SKU: 59587189463

B&M Transpak - GM TH350 Transmissions - 30228

Sale price$155.66 Regular price$172.95
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Description

B&M Transpak - GM TH350 Transmissions - 30228Overview: 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 1968 1981 GM TH350 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

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 1968-1981 GM TH350 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 GM TH350C transmissions.

Features:

  • Recalibrate's GM TH350 Automatic Transmissions
  • Full Manual Control on Most Transmissions
  • Over 65 Years of B&M Quality
  • Improves Transmission Life
  • Optimum Performance
  • Firmer shifts

Application:

Year Make Model Submodel Engine Size
1969 - 1980 Chevrolet Impala
1975 - 1981 Chevrolet K10
1969 - 1981 Chevrolet K10 Suburban
1975 - 1980 Chevrolet K20
1969 - 1981 Chevrolet K20 Suburban
1977 - 1981 Chevrolet K30
1975 - 1976 Chevrolet Laguna
1975 - 1980 Chevrolet Malibu
1970 - 1980 Chevrolet Monte Carlo
1975 - 1980 Chevrolet Monza
1970 - 1975 Oldsmobile Vista Cruiser
1972 - 1980 Pontiac Catalina
1969 - 1981 Pontiac Firebird
1973 - 1980 Pontiac Grand Am
1968 - 1980 Pontiac LeMans
1971 - 1977 Pontiac Ventura
1975 - 1978 Pontiac Grand Safari
1970 - 1974 Chevrolet G30 Van
1968 - 1972 Buick Sportwagon
1968 - 1970 Pontiac Tempest Base
1968 Pontiac Tempest Safari
1969 Buick Special
1969 Pontiac Tempest
1970 - 1974 GMC G35/G3500 Van
1975 - 1981 Chevrolet P20
1975 - 1981 Chevrolet P30
1974 - 1977 Chevrolet Vega
1975 - 1978 GMC C15
1979 - 1981 GMC C1500
1975 - 1978 GMC C15 Suburban
1979 - 1981 GMC C1500 Suburban
1975 - 1978 GMC C25
1979 - 1981 GMC C2500
1975 - 1978 GMC C25 Suburban
1979 - 1981 GMC C2500 Suburban
1975 - 1978 GMC C35
1979 - 1981 GMC C3500
1978 - 1980 GMC Caballero
1975 - 1978 GMC G15
1979 - 1981 GMC G1500
1975 - 1978 GMC G25
1979 - 1981 GMC G2500
1975 - 1978 GMC G35
1979 - 1980 GMC G3500
1981 GMC G3500 Rally
1981 GMC G3500 Rally STX
1981 GMC G3500 Vandura
1975 Pontiac Firebird Formula
1975 Pontiac Firebird Trans Am
1975 Pontiac Grand LeMans
1976 - 1980 Pontiac Grand LeMans Base
1977 - 1980 Pontiac Grand LeMans Safari
1976 - 1980 Pontiac Grand Prix
1976 - 1977 Pontiac LeMans Base
1976 - 1977 Pontiac LeMans Sport
1977 Pontiac LeMans Safari
1969 - 1974 Chevrolet C10 Pickup
1969 - 1981 Chevrolet C10 Suburban
1969 - 1974 Chevrolet C20 Pickup
1969 - 1981 Chevrolet C20 Suburban
1977 - 1979 Pontiac Phoenix
1976 - 1980 Pontiac Sunbird
1973 - 1980 Oldsmobile Custom Cruiser
1973 - 1975 Buick Apollo
1971 - 1973 Buick Centurion
1973 - 1981 Buick Century
1971 - 1980 Buick Estate Wagon
1970 - 1972 Buick GS
1970 - 1980 Buick LeSabre
1974 Buick LeSabre Base
1973 - 1981 Buick Regal
1969 Buick Skylark Base
1970 - 1979 Buick Skylark
1970 - 1975 Chevrolet Bel Air
1970 - 1972 Chevrolet Biscayne
1969 - 1974 Chevrolet Blazer
1972 Chevrolet Brookwood
1975 - 1981 Chevrolet C30
1969 - 1981 Chevrolet Camaro
1970 - 1980 Chevrolet Caprice
1975 - 1980 Chevrolet Corvette
1969 - 1980 Chevrolet El Camino
1975 - 1981 Chevrolet G10
1975 - 1981 Chevrolet G20
1975 - 1981 Chevrolet G30
1979 - 1981 GMC K1500 Suburban
1975 - 1978 GMC K25
1979 - 1981 GMC K2500
1969 - 1974 Chevrolet C30 Pickup
1973 Chevrolet Camaro Base
1973 Chevrolet Camaro RS
1973 Chevrolet Camaro LT
1973 Chevrolet Camaro Z28
1970 - 1972 Chevrolet Chevelle Base
1971 Chevrolet Chevelle
1972 Chevrolet Chevelle SS
1972 Chevrolet Chevelle Malibu
1969 - 1974 Chevrolet G10 Van
1969 - 1974 Chevrolet G20 Van
1968 - 1974 Chevrolet K10 Pickup
1969 - 1974 Chevrolet K20 Pickup
1969 - 1974 Chevrolet K30 Pickup
1975 - 1980 Buick Skyhawk
1980 Cadillac DeVille
1980 Cadillac Fleetwood Brougham
1980 Cadillac Fleetwood Brougham d'Elegance
1975 - 1981 Chevrolet K5 Blazer
1975 - 1981 Chevrolet C10
1975 - 1981 Chevrolet C20
1975 Buick Century Base
1975 Buick Century Custom
1975 Buick Century Luxus
1975 Buick Century Special
1975 - 1980 Buick Electra
1975 - 1978 Buick Riviera
1975 - 1978 GMC K25 Suburban
1979 - 1981 GMC K2500 Suburban
1977 - 1978 GMC K35
1979 - 1981 GMC K3500
1975 - 1978 GMC P15
1979 - 1980 GMC P1500
1975 - 1978 GMC P25
1979 - 1981 GMC P2500
1975 - 1978 GMC P35
1979 - 1981 GMC P3500
1971 - 1977 GMC Sprint
1972 - 1980 Oldsmobile 98
1968 - 1980 Oldsmobile Cutlass
1981 Oldsmobile Cutlass LS
1975 - 1980 Oldsmobile Cutlass Salon
1976 Oldsmobile Cutlass Tiara
1978 - 1980 Oldsmobile Cutlass Calais
1980 Oldsmobile Cutlass Cruiser
1975 - 1980 Oldsmobile Cutlass Supreme
1970 - 1980 Oldsmobile Delta 88
1973 - 1979 Oldsmobile Omega
1975 - 1980 Oldsmobile Starfire
1975 - 1977 Pontiac Astre
1976 - 1980 Pontiac Bonneville
1975 Pontiac Firebird Base
1975 Pontiac Firebird Esprit
1969 - 1974 GMC C15/C1500 Pickup
1969 - 1974 GMC C15/C1500 Suburban
1968 - 1974 GMC C25/C2500 Pickup
1968 - 1974 GMC C25/C2500 Suburban
1969 - 1974 GMC C35/C3500 Pickup
1969 - 1974 GMC G15/G1500 Van
1969 - 1974 GMC G25/G2500 Van
1970 - 1981 GMC Jimmy
1969 - 1974 GMC K15/K1500 Pickup
1969 - 1974 GMC K15/K1500 Suburban
1969 - 1974 GMC K25/K2500 Pickup
1969 - 1974 GMC K25/K2500 Suburban
1969 - 1974 GMC K35/K3500 Pickup
1973 GMC P15/P1500 Van
1973 GMC P25/P2500 Van
1973 GMC P35/P3500 Van
1968 - 1970 Oldsmobile 442
1968 - 1972 Oldsmobile F85
1969 - 1971 Chevrolet Kingswood Base
1971 Chevrolet Kingswood Estate
1972 Chevrolet Kingswood
1973 - 1974 Chevrolet Malibu Base
1970 - 1978 Chevrolet Nova
1969 - 1972 Chevrolet Townsman
1971 - 1973 Chevrolet Vega Base
1981 GMC G3500 Rally Custom
1981 GMC G3500 Magnavan
1981 GMC G3500 Rally Camper Special
1981 GMC G3500 Vandura Special
1975 - 1978 GMC K15
1979 - 1981 GMC K1500
1975 - 1978 GMC K15 Suburban
1975 - 1980 Chevrolet P10

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
Manual Control Partial
Product Type Automatic Transmission Valve Body Kit
Warning California Proposition 65
Shipping Notes
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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]
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SKU: 59587189463

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4.3 ★★★★★
Based on 22 reviews
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Product Reviews
K
Verified Purchase
karine
Pawtucket, US
★★★★★ 5
Works
Size: 3 Panel-102'', Color: Beige, Size: 3 Panel-102'', Color: Beige
It’s beige and not white. Once install - hard to disinstall. Need a drill to put it together
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
R
Verified Purchase
ralversity
West Palm Beach, US
★★★★★ 3
Does the job, but assembling by yourself is a nightmare
Size: 4 Panel-88'', Color: Black
Does it do the job? Yes, although as others said there are small gaps but it's not a huge deal. The price is also good. But the reason I'm giving it a 3/5 is simply because the assembly for this was a complete nightmare. I honestly don't think I would recommend this to anyone unless they have another person to help them assemble it, because doing it by myself was terrible. I don't think I'd buy this again, I think I'd opt to just spend a bit more money and save myself the trouble personally.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
T
Verified Purchase
Talagand
Charlottesville, US
★★★★★ 4
Reasonably adequate room divider
Size: 4 Panel-88'', Color: Beige
I'm reviewing this as I assemble it. Couple things: 1. I didn't expect as much assembly. I've ordered dividers before and they more-or-less came as one unit. Sometimes the panels needed screwing together. These require complete assembly and come largely as three rods: two make up vertical columns and snap together. Another one (called part "C") makes the horizontal columns and you have two of these per panel (one attaches to part "A" and the other part "B"). These parts are metal with a plastic shim. Using the wood screws to attach to part "C" is a real pain in the neck. There's not much holding the panel in place so it's a little tricky. One tactic I've found while I'm assembling that works for the initial connections from parts A and B to their respective "C" rods is to hold the screw in place with a screw driver and then rotating the rod around the screw. This will do a number on your hands if you aren't wearing gloves. This obviously doesn't work when completing the connection. Using a driller driver on this is really near impossible because there isn't anything you can use to secure it in place. You can use it on the first panel, but as it gets longer, it becomes increasingly difficult and because it isn't wood, it's really tight. I considered drilling larger pilot holes but since there are only 4x4=16 screws I need to screw in, I just decided to use my screw driver to complete it. 2. Also related to assembly. When completing the panels (attaching parts "A" and "B" to parts "C" that have the cloth cover on it), you have to be careful that when you tighten that side that it isn't loosening the other side. Because the pilot holes are so tight, you can end up rotating the rod, which rotates it in the same direction as looser on the original side. Having someone hold the "C" rod in place while you screw it in is probably the easiest approach. I didn't have a 2nd person, so I just had to keep flipping back and forth and tightening both sides as I screwed it in. Not the worlds biggest deal, but annoying nonetheless. 3. The way the instructions are written, they seem to suggest building this thing progressively; that is, you do panel 1, then 2, connect them together, then do 3 and connect it, etc. I took a different route that I suspect saved me quite a bit of trouble, and I assembled all four panels first and THEN connected everything together. 4. For the love of God make sure you check that the plastic tip is on the same side for every panel. Otherwise, you have to take one side apart again and reverse it. On the bright side, if this happens, you've essentially bored out the pilot holes to be the correct size... which is having me question if I shouldn't have just bored them out to the appropriate width in the first place. 5. Attaching all of the panels together is also an enormous pain in the ass unless you happen to have an 88" long elevated surface. Attaching the legs either requires you to elevate one side, which will invariably twist the inexplicably cheap material in the bottom connectors... or you can attach them sideways... or you can put this thing upright, having two people hold the panels in place while you use the allen wrench to tighten the bolts on the underside. None of those are particularly great options. NOW on to the utility itself. 1. The panels do let some light through (I didn't believe their advertising, and that was one of the reasons that I bought beige, is that I wanted it to not be too dark). They aren't transparent though, so it isn't that far off from their description. They functionally work great, and keep the mess of wires hidden and when I'm sitting at my desk, actually reflect quite a bit of light into my office. Great! 2. My wife has described these as "the most hideous piece of furniture ever conceived of by man." So it does not have spouse approval factor. Granted, she will seldom be in my office area, so that isn't the end of the world. 3. These are really hard to align in a way that doesn't look a little tacky. There are some plastic connectors but they don't do a bang up job of keeping these in place. Each panel is slightly tilted and it's... quite obvious. I may at some point make my own improvements to these to help make them more level. It's not a particularly expensive product so I wasn't expecting much so it's fine and I'm not going to ding them on the rating because of it. All said, would I buy this product again? Probably not. It's assembly was ~90 minutes which is about 75 minutes longer than I was anticipating spending on this (not including the 5 minute writeup that I'm doing here). But am I going to return it? Also no, if for no other reason I'd be just as annoyed taking it apart and putting it in the original box to return it.
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Reviewed in the United States on October 31, 2023
B
Verified Purchase
Barbara McCloud
Battle Creek, US
★★★★★ 5
Nice and strong
Color: Black, Size: Wheel-6 Panel
Nice and strong, tedious, putting together, but very good quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 17, 2026
A
Verified Purchase
Al Tompkins
New York, US
★★★★★ 5
if you are going to be moving them a lot, buy something more sturdy.
Color: Black, Size: Wheel-6 Panel
I use these at our churchc. They are pretty good, not terribly study and the screw that hold the faabric have pulled out in a couple of places. But they wqould work especially well if you were not constantly moving them as we do. They are a bit of a pain to assemble.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 20, 2026

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