The owners manual says Manual Transmission Lubricant 21018899 which has been discontinued.
The repair manual says Dexron III.
Any reason I can't use Dexron VI?
The repair manual says Dexron III.
Any reason I can't use Dexron VI?
Saturn Ion Getrag F23 5-speed manual, what fluid?
- Thread starter atikovi
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I'm not sure this applies to your model or not, but the old S-series called for Dexron III in the manual trans. When Dexron VI came out, GM said it should not be used in the Saturn manuals. That's when they started recommending a manual trans fluid. I somehow got the idea that it was re-labeled Dex III, but that might not be correct. At any rate, GM's guidance back then said Dex VI was not suitable in the manuals that took Dex III.
I've used Mercon V in manuals that took Dex III with good results.
This website says it is still for sale around $9.86 per qt
75W-90 Manual Transmission and Transfer Case Fluid - 1 qt 88861800 GM | GMPartsDirect.com
88861800 - 75W-90 Manual Transmission and Transfer Case Fluid - 1 qt
www.gmpartsdirect.com
That website just searches the internet and spits out raw information without vetting it. I've called dealers saying a part number should still be available, and they have asked me if I got that info from oemcats, so it has fooled a lot of people. Looking at a real GM dealer site shows its discontinued.This website says it is still for sale around $9.86 per qt
Lubricant, M/Transmission 946 Ml 21018899 | Malouf Parts Xperts
21018899 - Lubricant, M/Transmission 946 Ml
www.maloufpartsxperts.com
That looks like gear oil. I thought it takes a much thinner automatic transmission fluid. Redline is saying their D4 would work at three times the price of Dexron VI.75W-90 Manual Transmission and Transfer Case Fluid - 1 qt 88861800 GM | GMPartsDirect.com
88861800 - 75W-90 Manual Transmission and Transfer Case Fluid - 1 qt
It's the same viscosity as Dexron III
EDIT: It's also the same viscosity as Redline D4.
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When I pour Dexron out of the bottle it's thin and runny while 75W90 I have to squeeze the bottle sometimes to get it out. How can they be the same viscosity?
surely you can get a bottle of supertech dextron fluid and it will meet the specification. I'd take a look at the bottle I bet it meets II and III
Discontinued.
88865544 - Genuine GM Parts
GMPartsGiant.com offers the great deal for genuine GM parts, 88865544. FLUID,A/TRANS TYPE III (H) ACDELCO 1QTX12 TL. All parts are backed by the GM's warranty.
www.gmpartsgiant.com
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I don't think 109240 is. 88865544 might be. RockAuto will let me order it now.Discontinued.
88865544 - Genuine GM Parts
GMPartsGiant.com offers the great deal for genuine GM parts, 88865544. FLUID,A/TRANS TYPE III (H) ACDELCO 1QTX12 TL. All parts are backed by the GM's warranty.
Amazon has it: https://www.amazon.com/ACDelco-10-9240-Professional-Automatic-Transmission/dp/B01EGOR40Y
I think the 88865544 was a GM number when it was still DEX licensed.
You can use the not-Dexron III mentioned above, but you might be better off with Pennzoil or Valvoline Synchromesh, GM Synchromesh, or Royal Purple Synchromax 
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TES-295
Same viscosity as Dexron III, but full synthetic as Dexron VI…
www.allisontransmission.com
Same viscosity as Dexron III, but full synthetic as Dexron VI…
On-Highway Fluids
Allison Transmission approved fluids are tested to meet our stringent requirements, which ensure maximum transmission durability with minimal downtime.
www.allisontransmission.com
OK so Redline D4 or Royal Purple Synchromax seems the way to go?
If that's your preference, go for it. I thought the GM stuff would have been easier for you to get, that's all.
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Rock Auto
MOBIL 122062 Transmission Fluid | RockAuto
RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Easy to use parts catalog.
www.rockauto.com
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