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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 1993-1997

4L60E Pro Street 1993-1997
4L60E Pro Street  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. This pump now will keep the pressure & volume up 7,800 rpm.

Reverse Input Drum: A new reverse/input drum, along with the Turbulator low-drag steels, and Borg Warner clutches. The Belville spring is replaced with a waved spring, this eliminates the Belville spring from eating the reverse/input drum.

Input Drum: The stock input drum starts getting into trouble at around 575 to 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. New latest design 29 element input sprag, Borg Warner clutches for the overrun and late design Borg Warner forward clutch assemblies, 9 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 springs and 3-4 helper springs (the Trans-Go springs prevent the 3-4 clutches from getting into trouble, due to centrifugal clutch apply. Good for up to 7,800 rpm, stock setup starts getting into trouble at around 5,000 rpm), clearance for the 3-4 clutch pack .020" -.035". A "dual feed" input shaft capsule is installed for a better torque converter clutch lockup on 1993 and 1994 transmissions.

Rear Drive Section: Hand picked input sun gear, forward planet with batwing thrust washers, input internal gear, reaction carrier shaft with "roller" bearing instead of metal thrust washer, a new GM heat treated sun shell, the latest design Borg Warner low/reverse roller 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, Teflon extension housing bushing, and a Vamac rear seal.

2-4 Band & 2-4 Servo: Borg Warner Hi-Energy 2-4 band, new Corvette 2nd gear apply servo used in conjunction with the latest design Viton seals. An additional spring is added to the cushion side of the servo to help provide a smoother 1-2 apply at light throttle while still allowing a firm WOT shift.

Valve Body: We use the "Modified" Trans-Go Performance Shift kit in conjunction with the large boost valve, Corvette servo, and the 9 clutch 3-4 pack. (This setup has proven to be very reliable). We work with the accumulators to give the best possible part throttle shifts, and progressively firmer shifts with more throttle opening. A Sealed Power (zero-leak) filter is used.

Details
 
Part Number 4L60EPS93-97
Price: $2,495.00

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