Transmission Fluid & Filter

[mcr217]

I have a '18 Silverado 1500 z71 8 speed transmission. I cant seem to find the part number for the trans fluid filter. I see one on Amazon that says it fits but in the description it says "for 6 speed trans." Does this make a difference? I also noticed AC Delco makes a synthetic trans fluid (Dexron v1). Any thoughts on if this is better for a truck with 90k than just reg dexron?

[SARNCAN]

I have a '18 Silverado 1500 z71 8 speed transmission. I cant seem to find the part number for the trans fluid filter. I see one on Amazon that says it fits but in the description it says "for 6 speed trans." Does this make a difference? I also noticed AC Delco makes a synthetic trans fluid (Dexron v1). Any thoughts on if this is better for a truck with 90k than just reg dexron?

 

I assume 1500 Denali and HighCountry are the only ones with 8-speed transmission.

[Z45]

Vehicle: 2018 Chevrolet Silverado 1500 5.3L V8 FLEX VIN:C

 

AC Delco Auto Trans Filter Kit
Part Number:  TF922
Product Notes: 

Auto Trans Filter Kit
All; FILTER REPLACEMENT NOT Reqd WHEN FOLLOWING TSB"S: TSB 16-NA-175 OR 18-NA-177; VIN: C, Auto Trans, Eng Code: L83, 8L90, 8 Speed Trans, Transmission*; VIN: R, Auto Trans, Eng Code: L8B, 8L90, 8 Speed Trans, Transmission*

 

Per Vehicle: 1; Years: 2017-2018

 

Auto Trans Filter Kit
Part Number:  TF922
Product Notes: 

Auto Trans Filter Kit
All; FILTER REPLACEMENT NOT Reqd WHEN FOLLOWING TSB"S: TSB 16-NA-175 OR 18-NA-177; VIN: C, Auto Trans, Eng Code: L83, 8L90, 8 Speed Trans, Transmission*; VIN: R, Auto Trans, Eng Code: L8B, 8L90, 8 Speed Trans, Transmission*

 

Per Vehicle: 1; Years: 2016-2018

 

Be careful buying GM parts from other sources as they may not be correct parts.  Go to a local dealer with your vin to get the correct part. 

Edited November 20, 2020 by elcamino

[LDM]

TF922 is the part number you need for the 8 speed transmission.  Amazon has it here:

 

https://www.amazon.com/ACDelco-TF922-Professional-Automatic-Transmission/dp/B010GPPRQ0/ref=sr_1_1?dchild=1&keywords=TF922&qid=1605879158&sr=8-1

 

Unfortunately Amazon's parts checker leaves a lot to be desired.  If you put in a 2018 Chevy Silverado 1500, it tells you this part won't fit your truck even though it does.  I've seen that with a lot of parts on Amazon, so always verify that the part you need is correct.  Rock Auto has always been a good cross reference for parts or you can always use Advance Auto, Autozone, Oreilly, or NAPA.

 

No need to waste money buying parts from a dealer if you know how to verify the part numbers unless you really enjoy paying the excessive dealer markup.

[Black02Silverado]

The fluid it takes is dexron HP  not dexron VI.  Using a full synthetic is best for any transmission considering the abuse they take and not getting serviced like they should.  You can use AMSOIL's ATL fluid.  If interested send me a PM with your address and I can get you a quote.

[newdude]

11 hours ago, mcr217 said:

I have a '18 Silverado 1500 z71 8 speed transmission. I cant seem to find the part number for the trans fluid filter. I see one on Amazon that says it fits but in the description it says "for 6 speed trans." Does this make a difference? I also noticed AC Delco makes a synthetic trans fluid (Dexron v1). Any thoughts on if this is better for a truck with 90k than just reg dexron?

 

DO NOT use Dexron VI. 

 

8 Speeds use Mobil 1 LV HP ATF Synthetic with the BLUE LABEL.  

 

You will also need to follow the specific fill and level check procedures for the 8 speed as well as it has no dipstick/dipstick tube.  

Edited November 20, 2020 by newdude

[mcr217]

On 11/20/2020 at 9:23 AM, newdude said:

 

DO NOT use Dexron VI. 

 

8 Speeds use Mobil 1 LV HP ATF Synthetic with the BLUE LABEL.  

 

You will also need to follow the specific fill and level check procedures for the 8 speed as well as it has no dipstick/dipstick tube.  

I had a feeling the dextron VI wouldnt work. Thanks for the headsup 

[mcr217]

On 11/20/2020 at 8:57 AM, Black02Silverado said:

The fluid it takes is dexron HP  not dexron VI.  Using a full synthetic is best for any transmission considering the abuse they take and not getting serviced like they should.  You can use AMSOIL's ATL fluid.  If interested send me a PM with your address and I can get you a quote.

I cant find Dextron HP. It says it is a discontinued product. Trash Amazon tells me VI is compatible with my truck and other stuff isnt that actually is. I should've known better lol. 

 

[mcr217]

On 11/20/2020 at 1:35 AM, SARNCAN said:

 

I assume 1500 Denali and HighCountry are the only ones with 8-speed transmission.

No, I have the Z71 that i think is one class lower.

[mcr217]

On 11/20/2020 at 8:57 AM, Black02Silverado said:

The fluid it takes is dexron HP  not dexron VI.  Using a full synthetic is best for any transmission considering the abuse they take and not getting serviced like they should.  You can use AMSOIL's ATL fluid.  If interested send me a PM with your address and I can get you a quote.

Which ATF from amsoil- the OE multi-vehicle? I use amsoil engine oil in my truck. Hear nothing but good things about them 

[mcr217]

Any idea how much fluid I'll need to buy,  or where to find that info? I am reading some pretty conflicting amounts over a wide range from 8 quarts to 14.

[Black02Silverado]

17 hours ago, mcr217 said:

Which ATF from amsoil- the OE multi-vehicle? I use amsoil engine oil in my truck. Hear nothing but good things about them 

You can use the OE OTL or the Signature Series ATL fluid and you can look up the quantities here.  

 

Basically if  you are just doing a pan drop then 9qts will cover it with a little extra, if you do an exchange then depending on what transmission you have it could be 16qts or more.  PM  me with more information and I can help with this.

[newdude]

20 hours ago, mcr217 said:

No, I have the Z71 that i think is one class lower.

 

Are you 100% that you have an 8 speed then?  What trim level is your truck?

[LDM]

23 hours ago, mcr217 said:

No, I have the Z71 that i think is one class lower.

Z71 isn't a trim level, its a suspension package option.  You need to verify what transmission you have in your truck as there is a big difference between the 6 speed and the 8 speed autos.  They use different filters and fluids.  If you really do have the 8 speed then you should be using the new Mobil 1 HP LV fluid with the new blue label.  This is the fluid that replaced the older fluid due to issue with shifting and TCC lockup in the 8 speeds.

 

https://www.amazon.com/Mobil-124715-Synthetic-Quart-Bottles/dp/B07Q3H159N

 

Otherwise, if you have the 6 speed you can just use regular Dexron VI. 

[newdude]

11 hours ago, LDM said:

Z71 isn't a trim level, its a suspension package option.  You need to verify what transmission you have in your truck as there is a big difference between the 6 speed and the 8 speed autos.  They use different filters and fluids.  If you really do have the 8 speed then you should be using the new Mobil 1 HP LV fluid with the new blue label.  This is the fluid that replaced the older fluid due to issue with shifting and TCC lockup in the 8 speeds.

 

https://www.amazon.com/Mobil-124715-Synthetic-Quart-Bottles/dp/B07Q3H159N

 

Otherwise, if you have the 6 speed you can just use regular Dexron VI. 

 

On 2014-2018 Chevy trucks, Z71 was "technically" a trim level on LT and LTZ.  You couldn't just get Z71 suspension option on an LT trim.  1LT was the regular 4x4, 2LT is a LT Z71.  Same for LTZ.  1LT/1LTZ is chrome bumpers and regular 4x4, 2LT/2LZ is Z71, body colored bumpers, Z71 instrument cluster. 

 

GMC on the other hand, Z71 was just a mechanical option 2014-2018.  

 

So if OP has an LT Z71, he has a 6 speed.  If he has an LTZ Z71, it could go either way 6 or 8 speed depending on engine option.  

Edited November 23, 2020 by newdude