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6L, 8L & 10L Automatic Transmission Cooler Adapter with Thermostat (TGM-100-T2)
SHIPPING - RETURNS - WARRANTY - CANCELLATION POLICY
*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
SKU: TGM-100-T2
Improved Racing is proud to announce the first direct bolt-on, thermostatic transmission fluid cooler adapter for GM's 6L, 8L, and 10L automatic transmissions.
The adapter's built-in thermostat automatically bypasses the transmission cooler until the fluid reaches operating temperature. This eliminates rough shifts caused by overcooling the transmission, reduces wear, and improves horsepower and longevity. You can now get your transmission up to temp quickly and still have all of the cooling capacity you need for high load activities such as towing or racing. It's the best of both worlds!
The adapter features standard female -6AN O-ring boss ports that accept optional male adapter fittings for 5/16", 3/8", 1/2" hose barbs or male AN fittings. This allows you to run common rubber transmission cooler lines or braided AN lines.
Important Application Notes:
- This adapter must be used in conjunction with an external transmission fluid cooler.
- This adapter does not connect directly to the factory transmission cooler lines. Aftermarket lines or adapter fittings must be used.
- This 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. Note that 8L45 and 8L90 transmissions rough shifting issues can often be resolved through GM TSB 18-NA-355 and by simply flushing the transmission fluid.
Features and Benefits
- 100% bolt-on for 6L, 8L, and 10L series General Motors automatic transmissions
- Built-in thermostat reduces wear, improves horsepower, and eliminates rough shifting by preventing fluid temperatures from dropping below optimal levels
- Rebuildable: Rebuild kits available, or send it back to us for a rebuild under warranty
- -6AN female O-ring boss ports for connection flexibility; choose any line size and type you want
- 6061-T6 billet aluminum construction with black MIL-A-8625 Type II anodized finish
- Uses the factory GM transmission cooler adapter gasket
- Lifetime Warranty
- Made in the USA
Optional hose barb and male AN adapter fittings available
Temperature Rating Specifications
| Part Number | Typ. Stabilization Temp | Activation Temp | Full Flow Temp |
| TGM-100-T1 | 145ºF (63ºC) | 140ºF (60ºC) | 163ºF (73ºC) |
| TGM-100-T2 | 165ºF (74ºC) | 160ºF (71ºC) | 181ºF (83ºC) |
Includes
- 1x TGM-100 transmission cooler adapter block with built-in thermostat
- 1x Transmission cooler adapter gasket, GM Part # 23135703
- 1x Zinc-plated steel mounting screws
- Installation instructions
Applications
- Fits most General Motors 6L, 8L, and 10L series automatic transmissions, including:
- All 45, 50, 60, 70, 80, 90 variants, and aftermarket performance versions
- Fits both E and non-E transmission variants
- Applications include:
- 6L45
- 6L50
- 6L80 / 6L80-E
- 6L90 / 6L90-E
- 8L45 / 8L45-E
- 8L90 / 8L90-E
- 10L80 / 10L80-E
- 10L90 / 10L90-E
- Note: Has not been verified to fit Allison 10L1000 transmissions (RPO code MGM & MGU)
- Built-in thermostat reduces wear, improves horsepower, and eliminates other issues caused by overcooling of the transmission fluid
- 100% bolt-on for 6L, 8L, and 10L series General Motors automatic transmissions
- Two thermostat temperatures to choose from: 140ºF and 160ºF
- -6AN female O-ring boss ports for connection flexibility; choose any line size and type you want
- Lifetime Warranty. Made in the USA.
| Drop Ship Item | No
|
|---|---|
| Special Order Item | No
|
| Manufacturer | Improved Racing
|
| Part Weight | 15.6 oz (443 g)
|
| Primary Material | 6061-T6 aluminum
|
| Finish | Type II Anodized
|
| Color | Black
|
| Minimum Operating Temperature | -40°F (-40°C)
|
| Maximum Operating Temperature | 302°F (150°C)
|
| Inlet Port Size | -6AN O-Ring Boss Female
|
| Outlet Port Size | -6AN O-Ring Boss Female
|
| Maximum Operating Pressure | 300 psi (20.68 bar)
|
| Max Recommended Flow Rate | Up to 5 GPM (19 LPM)
|
| Fluid Compatibility | Gear oil
Transmission fluid |
Our History
For 23 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.