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6L80 6L90 8L90 6L45 6L50 Bypass Valve Upgrade Kit Superior STL010

Phoenix Transmission Parts
(34437)
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US $60.12
ApproximatelyAU $92.86
Condition:
Brand New
More information - About this item condition
4 available4 sold
Popular item. 4 have already sold.
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Postage:
Free USPS First Class®.
Located in: Seminole, Florida, United States
Delivery:
Estimated between Wed, 6 Aug and Mon, 11 Aug to 94104
Delivery time is estimated using our proprietary method which is based on the buyer's proximity to the item location, the postage service selected, the seller's postage history, and other factors. Delivery times may vary, especially during peak periods.
Returns:
30-day returns. Seller pays for return postage.
Payments:
     Diners Club

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eBay item number:354655111509
Last updated on 04 Jun, 2025 07:32:25 AESTView all revisionsView all revisions

Item specifics

Condition
Brand New
Brand
Superior
Type
Thermal Bypass Kit
Manufacturer Warranty
Yes
Fitment Type
Performance/Custom
Items Included
Thermal Bypass Kit
Manufacturer Part Number
STL010
Country/Region of Manufacture
United States
UPC
Does not apply

Item description from the seller

About this seller

Phoenix Transmission Parts

98.4% positive Feedback•123K items sold

Joined Jul 2006
Automatic Transmission Parts: Master Rebuild Kits, Solenoids, Performance Stall and Diesel Torque Converters. We sell OE and High Performance friction plates from the following tier 1 and tier 2 ...
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Detailed seller ratings

Average for the last 12 months
Accurate description
4.8
Reasonable postage costs
5.0
Postage speed
4.9
Communication
5.0

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Seller feedback (37,236)

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    • 1***n (569)- Feedback left by buyer.
      Past year
      Verified purchase
      Fast shipping
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    Product ratings and reviews

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    4.9
    137 product ratings
    • 128 users rated this 5 out of 5 stars
    • 6 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
    • 2 users rated this 1 out of 5 stars

    Would recommend

    Good value

    Good quality

    Most relevant reviews

    See all 132 reviews
    • by svy57
      04 Aug, 2020Top favourable review

      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
      02 Oct, 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
      06 May, 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
      18 Oct, 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

    • by jevicdriver
      19 Sep, 2022

      Works pretty much as advertised

      Very very easy to install. Just follow the instructions. On average lowered transmission temp. 6-10 degrees. One time apparently was stuck. Just happened to look at transmission temp. Was 198 never been that high. Started to lower to 181. So far only time that happened. Usually now stays about 178-185.

      Verified purchase: YesCondition: NewSold by: transmissionjobber

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