please tell me the AC delco part number for the trans fluid for 6speed 1le!

birdmanf16 · 10-04-2018, 05:02 PM

There seems to be confusion over the correct transmission fluid for our 6 speed tremec car. I called the dealership, and he told me 2 different possible part numbers. I looked at royal purple, they show that it could be the syncromax ATF fluid that conforms to warranty, or it can take another fluid that is specific for a manual transmission. It says that the latter fluid is for "performance upgrade". So, please tell me....what is the AC delco part number for our transmission fluid? And what royal purple fluid should I put in the car? I don't care about the warranty.

LADYBUG5 · 10-05-2018, 01:08 AM

Hope this helps you!

Mountain · 10-05-2018, 02:09 PM

Anything that is or is like Dex III. I use RedLine D4.

AZ_1LE · 10-05-2018, 02:16 PM

Amsoil all the way - https://www.amsoil.com/shop/by-produ...mission-fluid/

Stocktastic · 10-05-2018, 03:50 PM

Quote:

Originally Posted by AZ_1LE

Amsoil all the way - https://www.amsoil.com/shop/by-produ...mission-fluid/

While it may be great lubricant, it's only recommended for use in vehicles requiring DEXRON III... It makes no mention of meeting or exceeding the spec. All it says it's Amsoil-engineered for use in those vehicles.

OP, the stock fluid is great stuff, just keep it changed as the maintenance schedule states.

DorkMissile · 10-05-2018, 04:12 PM

The reason you want to avoid a DexIV fluid is because GM required DexIV to have detergents in it to help prevent glazing on clutch packs. Great in a auto trans, HOWEVER, most Tremec transmissions use plastic / composite pads on the shift forks. This design is a good one, however the detergents can make the plastic swell, which will cause them to wear fast.

Hence the recommendation by GM to use DexIII. This is a non-synthetic ATF, however it does not have the detergent. Its the best fluid GM has for it.

I was referred to use Syncromax by a friend of mine who works at GM at the Prooving Grounds in Millford. It is a full synthetic lube (its almost like water), however it does not have the detergents that a DexIV approved fluid.

This is what I used - it shifts substantially better IMO

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

birdmanf16 · 10-05-2018, 09:38 PM

I went with 88861800....thanks for the help!

AZ_1LE · 10-07-2018, 01:50 PM

Quote:

Originally Posted by Stocktastic

While it may be great lubricant, it's only recommended for use in vehicles requiring DEXRON III... It makes no mention of meeting or exceeding the spec. All it says it's Amsoil-engineered for use in those vehicles.

OP, the stock fluid is great stuff, just keep it changed as the maintenance schedule states.

The OEM part number for transmission fluid is 88861800 which is a Dexron III fluid (GM renamed it "Manual Transmission Fluid"). Plus, Tremec specifies Dexron III to be used in our TR6060, and it has for years. The Amsoil Signature Series ATF does indeed exceed even the Dexron VI specification and is backwards compatible with transmissions requiring Dexron III. Link - https://www.amsoil.com/lit/databulletins/g3110.pdf

The stock fluid is junk, honestly. After swapping to Amsoil, the difference in shifting was immediate and I am very happy I did it. Trans temps stay well below "hot" at track events, as well.

Deakins · 10-09-2018, 09:58 AM

I also agree that the stock fluid is terrible, when the temps drop the shift effort while cold is very heavy and notchy. I changed to the RP ATF and it improved performance all around but after a season of track days I changed to Amsoil Torque Drive. It's a synthetic fluid designed to operate in place of the Dex 3H fluid spec and not the Dex IV spec. Just my .02

10-04-2018, 05:02 PM	#1
birdmanf16 Drives: 2022 Zl1 1lE Join Date: May 2018 Location: Mission Viejo, CA Posts: 220	please tell me the AC delco part number for the trans fluid for 6speed 1le! There seems to be confusion over the correct transmission fluid for our 6 speed tremec car. I called the dealership, and he told me 2 different possible part numbers. I looked at royal purple, they show that it could be the syncromax ATF fluid that conforms to warranty, or it can take another fluid that is specific for a manual transmission. It says that the latter fluid is for "performance upgrade". So, please tell me....what is the AC delco part number for our transmission fluid? And what royal purple fluid should I put in the car? I don't care about the warranty. __________________ 2022 Camaro Zl1 1LE, e85, Roto Fab and tune 2020 Colorado ZR2 Dusk edition 2021 Mustang Mach e

10-05-2018, 01:08 AM	#2
LADYBUG5 Drives: ‘18 1SS 1LE Join Date: Jan 2015 Location: Ventura County Posts: 25	Hope this helps you! Attached Images

10-05-2018, 02:16 PM	#4
AZ_1LE Drives: 2019 ZL1 1LE Join Date: Feb 2017 Location: Gilbert, AZ Posts: 648	Amsoil all the way - https://www.amsoil.com/shop/by-produ...mission-fluid/ __________________ Old: 2017 SS 1LE Old: 2017 ZL1 Current: 2019 ZL1 1LE

10-05-2018, 09:38 PM	#7
birdmanf16 Drives: 2022 Zl1 1lE Join Date: May 2018 Location: Mission Viejo, CA Posts: 220	I went with 88861800....thanks for the help! __________________ 2022 Camaro Zl1 1LE, e85, Roto Fab and tune 2020 Colorado ZR2 Dusk edition 2021 Mustang Mach e

10-05-2018, 02:09 PM	#3
Mountain Drives: 2017 SS 1LE, 2016 1SS (previous) Join Date: Apr 2016 Location: Metro-Detroit Posts: 1,863	Anything that is or is like Dex III. I use RedLine D4.

10-05-2018, 04:12 PM	#6
DorkMissile Drives: 18 1SS 1LE HyperBlue Join Date: Aug 2018 Location: Twin Cities, MN Posts: 612	The reason you want to avoid a DexIV fluid is because GM required DexIV to have detergents in it to help prevent glazing on clutch packs. Great in a auto trans, HOWEVER, most Tremec transmissions use plastic / composite pads on the shift forks. This design is a good one, however the detergents can make the plastic swell, which will cause them to wear fast. Hence the recommendation by GM to use DexIII. This is a non-synthetic ATF, however it does not have the detergent. Its the best fluid GM has for it. I was referred to use Syncromax by a friend of mine who works at GM at the Prooving Grounds in Millford. It is a full synthetic lube (its almost like water), however it does not have the detergents that a DexIV approved fluid. This is what I used - it shifts substantially better IMO https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

10-09-2018, 09:58 AM	#9
Deakins Drives: 2017 2ss, m6 Join Date: Jan 2017 Location: Iowa Posts: 231	I also agree that the stock fluid is terrible, when the temps drop the shift effort while cold is very heavy and notchy. I changed to the RP ATF and it improved performance all around but after a season of track days I changed to Amsoil Torque Drive. It's a synthetic fluid designed to operate in place of the Dex 3H fluid spec and not the Dex IV spec. Just my .02

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