replace as required.
90,000
- Inspect engine air filter. Replace as required.
- Replace fuel filter
105,000
- Inspect engine air filter. Replace as required.
120,000
- Inspect accessory drive belt(s)
- Inspect engine air filter. Replace as required.
- Replace fuel filter
- Replace spark plugs
135,000
- Inspect engine air filter
140,000
- Inspect accessory drive belt(s)
150,000
- Inspect engine air filter. Replace as required.
- Change orange coolant
- Replace fuel filter
- Change manual fluid transmission fluid
- Replace accessory drive belts (if not replaced within last 100,000 miles)

Above is directly from FORD Service Dept per VIN.

NOTE: Mustang literature does state to replace oil, tran, and differential after a track event session where the vehicle was ran longer than 15 minutes. It's to your own discretion as it applies to the Mustang and not directly to the GT350. GT350 Supplement doesn't appear to state this information.

Component Replacement Parts
OEM Front Brake Pads
1 - FR3Z-2001-L https://parts.autonationfordwhitebearlake.com/oem-parts/ford-brake-pads-fr3z2001l
OEM Front Rotors
1 - FR3Z-1125-F (left) https://parts.autonationfordwhitebearlake.com/oem-parts/ford-rotor-fr3z1125f
1 - FR3Z-1125-E (right) https://parts.autonationfordwhitebearlake.com/oem-parts/ford-rotor-fr3z1125e

OEM Rear Brake Pads
1 - FR3Z-2200-E https://parts.autonationfordwhitebearlake.com/oem-parts/ford-brake-pads-fr3z2200e
OEM Rear Rotors
2 - FR3Z-2C026-C (both sides) https://parts.autonationfordwhitebearlake.com/oem-parts/ford-rotor-fr3z2c026c

Syn DOT 4 Brake Fluid 750ml capacity - Liter of Motul RBF 660 ($22.99) x2
Brake Flush Hint

All models = Transmission Fluid: 2.5 quarts (2.4L):
To order: Motorcraft Mercon LV Automatic Transmission Fluid | https://www.rockauto.com/en/parts/motorcraft,XT10QLVC,transmission+fluid,11387 QTY 3

2016 Tech Pack / No Differential Cooler requires: 53.97 oz total of Rear axle fluid (1.5L) & Rear axle friction modifier (3.25 fl oz)
To order: Motorcraft SAE 75W85 Premium Synthetic Hypoid Gear Lubricant (Rear Axle fluid) https://www.rockauto.com/en/parts/motorcraft,XY75W85QL,gear+oil,11394 QTY 2
To order: Motorcraft Addictive Friction Modifier | https://www.rockauto.com/en/partsearch/?partnum=XL3 QTY 1

2016 Track - 2019
With Differential Cooler requires: 68.4966 oz total of Rear axle fluid (1.9L) & Rear axle friction modifier (4.23 fl oz)
To order: Motorcraft SAE 75W85 Premium Synthetic Hypoid Gear Lubricant (Rear Axle fluid) https://www.rockauto.com/en/parts/motorcraft,XY75W85QL,gear+oil,11394 QTY 2
To order: Motorcraft Addictive Friction Modifier | https://www.rockauto.com/en/partsearch/?partnum=XL3 QTY 2

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[jmn444]

150k miles. doesn't state anything different for track use though, and I'm not comfy with that if used on track regularly....

 

[NoXiDe]

150k miles. doesn't state anything different for track use though, and I'm not comfy with that if used on track regularly....

On another forum, regarding the same question the end user posted that he found some inforumation on page 13 of the Mustang User Guide. Not the GT350 supplement guide which is what I was referring to earlier in post 1. According to this document, it states after each road course you should change your transmission oil after each event where you vehicle is subjected to individual on-track sessions exceeding 15 minutes. It states to change your oil and filter after each event. The question is this applies to the Mustang and I've found no literature for the GT350 which could fall under the mustang category...

Here's my main issue: I turned on the Gt350 tech tran oil temp in the winter and finally ran it through the mountains during a run and had it reach 250 degrees Fahrenheit. I'm concerned that since it reached this hot that it should be changed immediately. Regardless, this thread will hopefully server everyone well if we can get some definite interval changes.

 

[JAJ]

150k miles. doesn't state anything different for track use though, and I'm not comfy with that if used on track regularly....

It's this - ^^^ - or it's after every 10 hours of track time. I change my trans and diff fluids once a year in the fall. You can cycle the diff pump (in a car that came with one) with Forscan.

 

[NoXiDe]

How hot are the temps tho? I can see if they stay below 220...

 

[JAJ]

How hot are the temps tho? I can see if they stay below 220...

IIRC, the tech pack cars would go into limp mode if the transmissions got too hot - so if it didn't go into limp mode then it was within operational limits and no extraordinary steps need to be taken. Or am I mistaken about the limp mode thing?

 

[jmn444]

On another forum, regarding the same question the end user posted that he found some inforumation on page 13 of the Mustang User Guide. Not the GT350 supplement guide which is what I was referring to earlier in post 1. According to this document, it states after each road course you should change your transmission oil after each event where you vehicle is subjected to individual on-track sessions exceeding 15 minutes. It states to change your oil and filter after each event. The question is this applies to the Mustang and I've found no literature for the GT350 which could fall under the mustang category...

Here's my main issue: I turned on the Gt350 tech tran oil temp in the winter and finally ran it through the mountains during a run and had it reach 250 degrees Fahrenheit. I'm concerned that since it reached this hot that it should be changed immediately. Regardless, this thread will hopefully server everyone well if we can get some definite interval changes.

The other problem with that general guide is that to me it doesn't seem logical that the auto and manual trans would have the same fluid interval requirements.... but yeah that guidance is in there.

Also, the supplement states oil change should be expected @ 3000-5000 miles under severe/extreme use and specifically lists "Maximum load or track use" as one of those conditions. That's contrary to what the normal manual wants saying to change oil every event, so I think it's reasonable to assume the normal manual recommendations aren't for the gt350. The oil used in a normal GT isn't as robust (or as pricey hahaha) as well....

They should have done a better job on these types of specifications though... I DO think the 12 hour of track time for a diff fluid change isn't unreasonable and could be a reasonable trans fluid change spec as well. nothing lasts forever and 150k miles seems insane to me if used on track. Just my opinion though!

 

[NoXiDe]

Original post has been updated with the information that I've found. Spoke with the service department and they were kind enough to email me the details using my VIN number. Please feel free to add anything else that you may like to add. May be worth sticking.

 

[jmn444]

def not worth a sticky lol... all in the manual... odd they didnt tell you to change the diff fluid at 150k too though.

Would be nice to see a definitive ford recommendation/warrantyrequirement for intervals for track use though. I don't like vague info!

 

[NoXiDe]

My transmission oil was at 252 degrees which is why I started this journey. I was wondering if that would be a great reason to change the fluids. My buddy's z06 c7 was at 140 degrees and thought it was wild that I was at 252 (with no tran cooler) as we both ran both cars for the same duration. I was hoping for a company like ford that sells track focused vehicles that they had a track recommendation interval list of items.

 

[jmn444]

i dont recall my trans being that high ever... seems like diff and oil have been comparable at times, but trans alway 50 to 75 degrees cooler... but that's also likely a track dependent variable as well. could be wrontg though as i don't focus on that as much as I should maybe.

Agree that they should have a spec'd interval...

 

[key01]

252 degree trans oil sounds way high to me

 

[mkonrad]

IIRC, the tech pack cars would go into limp mode if the transmissions got too hot - so if it didn't go into limp mode then it was within operational limits and no extraordinary steps need to be taken. Or am I mistaken about the limp mode thing?

Not mistaken. I had to temporarily swap my old, stock tech pack transmission without coolers in in temporarily, and it would overheat within 3 laps at COTA, in the hot summer. I'm not sure I would actually call it "limp" because it was a warning "drive careful, cool down" and puts you well down on power, at ~280 degrees. I had the privilege of true limp home mode, and that's not just a warning so I had to clear codes to fix it - but in this case was not due to transmission.

My track based service intervals are engine oil after one or two events, diff fluid and transmission twice a year.

 

[NoXiDe]

10 miles so roughly 7 minutes (honeybadger knocks it out at 2:33 min a lap) it overheats? @mkonrad did you purchase the track transmission eventually or did you add coolers, line, and internal dash switch to your tech pack?

 

[JAJ]

252 degree trans oil sounds way high to me

252 Degrees does sound high, but it's not, according to Ford. I happen to have a copy of a Ford OEM spec for ATF, but they don't say which one by product name, only by engineering requirements. It looks like Mercon V. Anyway, 100 hours at 315 degrees F is the "oxidation test" spec, and to pass, it has to not oxidize. The lowest temperature for performance tests is 250F and the highest is just under 300F. The testing regime implies that ATF is just getting going at 250 and is expected to operate for a long time at sustained temperatures up to 300.

With this kind of rigour at those kinds of temperatures, it's probably fine to go with "if you don't get an overheat indicator, it's ok".

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