SKU: 46468193997

Synapse Auto Allison T14A/A40 TCM Exchange 06-08 GM 6.6L Duramax LLY/LBZ/LMM

$540.00 $600.00
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Ships within 48 hours · Estimated delivery Aug 20 - Aug 25

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Description

Synapse Auto Allison T14A/A40 TCM Exchange 06-08 GM 6.6L Duramax LLY/LBZ/LMMLooking for a dependable fix for your failing Allison transmission control module? The Synapse Allison T14A A40 TCM Exchange is designed to restore proper shifting, transmission communication, and overall drivability when factory modules begin to fail. Common symptoms such as harsh shifting, limp mode activation, gear selection issues, or transmission related trouble codes can often be traced to a faulty TCM. This exchange unit offers a cost effective

Looking for a dependable fix for your failing Allison transmission control module? The Synapse Allison T14A / A40 TCM Exchange is designed to restore proper shifting, transmission communication, and overall drivability when factory modules begin to fail. Common symptoms such as harsh shifting, limp mode activation, gear selection issues, or transmission-related trouble codes can often be traced to a faulty TCM. This exchange unit offers a cost-effective solution that helps get your truck back on the road with confidence.

Professionally rebuilt and tested for reliable performance, each Synapse TCM is engineered to meet or exceed OEM functionality standards. Designed as a direct replacement for the factory Allison T14A / A40 module, every unit undergoes extensive testing to help ensure proper operation and communication with your truck’s transmission system.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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
SKU: 46468193997

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4.0 ★★★★★
Based on 24 reviews
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Verified Purchase
Finngirl
Dallas, US
★★★★★ 5
Good quality, smooth feel
I got these briefs so recently that have washed just one pair so far. First off, these are very comfortable, the material is soft & bordering silky, good quality sewing. Wash well and minimal if any shrinkage. They do come a bit wrinkled from the dryer but hey, these are underwear and will go on smoothly. If it were a t-shirt, I would look sloppy. I feel the sizing is accurate. No rolling and these don't announce themselves under clothing. Planning on getting more of these boxers and replacing my old panties.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 31, 2026
S
Verified Purchase
Skurtzo
Lexington, US
★★★★★ 4
A little snug on the thighs
Size: Medium, Color: Multicoloured G (5-pack)
Super comfy, soft and thin. For reference, I'm 5'6", 135, athletic build. I bought medium. I almost returned them because I thought they were a bit too snug on my thighs, and my thighs are not large at all. I was concerned about panty lines under snug clothing. But, because they're thin, I figured they would probably stretch, so I kept them. So far, I've only worn them under a night shirt, but they're super comfortable and they dont ride up at all. Very nice, but if your thighs are a little thick, you probably won't like them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 29, 2025
S
Verified Purchase
Shanna
Waukegan, US
★★★★★ 5
Functional + Sexy
Size: Small, Color: Multicoloured E-(5-pack), Size: Small, Color: Multicoloured E-(5-pack)
Not only do these feel good, my husband can’t keep his hands off me. They fit so good and are soft. I change into these to sleep but also just use them as shorts to wear around the house. They’re comfortable and don’t slide around. I got a size small and I’m 100lbs.
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Reviewed in the United States on April 13, 2026
C
Verified Purchase
ClairY
Natrona Heights, US
★★★★★ 5
Finally!
Size: X-Large, Color: All Black D (5-pack)
Finally, comfortable underwear that don’t end up giving me a wedgie. I have a round booty and most cuts of underwear end up shifting as I walk and sit. The hem of the underwear comes right under my cheeks and the lightweight material ensures there’s no panty line and no shifting to where I don’t want them! I’m definitely purchasing more.
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Reviewed in the United States on May 17, 2026
A
Verified Purchase
Amazon Customer
Port Orchard, US
★★★★★ 3
Ehh
Size: Medium, Color: Multicoloured E-(5-pack)
Very thin, still comfy but very thin material. Super soft though. I've worn and washed and they have held up but I won't be repurchasing bc these are so thin
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026

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