997.1 gt3 diff and gear box oil schedule
12-29-2016, 11:01 PM
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997.1 gt3 diff and gear box oil schedule
hi guys,
am I reading the schedule maintenance interval for the diff and gear box oil correctly when it says 96,000 miles or 12 years for a 997.1 gt3? Wow that sounds like a lot. Is that right? Is that what folks are doing in practice?
thanks
am I reading the schedule maintenance interval for the diff and gear box oil correctly when it says 96,000 miles or 12 years for a 997.1 gt3? Wow that sounds like a lot. Is that right? Is that what folks are doing in practice?
thanks
12-30-2016, 12:32 AM
#3
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Track time?
If not I'd do every couple years (every other oil change). Its not expensive and good pull the covers, inspect around, to look at the plug etc.
If with track time i'd do it at a min every other oil change (~10 track days)
If not I'd do every couple years (every other oil change). Its not expensive and good pull the covers, inspect around, to look at the plug etc.
If with track time i'd do it at a min every other oil change (~10 track days)
12-30-2016, 01:10 AM
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buying this car, id want the tranny fluid changed and check for filings.
The factory LSD packed out long ago, so you can live with it or replace it with a Guard unit depending on your budget and intended use.
The factory LSD packed out long ago, so you can live with it or replace it with a Guard unit depending on your budget and intended use.
12-30-2016, 07:08 AM
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very helpful, thank you! What other items would you do if you were new to the car that are outside of the regular scheduled maintenance? For example, i think power steering fluid is lifetime - would you change that?
12-30-2016, 10:09 AM
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The real service would be to replace the coolant lines and fittings. That is something i would have to do. They tend to fail given their age and the more track miles the more prone they are to failure.
12-30-2016, 01:22 PM
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Sorry for hijacking but speaking of trans oil changes.
Has anyone used Motul Gear 300 instead of Mobil Delvac?
I don't think the manual strictly calls for Delvac, just calls for a specific weight and rating.
I've used Motul Gear 300 in other application with great success and was just wondering if anyone has tried it in their GT3 trans.
Has anyone used Motul Gear 300 instead of Mobil Delvac?
I don't think the manual strictly calls for Delvac, just calls for a specific weight and rating.
I've used Motul Gear 300 in other application with great success and was just wondering if anyone has tried it in their GT3 trans.
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12-30-2016, 04:34 PM
#8
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I use MOTUL GEAR COMPETITION 75W140
Last 3-4 tranny changes.
I like its performance better than Delvac under cold conditions and it seems similar under hot.
We've tried this under advice of Bill Rader as an option vs. Delvac.
Seems good.
Last 3-4 tranny changes.
I like its performance better than Delvac under cold conditions and it seems similar under hot.
We've tried this under advice of Bill Rader as an option vs. Delvac.
Seems good.
12-30-2016, 09:54 PM
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Surprised that you went with 140 with no issues. I think it proves that the trans is not picky at all.
12-30-2016, 10:36 PM
#10
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Car sees mostly track use. Bill rader is one of a small number of specialists on these trannys.
09-20-2017, 05:16 PM
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Based on Spyerx's comments, I went with the Motul gear oil.
My 997.1 GT3 still had the factory fill in it (34,000 miles), rather change it than wait for the recommended service interval.
Wow, this stuff is amazing, noticed a difference in shifting immediately, blue color and totally worth it. I'm a convert !
My 997.1 GT3 still had the factory fill in it (34,000 miles), rather change it than wait for the recommended service interval.
Wow, this stuff is amazing, noticed a difference in shifting immediately, blue color and totally worth it. I'm a convert !
09-20-2017, 06:46 PM
#14
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For myself and all TPC customers for track use is every 10-12 track days.
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PCA National Instructor
TPC Racing stats:
2023 Porsche Sprint Challenge 992 Cup Am Champion
2023 Porsche Sprint Challenge GT4 Pro-Am Team Champion
2022 Porsche Sprint Challenge 992 Cup & 991 Cup Champion
2020 IMSA GT3 Cup Challenge 2nd Championship
2018 IMSA GT3 Cup Challenge 2nd Championship
2016 IMSA GT3 Cup Challenge Champion
2013 IMSA GT3 Cup Challenge Champion
2006 Rolex-24 @ Daytona GT Champion
2004 Grand-Am SGS Class Champion
09-20-2017, 07:13 PM
#15
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^^^ Same. I do transmission every other oil change. I change oil every ~5 track days. Trans ~10 days.
Ive been very pleased with the Motul. Delvac was fine too, but I feel cold shift is much better on the Motul.
Ive been very pleased with the Motul. Delvac was fine too, but I feel cold shift is much better on the Motul.