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1. 4L60E Heavy Duty 1993-1997
2. LS1/4L60E Pro Street 1998&Up
3. LS1/4L60E Heavy Duty 1998 & Up
4. 4L60E Street/Strip 1993-1997
5. 4L60E Pro Street 1993-1997


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Pro-Built Automatics :: GM Transmissions :: General Motors :: 4L60E :: 4L60E Pro Street Elite 1993-1997

4L60E Pro Street Elite 1993-1997
4L60E Pro Street Elite 1993-1997 
This is a one piece case/bell housing assembly. If you have the bolt-on bell housing, please specify.

Starting at the "Front Pump", new (late design) seal, Teflon bushing, 10-vane rotor/slide assembly on 1993-1996 transmissions, and 13-vane rotor/slide assembly on 1997 and up transmissions. Trans-Go steel rings & priming spring, Trans-Go HD pressure regulator spring and bumper spring, Trans-Go .532/.500 boost valve, both halves of pump machined flat with rotor and slide to pump clearance set at .002"- .003". A new stator support is installed with extra wide bushings installed at both ends. This pump now will keep the pressure & volume up 7,800 rpm.

Reverse Input Drum: New GM reverse/input drum, includes "drum saver" waved steel, along with the Turbulator low-drag steels, and Borg Warner clutches.

Input Drum: The stock input drum starts getting into trouble at around 575-600 HP with a 10" or smaller diameter torque converter. I add a steel sleeve and remachine the overrun piston to prevent splitting the drum open from high loads. A steel forward piston is machined to go along with the modified overrun piston. It will hold over 750FWHP, as long as a 10" or smaller diameter torque converter is used. The latest design extra wide 29 element input sprag, Borg Warner clutches for the overrun and late design Borg Warner forward clutch assembly that allows for a smooth neutral to drive engagement. 9 or 10 Borg Warner Hi-Energy clutches along with Kolene steels used in the 3-4 clutch pack, Trans-Go (Hi-Rev) heavy duty springs replace the OEM 3-4 and forward/overrun springs and 3-4 helper springs, (the Trans-Go springs prevent the 3-4 clutches from getting into trouble, due to centrifugal clutch apply up to 7,800 rpm, stock starts getting into trouble around 5,000 rpm), clearance for the 3-4 clutch pack .025 -.040. A "dual feed" input shaft capsule is installed for a better torque converter clutch lockup on 1993 and 1994 transmissions.

The Sonnax Heavy Duty 2-3 shift valve (modified overrun valve) will allow you to race in "D" without robbing any of the 2-3 shift oil on the 2-3 WOT shift. This valve keeps the overrun clutches on in the "1", "2" or "D" shifter position. Sonnax reverse abuse valve is added. Blocking the 3-2 control valve. There are other modifications to make 2-3 shift even better.

Rear Drive Section: Hand picked input sun gear, forward planet with batwing thrust washers, input internal gear, low/reverse support, reaction carrier shaft with "roller" bearing instead of metal thrust washer, a Sonnax Smart sun shell assembly, the latest design Borg Warner low/reverse roller (one way clutch assembly, Turbulator low-drag steels, Borg Warner clutches, hand picked rear planet, hand picked reaction sun gear, internal reaction gear, internal reaction gear support, a bronze rear case bushing, and a Teflon extension housing bushing and a Vamac three lip rear seal.

2-4 Band, 2nd and 4th gear Servos: Alto Carbon lined extra wide 2-4 band with re-inforced anchor pin area.

2nd apply servo: Sonnax 2nd gear apply servo used in conjunction with the latest design Viton seals.

4th apply servo: Sonnax "dual piston" 4th gear apply servo (40% more apply area than the stock 4th apply servo) with the latest design seals for extremely quick 3-4 WOT shifts.

Valve Body: I use the Trans-Go Performance (modified) Shift kit in conjunction with the large .500 main/.300 intermediate/reverse boost valve boost valve. New TransGo pre-drilled separator plate. The "A" or "B" accumulator assembly is used in the valve body, this allows for smooth part throttle shifts & firm WOT 1-2 shifts when using the Sonnax 2nd gear servo. 2-3 WOT shifts are slightly firmer with the Sonnax servo. Hardened corner separator plate saver is added for further durability.

2nd Accumulator: I use the PN24219937 second accumulator housing with matching springs and a new "hardened" accumulator pin (RC52), along with a modified 2nd accumulator piston, that will give the smoothest part throttle shifts and extremely quick 1-2 WOT shifts.

4th Accumulator: The Sonnax pinless accumulator piston with special seals. This gives the best WOT 3-4 shifts.

Forward Accumulator: The Sonnax pinless accumulator piston for maximum durability.

The Case: The 1993-1997 "single piece" (bell housing and case are one) transmission is used here for all of my builds, unless otherwise indicated

The output shaft is Cryoed for added durability.

Details
 
Part Number 4L60EPSE93-97
Price: $2,975.00

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