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Description
8HP DODGE RAM Thermostatic transmission cooler adapterHPR Tuning has partnered with the American company Improved Racing to create the first bolt on transmission fluid adapter with a thermostat for the 8HP transmissions found in 2012+ Ram 1500 trucks. This thermostat includes adapter sleeves for transmissions with 17mm and 18. 5mm unthreaded ports. The adapter's built in thermostat automatically bypasses the transmission cooler until the fluid reaches 160F. The thermostat reduces rough shifts caused by
HPR Tuning has partnered with the American company Improved Racing to create the first bolt-on transmission fluid adapter with a thermostat for the 8HP transmissions found in 2012+ Ram 1500 trucks. This thermostat includes adapter sleeves for transmissions with 17mm and 18.5mm unthreaded ports.
The adapter's built-in thermostat automatically bypasses the transmission cooler until the fluid reaches 160ºF. The thermostat reduces rough shifts caused by overcooled transmission fluid, reduces wear, and improves efficiency and horsepower. The transmission can now reach operating temps quickly with large aftermarket transmission coolers. This allows for high cooling capacity without sacrificing drivability.
The adapter features -8AN male connections for aftermarket AN lines.
Important Application Notes:
- The adapter can only be used in conjunction with external transmission fluid coolers.
- The adapter does not directly connect to the factory lines. Aftermarket AN lines must be used.
- The adapter will only help resolve rough shifting issues if they are caused by overcooling of the transmission, usually due to the addition of a larger aftermarket transmission cooler.
Features and Benefits
- Bolt-on fitment for 2012+ Ram 1500 truck 8HP series automatic transmissions with 17mm and 18.5mm unthreaded ports.
- Built-in thermostat prevents temperatures from dropping below optimal levels, reducing wear, improving efficiency and horsepower, and helping to eliminate rough shifting.
- -8AN male connections.
- 6061-T6 billet aluminum construction with black MIL-A-8625 Type II anodized finish.
- Thermostat portion is made in the USA by Improved Racing. Adapter portion is made by us at HPR Tuning.
Temperature Rating Specifications
Note: The 160ºF temperature rating is recommended for most applications.
| Part Number | Typ. Stabilization Temp | Activation Temp | Full Flow Temp |
| TCH-102-T2 | 165ºF (74ºC) | 160ºF (71ºC) | 181ºF (83ºC) |
Includes
- 1x TCH-102 transmission cooler adapter block with built-in thermostat.
- 2x 17mm and 18.5mm adapter sleeves with O-ring seals.
- 1x Zinc-plated steel mounting screw.
- Installation instructions.
Applications
- 2012+ Ram 1500 truck 8HP series automatic transmissions with 17mm and 18.5mm unthreaded ports.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 5
Suspense and sexy
Format: Kindle
An very interesting spice of sexy and suspense with quirky and funny dialog that brings out the best of each one.
Worth the read.
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Reviewed in the United States on December 18, 2025
★★★★★ 4
reverse harem with heart and a HEA
Format: Kindle
Author duo Sasha Moon and Cassie Cole delivered a well written reverse harem romance read in Billionaire's Nanny. Our female lead Tessa starts as a server at an event and meets a sweet lil girl Tabitha. Damian is Tabitha's father and after the event all he hears about it Tessa and so, in his billionaire style shows up unannounced to offer Tessa a job as Tabitha's nanny that she can't refuse. Damian may be the beginning but there is also Theo, head of security and Nico, chauffeur and chef. These three go everywhere together. I love how our authors introduce us to the art world, exotic places traveled. They weave together the heat and sweet so well and I love that there is a storyline with mystery, heart just as much as the heat the characters bring. A wonderful HEA is to be had as well! A really good read!
I received a free copy of this book via Booksprout and am voluntarily leaving a review.
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Reviewed in the United States on October 11, 2025
★★★★★ 5
So many plot twists and turns!
Format: Kindle
In Billionaire's Nanny, Tessa is a catering waitress. While working an event, she encounters Tabitha, a precocious 6 year old who is bored and seeking her own form of entertainment when left to entertain herself at her father's event. Taking the child under her wings and keeping her out of trouble, little does Tessa know that with that simple act, the trajectory of her life will forever be altered. Damian is Tabitha's father. He's wildly successful in the art world and a billionaire. Theo is his body guard and head of security, while Nico is his chauffeur (of any form of transportation that moves) and personal chef. The three travel everywhere together.
Damian is out to right the wrongs of the previous generations of his family. He wants his daughter to be proud of her legacy and he will do anything to ensure that she has this opportunity, even if it requires lying, stealing and riding the fine line between what is morally and legally right and wrong. In order to do this, he desperately needs the help of someone he trusts to watch over his daughter. Tabitha won't stop talking about Tessa and the time they spent together at the event. Without notice, Damian shows up on Tessa's doorstep and orders her to join them as Tabitha's nanny. Needing the money to help care for her siblings, Tessa agrees. What ensues is a quest for Tessa to learn who to trust. There is an air of mystery continually surrounding the three men that leaves Tessa feeling uneasy. Secretive meetings and phone calls. Continually jet setting from country to country. Locked vaults and rooms depicted on doll houses as nothing more than empty spaces. Who are these men? Are they good guys or bad? Tessa struggles with her growing feelings as she finds herself equally attracted to them all. As each man spends more time with Tessa and finds himself intrigued by her, each wants her for himself. These are three alpha males all vying for pole position in Tessa's heart. Little do they know, Tessa isn't interested in having only one in pole position. For her, it's all or nothing. Will they be able to give up ultimate control and learn to share?
Authors Sasha Moon and Cassie Cole have done it again! This is an extremely well developed novel. Normally I am quick to determine the plot and the direction it's taking. If there's a mystery in a plot, I've usually solved it by 25% of the way into the book. The plot of this book was hard to guess, which is actually what makes this book so fantastic! I love the twists and the turns; the hint at explanations without actually not explaining much of anything at all. LOL It kept me engrossed and wanting to know what the heck was going on. The authors did a fabulous job of slowly dispersing tidbits of plot weaving intrigue and mystery throughout the entire length of the book. This book kept me focused the entire time I was reading it.
I love that Tessa is a strong female lead. She isn't afraid to back down or ask questions when things don't make sense. She also has a soft side that just wants to be loved and to feel affection. She is like a mollusk, hard on the outside yet soft on the inside and in her heart. As much as she would like to trust, she has learned that you cannot blindly trust. So she asked questions. She watches. She tries to determine if her employer Damian is truly an individual that is upstanding and one whom she can trust with her life and her heart. The three men in the story are harder for the reader to get to know, especially Damian's character. The author slowly feeds you information with regards to their personalities, but even with the air of mystery surrounding them, there's something likeable about each of them. I couldn't help rooting for them all to get their HEA.
This book is an absolute definite must read!
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Reviewed in the United States on October 8, 2025
★★★★★ 3
Not your average Billionaire's Nanny
Format: Kindle
A unique twist on a Billionaires Nanny plot. I was immediately drawn into the story and it kept me guessing on how it would unfold. The chemistry between Tessa, Damien, Theo and Nico was HOT. The spicy scenes were intense and everything you would expect from a Cassie Cole book. I had a difficult time connecting with Tessa. Some of her actions and unexplained entitlement to know everything going on around her seemed off to me but Theo was my absolute favorite.
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Reviewed in the United States on October 7, 2025
★★★★★ 5
Short, cute, straight to the point
Format: Kindle
This is the type of fast pace stories I love to read. I felt nothing felt incomplete. Everything went together. Loved the men loved the best friend and the Fmc. Definitely would recommend this book.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 26, 2026
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