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Description
B&M Transpak - GM TH350C (Lockup) - 30235Overview: The B&M Transpak is the next step up from the B&M Shift Improver kit. It has all the features in the Shift Improver kit, plus it provides additional driver manual control (GM TH 400, 350, Ford C 6 and Chrysler Torqueflite only). B&M Transpak kit for 1980 1986 GM TH350C (Lockup) automatic transmissions. Most stock automatic transmissions won't downshift into low gear above 15 mph, and automatically upshift at a predetermined speed no matter
Overview:
The B&M® Transpak is the next step up from the B&M Shift Improver kit. It has all the features in the Shift Improver kit, plus it provides additional driver manual control (GM TH-400, 350, Ford C-6 and Chrysler Torqueflite only). B&M® Transpak™ kit for 1980-1986 GM TH350C (Lockup) automatic transmissions. Most stock automatic transmissions won't downshift into low gear above 15 mph, and automatically upshift at a predetermined speed no matter what gear you're in. With the Transpak, you can downshift at any speed, and you can hold the transmission in first gear to any speed that you want! This is an asset when you've got a modified engine, and you want additional RPMs, or you're towing a trailer or driving heavy loads downhill. Stage 1. Heavy Duty is for street rods, normal passenger vehicles or other heavy duty use. Firmer shift feel but not harsh. Improves transmission performance and life dramatically without loss of comfort and offers normal automatic operation when in Drive. Stage 2 is for Hi-Performance street use. Essentially the same as Heavy Duty mode except shifts are much quicker. Retains full automatic features and standard shift points with selector in Drive. Notes: Does Not Fit 1968-1980 GM TH350 (non-Lock-up) transmissions.
Features:
- Recalibrate's GM TH350C Automatic Transmissions
- Full Manual Control on Most Transmissions
- Improves Transmission Life
- Optimum Performance
- Firmer shifts
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1980 - 1984 | Pontiac | Bonneville | ||
| 1980 - 1981 | Pontiac | Catalina | ||
| 1981 | Pontiac | Firebird | ||
| 1980 | Pontiac | Grand Am | ||
| 1980 | Pontiac | Grand LeMans | Base | |
| 1980 | Pontiac | Grand LeMans | LE | |
| 1980 | Pontiac | Grand LeMans | Safari | |
| 1981 - 1983 | Pontiac | Grand LeMans | ||
| 1980 - 1984 | Pontiac | Grand Prix | ||
| 1980 - 1981 | Pontiac | LeMans | ||
| 1983 - 1984 | Pontiac | Parisienne | ||
| 1980 - 1983 | Oldsmobile | Custom Cruiser | ||
| 1982 - 1986 | Chevrolet | G30 | ||
| 1980 - 1984 | Chevrolet | Impala | ||
| 1982 - 1986 | Chevrolet | K10 | ||
| 1983 | Chevrolet | K10 | Scottsdale | |
| 1982 | Chevrolet | K10 Suburban | ||
| 1981 - 1986 | Chevrolet | K20 | ||
| 1982 - 1986 | Chevrolet | K20 Suburban | ||
| 1982 - 1986 | Chevrolet | K30 | ||
| 1980 - 1983 | Chevrolet | Malibu | ||
| 1980 - 1984 | Chevrolet | Monte Carlo | ||
| 1982 - 1986 | GMC | C1500 | ||
| 1982 - 1984 | GMC | C1500 Suburban | ||
| 1982 - 1986 | GMC | C2500 | ||
| 1982 - 1986 | GMC | C2500 Suburban | ||
| 1982 - 1986 | GMC | C3500 | ||
| 1981 - 1984 | GMC | Caballero | ||
| 1982 - 1986 | GMC | G1500 | ||
| 1982 - 1986 | GMC | G2500 | ||
| 1982 | GMC | G3500 | Rally | |
| 1982 | GMC | G3500 | Rally STX | |
| 1982 | GMC | G3500 | Vandura | |
| 1982 | GMC | G3500 | Magnavan | |
| 1982 | GMC | G3500 | Rally Camper Special | |
| 1982 | GMC | G3500 | Vandura Special | |
| 1984 - 1986 | GMC | G3500 | ||
| 1987 - 1988 | GMC | G3500 | Rally Custom | |
| 1982 - 1986 | GMC | Jimmy | ||
| 1982 - 1986 | GMC | K1500 | ||
| 1982 | GMC | K1500 Suburban | ||
| 1982 - 1986 | GMC | K2500 | ||
| 1982 - 1986 | GMC | K2500 Suburban | ||
| 1982 - 1986 | GMC | K3500 | ||
| 1980 - 1983 | Oldsmobile | 98 | ||
| 1980 | Oldsmobile | Cutlass | ||
| 1981 | Oldsmobile | Cutlass | LS | |
| 1981 | Oldsmobile | Cutlass | Brougham | |
| 1980 | Oldsmobile | Cutlass Salon | ||
| 1980 - 1984 | Oldsmobile | Cutlass Calais | ||
| 1980 - 1983 | Oldsmobile | Cutlass Cruiser | ||
| 1980 - 1984 | Oldsmobile | Cutlass Supreme | ||
| 1980 - 1983 | Oldsmobile | Delta 88 | ||
| 1982 - 1983 | Oldsmobile | Toronado | ||
| 1978 - 1981 | Buick | Century | ||
| 1980 - 1983 | Buick | Electra | ||
| 1980 - 1983 | Buick | LeSabre | ||
| 1980 - 1983 | Buick | Estate Wagon | ||
| 1980 - 1984 | Buick | Regal | ||
| 1982 | Cadillac | DeVille | ||
| 1982 | Cadillac | Fleetwood | Brougham | |
| 1982 | Cadillac | Fleetwood | Brougham d'Elegance | |
| 1982 - 1986 | Chevrolet | K5 Blazer | ||
| 1982 - 1986 | Chevrolet | C10 | ||
| 1982 - 1984 | Chevrolet | C10 Suburban | ||
| 1982 - 1986 | Chevrolet | C20 | ||
| 1982 - 1986 | Chevrolet | C20 Suburban | ||
| 1982 - 1986 | Chevrolet | C30 | ||
| 1981 | Chevrolet | Camaro | ||
| 1980 - 1984 | Chevrolet | Caprice | ||
| 1981 | Chevrolet | Corvette | ||
| 1980 - 1984 | Chevrolet | El Camino | ||
| 1982 - 1986 | Chevrolet | G10 | ||
| 1982 - 1986 | Chevrolet | G20 |
Specs:
| Automotive Item Grade | High Performance |
|---|---|
| Brand | B&M |
| California Proposition 65 Chemical Name | Cadmium and cadmium compounds |
| California Proposition 65 Required | Yes |
| Emission Code | 5 |
| Gasket Included | Yes |
| Instructions Included | Yes |
| Product Type | Automatic Transmission Valve Body Kit |
| Warning | California Proposition 65 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.1 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Cooling and holds shape.
Color: Blue-ice Plus, Size: Queen(Pack of 2), Color: Blue-ice Plus, Size: Queen(Pack of 2)
Very nice pillow for the price is also holding up well and holding shape very cool and comfortable to the touch. Best pillow I found in a long time.
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Best Pillow Ever
Color: Blue-ice Plus, Size: Queen(Pack of 2)
Best pillow ever. Although it still gets "hot", it does take longer to get "hot". I love this pillow. I was buying a new pillow almost every 3 months. Other pillows would either remain rock hard or go flat. I was concerned at first when reading the description as I though the memory foam would be big pieces. They are soft fluffy pieces. I had to remove almost half of the foam to get the pillow to what works for me. I have not had to put any filler back in. Maybe in a couple of more months I may have to put a bit more in, but it is holding it's shape and not going flat. I do fluff it every night. This helps. I am a stomach sleeper. I have bought the expensive purple pillow and hated it so much I gave it to my daughter. This QUTOOL Pillow is the best! I bought a 2 pack. Have not used the other pillow yet, but I feel I may actually go years for once without having to buy a pillow as I have the 2nd one set aside if the first one gets to a point in need replacement. I have bought Dollar Store pillows. I have bought $300 pillows. None of them even come close to this pillow and the way you can adjust this pillow for you. The pillows came in a white mesh like bag. I keep all the unused "stuffing" in this bag. I have it hanging in my closet and I just fluff the bag once a month to keep the filling fresh so it is ready if and when I need it. Coming from someone who has trouble staying asleep, neck issues, a stomach sleeper who hate those flat pillows manufacturers think stomach sleepers like but actually hate, buy this pillow. Just buy it. Best Pillow for a picky person like me. Buy 2 or more so if you have to stay at a hotel, you can take your own pillow.
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Reviewed in the United States on June 15, 2025
★★★★★ 4
Slippery Pillow
Color: Blue-ice Plus, Size: Queen(Pack of 2)
Nice and cooling but it’s so slick my pillow sheet doesn’t want to stay on.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Foam Mattress NEEDs Foam Pillows
Color: Blue-ice Plus, Size: King(Pack of 2), Color: Blue-ice Plus, Size: King(Pack of 2)
10 stars!! Quality foam, structure & price. Best bang for my buck.
HRV, readiness & total sleep score metrics increased drastically this week. See screenshot :)
Support:
Molds and cushions every crevice under my neck and above shoulders. So comfy
Size:
Adjustable loft but king length is perfect to hug and rest your head. Love love love. The 1st 2 nights were uncomfortable with pillow as is, first night I was up at 3am half asleep pulling foam out but wasn't enough. The second night at 2am I pulled out more stuffing. I was getting frustrated.. my Oura ring showed both nights I was awake every hour. Not good. Before the 3rd night I pulled enough to fill the bag the 2 pillows arrived in. Boom -8hrs sleep and for the first time ii years I achieved 17% Deep sleep. Huge.
Weight:
Perfect weight with adjustment. Squishy and molds to b the contour of my neck and shoulders
Softness:
Like the baby bear.. just right.
Comfort:
Very comfortable after removing 30% foam in both pillows. I actually now have enough to make a 3rd pillow, replace old foam, or adjust OGs, Still to early to measure.
If you have a foam mattress that contours your body but not your head you'll end up with neck and/or back pain from head being elevated- not sinking/molding the body into a foam mattress.
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Reviewed in the United States on July 1, 2025
★★★★★ 3
These are not sized correctly - beware
Color: Blue-ice Plus, Size: King(Pack of 2), Color: Blue-ice Plus, Size: King(Pack of 2)
Edit: I was going to return these pillows but the seller contacted me and offered a full refund due to the size issue without having to send the pillows back.
I am happy with this and happy to keep them on a spare queen size bed as they really are nice pillows. Just the wrong size.
pros: they are a nice pillow and the cooling feature is really great, and you can adjust to your liking
cons: absolutely wrong size. Ordered King, tag says king, all measurements on listing and tag say 20x36, in reality they are more like 20x30. Definitely Queen pillows being sold as King.
I did not see any reviews at first about size issues but after I got these and did a search it does look like others have had the same problem.
A shame, would have given them a great review if they were the correct size
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Reviewed in the United States on February 23, 2026
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