SKU: 1684536098

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
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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: 1684536098

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4.1 ★★★★★
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Product Reviews
B
Verified Purchase
Brent Galey
Pawtucket, US
★★★★★ 5
Perfect . Very good purchase
Color: 5885 Siver Stainless Steel/hon Dial
Love it , good quality that came in an attractive packaging with a tool and a sleeve to protect your watch . Definitely going to order 2 more watches of different color
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 27, 2026
J
Verified Purchase
Jose Correa
New York, US
★★★★★ 5
Stunning Automatic Watch With TopTier Durability and Precision
Color: Grey
“I got this Tissot PRX for my cousin’s birthday and bro fell in LOVE instantly. This thing keeps time like a beast, never slows down, never lags. Automatic movement, so no batteries, no drama. Durability? Stupid good. You can hit it, bump it, live life rough, it still looks box fresh. Size wise it was almost perfect. I just had to remove two links, nothing big. It’s light, functional, comfortable, doesn’t weigh you down, doesn’t get in the way but more importantly I can say this watch is in everyone’s eyesight when we wear it. Cause of course I had to get another one! Basically. I gave him a very nice piece as a gift, and now he’s walking around like he owns Switzerland.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 11, 2025
C
Verified Purchase
Cienfuegos
San Leandro, US
★★★★★ 5
Great watch!!!!
Color: Grey
Excellent quality, one of the best, elegant.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
T
Verified Purchase
T. H.
Lexington, US
★★★★★ 5
Excellent value for an automatic watch, keeps VERY good time.
Color: Grey, Color: Grey
I've only had the watch for a day but wanted to leave a quick review on it to share a couple of notes. So far it keeps VERY good time, better than any of the automatics I own (including a Rolex Submariner, Tag Heuer Aquaracer, Tag Heuer Formula One, and several other sub $1k watches). I set it to an atomic time app on my phone yesterday and 24 hours later it's still SPOT on - hasn't gained/lost even a 1/10 of a second. I was shocked to see it's kept PERFECT time for the last day, I'm really blown away so far. I've worn it the entire time, we'll see how well it keeps time while being stored in a winder. This picture shown is the watch with a 22mm leather band on it, fit's without any issues (just need to squeeze in the leather a tad). I doubt it would work with a 22mm metal bracelet, but leather works great. Just FYI since the 21mm lug width is kind of odd. The face isn't quite a lustrious as the images make it look, but it's still a great-looking watch. For a sub $1000 automatic you can't go wrong, this is a fantastic watch at a great price. It'll be my daily driver for some time I'm sure. If I have any issues in the future I'll update the review.
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Reviewed in the United States on March 22, 2021
B
Verified Purchase
Beniamin Grigoryan
Lexington, US
★★★★★ 5
It looks really cool and striking.
Color: Grey, Color: Grey
Really cool and beautiful watch. Although my specific unit runs 5 seconds fast every day—at first it’s annoying, but eventually you stop caring. 🤣
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026

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