SKU: 8107171698

B&M Transpak - GM TH350C (Lockup) - 30235

Sale price$167.35 Regular price$185.95
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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:
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  • 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: 8107171698

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4.8 ★★★★★
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K
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Kimberly
Pawtucket, US
★★★★★ 5
Snagged a deal
Size: 7, Color: Redwood/Gum 10
I waited and waited to get these boots! I knew I was chancing it, but they went on sale, and I snagged them! I am a size 7, and they fit nicely with socks. a little loose, barefooted, but what psycho wears boots without socks? They are comfortable and really well-made.
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Reviewed in the United States on April 8, 2026
A
Verified Purchase
ashlynnk
Dallas, US
★★★★★ 4
Cute, comfortable waterproof boots (a little snug to put on)
Size: 7, Color: Velvet Tan/Gum 2
These are really cute Chelsea-style boots and feel very comfortable once they’re on. The waterproof material is great for wet weather and the sole feels sturdy with good traction. They look stylish enough to wear casually but still feel practical for rainy days. The only downside is they can be a little difficult to put on at first because the opening is somewhat snug, but once they’re on they fit well and feel supportive. Overall they’re a great waterproof boot and I’ve enjoyed wearing them.
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Reviewed in the United States on March 17, 2026
A
Verified Purchase
Abby B
Cuba, US
★★★★★ 5
Surprisingly great for my wide feet and high instep!
Size: 10.5, Color: Velvet Tan/Gum 2
So thrilled I took a chance on these. Finding boots is impossible for me. I have wide feet, a super high instep, a bunion on one foot, and I wear a hard to find size (10.5). I ordered the 10.5 and 11 in these expecting I might need to size up for width (if I could even get them on). It was a struggle getting the 10.5s on the first time, and once I did they were somewhat uncomfortable on the top of my left foot. But I read that they would relax so decided to give it a go because I need waterproof boots for an upcoming trip and the 11s felt too long. After two days of light wear, they are already breaking in and I have no more discomfort. Getting them on is already easier and they are plenty wide enough and very comfortable to walk in. These are true to size. Super happy and worth a day of mild discomfort to break them in!
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Reviewed in the United States on March 7, 2026
E
Verified Purchase
EE
Chelsea, US
★★★★★ 5
Comfortable, sturdy, waterproof
Size: 9.5, Color: Black/Black
Loce, love, love these boots. Have walked ten miles with no foot pain around NYC. They go with everything and and are so comfortable. As they are waterproof/resistant, they get a little warm in high temps, but perfect three-season boots.
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Reviewed in the United States on May 17, 2026
K
Verified Purchase
Kate
Boise, US
★★★★★ 5
Super cute, comfortable, practical, love that they are slip on
Size: 10.5, Color: Tobacco/Black
I have worn these 2-3 times already. The first day was a school/work day so I was on my feet 9 hours and the only issue I had was with the side of the boot rubbing against my ankle. I just make sure I wear socks high enough to cover my ankles or jeans that go into the boots now for long wear days. Absolutely love them! They keep my feet dry in this snow( we live in Michigan). I had been looking for a pair like this for awhile now and was getting super frustrated that I couldn't find my size in any that I liked. I saw that they had these available in a 10.5 and I wear 11. I looked at the Sorel website reviews (since the amazon ones weren't super helpful on sizing) and they said that the boots ran big so I took a chance on the 10.5 fitting me. They fit perfect. I have long narrow feet but I could see where they would be tight or uncomfortable on someone with wider feet. I've been trying to find a pair for my mom now since she has boot envy.
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Reviewed in the United States on January 27, 2026

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