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Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010 with Bypass Gasket

Whatever It Takes Transmission
(34113)
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US $45.50/ea
Condition:
New
More than 10 available878 sold
Bulk savings quantity 1
Bulk savings:
Buy 4 or more for 40.95 each one
This one's trending. 878 have already sold.
People want this. 200 people are watching this.
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Free UPS Ground.
Located in: Shepherdsville, Kentucky, United States
Delivery:
Estimated between Fri, Dec 5 and Tue, Dec 9 to 94104
Estimated delivery dates - opens in a new window or tab include seller's handling time, origin ZIP Code, destination ZIP Code and time of acceptance and will depend on shipping service selected and receipt of cleared paymentcleared payment - opens in a new window or tab. Delivery times may vary, especially during peak periods.
Ships today if you order in the next 8 hrs 28 mins
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30 days returns. Seller pays for return shipping.
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eBay item number:166719533756
Last updated on Dec 01, 2025 12:38:57 PSTView all revisionsView all revisions

Item specifics

Condition
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ...
OE Spec or Performance/Custom
OE Spec
Brand
SUPERIOR
Other Part Number
A104996-5K
Interchange Part Number
15251488, STL010, 45378AB, A45996A, T45996A
Manufacturer Warranty
No Warranty
OE/OEM Part Number
15251488, STL010
Manufacturer Part Number
STL010
Country/Region of Manufacture
United States
Category

Item description from the seller

About this seller

Whatever It Takes Transmission

99.8% positive feedback•113K items sold

Joined Dec 2000
Whatever It Takes is an industry veteran in the transmission parts supply business. Our goal is to provide true customer service, high quality parts, an experienced sales force, and the highest levels ...
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Detailed seller ratings

Average for the last 12 months
Accurate description
4.9
Reasonable shipping cost
5.0
Shipping speed
5.0
Communication
5.0

Popular categories from this store

See allcategories
Automatic Transmission PartsStandard Transmission PartsTransfer Case PartsTRANSMISSION OIL COOLERSFluids & LubesToolsOther

Seller feedback (37,884)

All ratingsselected
Positive
Neutral
Negative
  • h***h (919)- Feedback left by buyer.
    Past year
    Verified purchase
    This product works awesome. Transmission temps went down 30 to 40 degrees. From the 190s to 150s, 160s. Easy install.
  • a***c (385)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Great product, brand new, great value, looks amazing, easy to install if you’re handy, fast shipping A+
  • 6***i (7)- Feedback left by buyer.
    Past year
    Verified purchase
    Looked like a quality product, a breeze to install. Over 1000 miles on the vehicular since install… no problems so far, seems to work as advertised.
See all feedback

Product ratings and reviews

Learn more
4.9
160 product ratings
  • 149 users rated this 5 out of 5 stars
  • 7 users rated this 4 out of 5 stars
  • 1 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 3 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 155 reviews
  • by jador624
    Oct 19, 2025Top favorable review

    Top quality product which works great! I...

    Top quality product which works great! Installation was a breeze! Cool my transmission right down! If you have a Chevy truck with transmission issues don’t drive another mile without buying this part installing it!

    Verified purchase: YesCondition: NewSold by: wittrans

  • by svy57
    Aug 04, 2020

    Upgrade Worth every penny.

    Wish this came out sooner, Huge difference, Transmission temperature like its supposed to be now. Thanks to the Engineers at Superior Transmission and the people at Shift Co. and anybody else who designed and made this product available for us truck owners.

    Verified purchase: YesCondition: NewSold by: maxxindustries

  • by matty-nj
    Oct 01, 2023

    Works great to lower transmission temp

    I can't speak to the long term because I only installed it about 150 miles ago. However, it was easy to do, instantly lowered my transmission temps and has a fail safe should the cooler clog. My transmission temp was regularly around 194 driving around town. Now it's around 156.

    Verified purchase: YesCondition: NewSold by: tranzdepot

  • by anthony1979420
    May 06, 2022

    Cooling system

    It's working very well came in pretty quick easy work anybody should be able to do that that ones a truck😉 Running transmission temp before switching out part was almost 200 It dropped by 20 to 30%.

    Verified purchase: YesCondition: NewSold by: maxxindustries

  • by aa.nnot.5goysyrqfk
    Oct 17, 2024

    Installed next day, works Great, pre upd...

    Installed next day, works Great, pre update fluid temp 190 degrees, Crazy !!!! Now 120 to 154 degrees new filter and flushed hole system new dex 6. 2016 gmc 4x4 w/60,000 miles, fluid was almost black. So far so good , shifts good, with cooler temps this tranny might make it. My uncle just moved back to the area, so the soonest I could get my hands on He's truck. With this sure cool kit installed he's got a chance.

    Verified purchase: YesCondition: NewSold by: wittrans

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