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Automatic Transmission Parts
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      ST300 Transmission Parts
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Deluxe Transmission Rebuild Kits
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Makco Distributing Kit Component Guide

Deluxe Kits (Super) - Includes: overhaul kit, friction clutch plates, standard steel plates, filter, band, modulator (if required), bushing kit (or popular bushings) & sometimes popular washers.

Master Kits (w/ Steels) - Includes: overhaul kit, friction clutch plates & standard steel plates.

Banner Kits (w/o Steels) - Includes: overhaul kit & friction clutch plates.

Overhaul Kits (no Clutches) - Includes: paper gaskets, O rings, lip seals, metal clad seals and sealing rings.


>>>>>Click here for Transmission Illustration<<<<<

ST300 Transmission Parts
Automatic Transmission Parts


Click here for important info on our
Transmission Rebuild Kits
Transmission kits Image Price    
274002 Overhaul Kit, ST300 1964-69,
…Basic overhaul kit includes, paper gaskets, O rings, lip seals, metal clad seals and sealing rings.
  $ 67.13  
274004 Banner kit, ST300 1964-69, Pontiac 2 speed
Includes: overhaul kit, friction clutch plates
  $ 124.97  
274006 Master kit, ST300 1964-69, Pontiac 2 speed
Includes: overhaul kit, friction clutch plates & standard steel plates
  $ 168.1  
Bushings Image Price    
44034 Bushing GM Pump *Most popular large
350 series, 400, PG, 425, 325 300 (Not for 200 or 700 series)
  $ 3.25  
44066 Bushing, Tail Housing (Babbitt)
250 / 350 / 700R4 / 4L60E Extension housing
BW1372, NP207, NP231, NP233, NP242, NP247, NP249 Bushing, Tail Housing (27 Spline)
BUSHING, Extension Housing, 1.630" OD, 1.0" Wide (Transmissions) NV1500, NV3500, Muncie M20, M21, M22, NP 833, Saginaw, SR4, RAD xxT10, Super T10, T150, T4, T5 Non World Class xxT56, T5 World Class
(Transfer case) BW 1372, BW 4472, Extension Housing (27 Spline)
NP 207, Extension Housing
NP 231, Extension Housing (27 Spline) (GM)
NP 233, Extension Housing (27 Spline)
NP 242, NP 247, NP 249 Extension Housing
Industry Ref # WT266-62
  $ 5.98  
274030 Bushing Kit, ST300
***NOTE: KIT DOES NOT CONTAIN CASE BUSHING DUE TO NLA.***
  $ 11.4  
Clutch plates Image Price    
44114 Friction, 350 series, Alum PG, Low / Reverse
.098, Also 300 2 speed 1964-69 …… Common brand - Borg Warner
  $ 5.81  
A44114HP Friction, PG / 350 series, Low / Reverse, High Performance
Red Eagle High performance, Great for Street & Strip use …… Common brand - ALTO
  $ 10.37  
114106 Friction, Powerglide / 300, High clutch drum, 62-73

  $ 7.49  
114126 Steel, Powerglide / 300, High clutch drum, 62-73
0.07
  $ 2.33  
114130 Steel, Powerglide, Reverse

  $ 5.03  
114139 Steel Module, Powerglide,
Standard set of steel plates
  $ 44.86  
114126BK Steel, Powerglide / 300, High clutch, .060
.060, Kolene, Thin plates for adding additional clutches
  $ 12.08  
114126C Steel, Powerglide / 300 High clutch, .070
.070, Kolene
  $ 7.63  
114130K Steel, Powerglide / 300, Reverse KOLENE *Out of stock
*Out of stock
  $ 9.01  
A114106APPK High Gear Powerpack, Powerglide, Friction & Steel kit
Powerpack, Install up to 8 friction and 8 steel plates in the High drum, Hi-Performance Red Eagle (.060) friction & (.060) Kolene steel plates.
  $ 293.45  
A114119HP Friction module, Powerglide / 300, High performance
High Performance Alto Red Eagle, Standard .098 thickness plates
  $ 220.94  
Filters Image Price    
274010 Filter, ST300

  $ 86.52  
Gaskets & O rings Image Price    
44371A O-Ring, GM / Ford / Chrysler Filler tube
Various years and models, Most popular O ring
$ 1.68  
274300 Gasket, ST300 Pan, OE type Cork gasket *Email for availability
*Email for availability
  $ 4.9  
274300F Gasket, ST300, Updated Fiber gasket *Email for availability
*Email for availability
  $ 15.65  
274310 Gasket, ST300, Front pump

  $ 3  
Metal Clad Seals Image Price    
44070 Seal, Front, Most GM large pump seals
400, 425, 350 series, Allum PG, 300, 325
$ 3.84  
44072 Seal, Linkage, Most GM except PG
400, 425, 350 series, 300, 325, 180, 4L80E, 200, 2004R, 2ML70
$ 1.69  
44074 Rear Seal w/o Boot, Flange Type, (2.38" OD)
AODE Seal, Rear (Red w/o Boot) Flanged
GM375 (small output shaft 400)
(Transmissions) Muncie M20, M21, M22, w/ (27 Spline Main Shaft)
Saginaw, T10, Super T10, T150, T18, T19
T4, T5 Non World Class, T5 World Class
(Transfer case) NP 205, NP 207, NP 208, NP 231, NP 241, NP 242, NP 247 NP 249
Rear Output Seal (2.385" x 1.430") (w/o Boot) Flanged
Industry Ref # 15041
$ 2.98  
44078A Seal, Spedo Inner seal WITH spring, GM / Chrysler
Inner seal, mainly used with Steel Shafted spedo gears
$ 2.89  
44078X Seal, Spedo Inner Seal, GM / Chrysler
Soft rubber type, uses retaining ring
$ 1.98  
Modulators Image Price    
44160R Modulator: (Z) 350 / 400 Single RED stripe adjustable
Most popular GM 350, 400, 425, 300
$ 13.97  
WE HAVE HELP FOR
TORQUE CONVERTER SHUDDER

Instant Shudder Fixx, 
A concentrated friction modifier formulated specifically for INSTANTLY eliminating torque converter lock-up shudder
Torque converters Image Price    
TC-GM1A Torque converter, 350 (Non Lock-Up)Super Turbine 300 (ST 300)
Diameter - 12.5”, Pilot - 1.703”, Mount - 3 Pads (Uses Only a Bolt), Splines - 30
Notes - Approx. Stall1400-1600
Buick, Pontiac, Olds. (HD Avail - GM1AHD)
1965-79 BPO (8 Cyl) Fixed Pitch Stator (TH300 Kickdown Solenoid on VB)
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 106.35  
TC-GM1 Torque converter, Super Turbine 300 (ST 300)
Diameter - 12.5”, Pilot - 1.703”, Mount - 3 Pads, Splines - 30
Notes - Variable Pitch Stator
1964-67 BPO (6 Cyl) Variable Pitch Stator (Solenoids on VB & on Pump)
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 184.12  
TC-GM4 Torque converter, Super Turbine 300 (ST 300)
Diameter - 12.5”, Pilot - 1.703”, Mount - 3 Pads, Splines - 30
Notes - Fixed Pitch Stator 1964-67 w/ Cooling Shroud, (Kickdown Solenoid on VB)
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 341.25  
TC-GM7 Torque converter, Super Turbine 300 (ST 300)
Diameter - 11.75”, Pilot - 1.703”, Mount - 3 Pads, 30
Notes - Fixed Pitch Stator
1969-79 Some Chevy (6 Cyl)Light Duty (Do Not Use for HD or Racing)
NOTICE: Converters do not qualify for free shipping! Some Converters may require an $80.00 core charge added to order. We will contact you if core charge is required on your converter.
$ 341.25  
Miscellaneous Items Image Price    
A44839 Transmission MAGNET, Square
Magnet fits in most pans
Traps fine metal shavings
Approx 1" L x 3/4" W
$ 3.04  
2000 Mount, GM RWD Universal transmission
Replaces most single stud or two hole mounts from 1955 to 1996.
3 bolt holes on mount. Use bolt in center hole to replace center stud mount.
Use 2 out side bolt holes to replace 2 bolt type mounts.
Wide notched base with elongated bolt holes will fit the narrow 350, 200, 700R4 and wide base 400 transmissions.
Will Not replace Offset type mounts
NEW # EM-5000
$ 10.26  
M463D GM Universal RWD dust cover
Fits 90% of GM RWD automatic transmissions from 1965-1995
Alt. part # K35803U
$ 19.47  
M463SA Ground strap, 14 inch long
Missing or bad ground straps can cause many problems.
A must check item on every rebuild.
$ 4.71  
M463SB Ground strap, 42 inch long
Missing or bad ground straps can cause many problems. A must check item on every rebuild
$ 9.78  
A44839B Transmission MAGNET, round
Round, thick (.250" +-) Magnet fits in most pans to trap fine metal shavings
$ 2.87  
M465SC Assemblee Goo, Green Transmission Assembly Lube
YOU NEED THIS ON EVERY REBUILD
ASSEMBLEE GOO is formulated for use as an assembly aid and lubricant for virtually any assembly application (including engines!). It provides lubrication and helps facilitate the assembly process, by holding components such as needle bearings and hydraulic seals in place. Simply apply to O-rings, seals, bearings, gaskets, sealing rings, bushings, thrust washers and much more.

Provides your choice of tack strength, firmer (GREEN) great for summer months and lighter tack (BLUE) great for winter months
No water/soapy residue to contaminate new automatic transmission fluid
Dyed green or blue to prevent misdiagnosing leaks
Will not melt at shop temperatures
Not harmful with prolonged skin contact
Will not clog filters
Dissolves quickly at operating temperatures
Proprietary green formula contains rust inhibitor
Compatible with all transmission fluids

*VARIOUS BRAND*
$ 9.14  
Tools Image Price    
T-0015 Tool, LIP Seal installer
Universal Transmission - Lip Seal Installer. Helps to roll most lip seals in without damage.
$ 34.92  
T-1079 Tool, Double pointed scribe, 9 1/4 long
Heat treated high carbon steel picks. Removes O rings, gaskets, springs and great for removing snap rings.
Straight and 90 degree angle points.
$ 24.49  
T-0280-C Tool, Bushing cutting chisel ***NOW AVAILABLE!!***
Cuts using the Curl Cut method. Also known as a Tailpipe cutter.
***NOW IN-STOCK! CALL TODAY TO GET YOURS!***
$ 51.75  


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Transmission Parts US - 755 Grand Blvd, Ste. B105-261 Miramar Beach, FL 32550
Phone / Text 1-850-419-1234 or 1-850-419-1818