Featured Products

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Browse Transtar's featured transmission-related products.

Check out this month's Featured Products Flipbook

Ford 4F50N Sun Drive, 2001-UpFord 4F50N Final Drive Sun Gear, 29 teeth, 5.25" long, for applications 2001-up. This aftermarket differential sun gear is a cost-effective substitute for the often-replaced OEM product.
Aisin Warner Shift Kit,This Shift Kit for the AW55-50SN reduces and prevents delay/bang drive engagement, 4-3 and 2-3 coast clunk, 2-3 and 3-4 cut loose, and TCC slip. Allows the builder to take apart and clean the linear solenoids.
Aisin Warner 450-43LE Cutback SleeveTranstar now carries the cutback valve sleeve for the AW 450-43LE transmission years 1998 and up. This sleeve only item (Superior Part No. K081) features an upgrade to hardened steel and requires no modification to the transmission.
Aisin Warner 450-43LE Cutback Valve & Sleeve KitTranstar now carries the cutback valve and sleeve kit for the AW 450-43LE transmission years 1998 and up. This Sonnax kit (94987-01K) addresses the issue of the engine stalling when the transmission is put into gear. This kit features upgraded materials and includes the valve, sleeve, end plug, spring, and one coiled spring pin. This kit is a direct replacement for the OEM product.
GM 4L80E Forward Clutch Drum w/ Ring GearTranstar now carries the new Aftermarket GM 4L80E Forward Clutch Drum with Ring Gear for years 1997 and up. This drum is the molded piston type and is a direct replacement for the OEM product (24234155).
Aisin Warner 55-50 Lockup Relay Control Valve & SleeveTranstar now carries the Lockup Relay Control Valve & Sleeve for the Aisin Warner 55-50 transmission. This item from Sonnax Industries, Inc. (59947-01K) is an upgraded aftermarket item that addresses the common occurrences of TCC Apply/Release problems, reduced torque converter pressure, overheated fluid, and bushing and solenoid failure due to wear. This drop-in replacement product features upgraded materials and tight tolerances to help prevent a reoccurrence of the original problems.
Aisin Warner 55-50 Lockup Control Valve & SleeveTranstar now carries the Lockup Control Valve & Sleeve for the Aisin Warner 55-50 transmission. This item from Sonnax Industries, Inc. (59947-03K) is an upgraded aftermarket item that addresses the common occurrences of TCC Apply/Release problems, torque converter failure codes, and burned out torque converters due to wear of the sleeve bore. This drop-in replacement product features upgraded materials and tight tolerances to help prevent a reoccurrence of the original problems.
Aisin Warner 55-50 Pressure Regulator Boost Valve & SleeveTranstar now carries the Pressure Regulator Boost Valve & Sleeve for the Aisin Warner 55-50 transmission. This item from Sonnax Industries, Inc. (59947-07K) is an upgraded aftermarket item that addresses the common occurrences of delayed engagement, harsh/soft upshifts, and erratic reverse pressure due to wear. This drop-in replacement product features upgraded materials and tight tolerances to help prevent a reoccurrence of the original problems.
Aisin Warner 55-50 Solenoid Modulator Valve Capsule KitTranstar now carries the Solenoid Modulator Valve Capsule Kit for the Aisin Warner 55-50 transmission. This item from Sonnax Industries, Inc. (59947-09K) is an upgraded aftermarket item that addresses the common occurrence of lost of 3rd, 4th, or 5th gear, no TCC apply, low line pressure, delayed forward, 2-3 flare upshifts, and a 5th gear only condition due to wear in the valve bore. This drop-in replacement product includes the solenoid modulator valve, sleeve, spring, and 2 orifice plugs.
Aisin Warner 55-50 Oversized Pressure Regulator & Boost Valve KitTranstar now carries the Oversized Pressure Regulator & Boost Valve Kit for the Aisin Warner 55-50 transmission. This item from Sonnax Industries, Inc. (59947-12K) is an upgraded aftermarket item that addresses the common occurrence of wear at the pressure regulator valve bore which results in harsh or soft shifts, delayed engagements, torque converter apply/release problems, and late shifts. This upgraded item features enhanced materials and includes the pressure regulator valve & sleeve and the boost valve & sleeve. Note that this is NOT a drop-in replacement item. To install the S89741PK, the use of Transtar Part No. T-F-59947-TL12 (Sonnax Part No. F-59947-TL12) tool kit is required and includes a reamer, guide pin, and reamer jig. Also required is Transtar Part No. T-VB-FIX which is the valve body fixture.

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