My 4L60E has pretty much crapped out on my 99 LS1. I know I want a TH-400 with a Reverse Manual Valve Body and a Transbrake, but I have NO CLUE what Im looking at. Right now I dont have the money to spend on a brand new transmission with all the goodies so a used TH-400 is going to be my best bet. I know I need a different shifter (any seems to be fine), a different length driveshaft (wont be a problem, a local shop here can handle that for me), a different crossmember (I will order the BMR one). Other than that I have no clue what Im looking at.

Will ANY TH-400 work? I know that I will not use all of the bolts to connect the tranny to the motor.
Will any TH-400 converter work with the LS1 motor?
What size tailshaft will work?
Ive read some things about different sized input and output shafts and upgraded sprags and shims here and there. This is the main part I just dont understand? Can anyone shed some light on what I need to be looking for in a used TH-400?

Thanks!
Josh

 

http://www.transmissioncenter.net/highperflist.htm

Install a Turbo 400 on a LS1 Motor

# LS1- 400. " Master Blaster " This converter is made for a 400 transmission to mount on a LS1 type motor and flywheel. No spacer or adapter needed. This is a 9 1/2 inch converter rated at 1200 horse power. The 22 element one-way sprag is rated up to 1100 foot pounds of torque. Can be ordered in stall speeds of 2500 to 5500 RPM. The Ultimate Top of the Line Racing Converter. Lower 60 foot times and improved quarter mile times, an average of 1/2 second reduction! Cost $795.00



#61. Crossmember fits 1993 - 2002 F-Body Camaros and Firebirds. Replace your 4L60E transmission in a Camaro or Firebird with a 400 transmission. Fits LS1 type motor, moves the crossmember to the correct position for the 400 transmission mount (4 inch tail housing). Cost $66.00

#61X. Spacer to raise the 400 transmission to the correct height. Cost $37.00



#62. Torque Arm for the 4L60E to 400 Raptor conversion. Fits 1993 to 2002 F-Body. Attaches to the rear axle and controls rear end torque during acceleration, transferring this energy into the tires, increasing straight line traction. No fabrication, welding or drilling required - 100% bolt-in installation! Powder coated. Left click to enlarge. Cost $495.00





#63. Steel Nitrous drive shaft for the 4L60E to 400 Raptor conversion. Fits 1998 to 2002 F-Body. Cost $425.00.



#64. Speed Sensor and Rotor (speedometer VSS) for the 4L60E to 400 Raptor conversion. Cost $186.00 for both. Speed sensor $116.00. Rotor $70.00.













#65. Cast aluminum bottom converter cover for the 4L60E to 400 Raptor conversion. Must be used with a 4WD TH400 case. Cost $53.00

#66. Lokar firewall mount dip stick for 4L60E to 400 Raptor conversion. $75.00









#40. 400, 2WD universal transmission mount. Effectively controls transmission torque better than stock units, especially in high-performance applications. Soft enough to absorb vibrations for street use yet rugged enough for racing. Commonly used in stock car and drag racing. Helps control torque on heavy horsepower cars. Maintains proper drive shaft angle. Made of HYPER-FLEX performance polyurethane. Cost $29.00


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#67. The Total Package to convert your 1998 to 2002 F-Body from the 4L60E transmission to the 400 Raptor transmission. You get the 400 Raptor transmission with the LS1 bell housing bolt pattern, the Master Blaster torque converter, cross member with spacer, adjustable Torque Arm with drive shaft loop, steel Nitrous drive shaft, speed sensor, converter cover, Lokar dip stick and transmission mount. Cost $3810.00. Installed Turn-Key job $4272.00




The Finished Product, left click to enlarge. This 1998 Firebird belongs to David Mitchell of Magnolia Arkansas. We installed a 400 Raptor transmission behind his LS1 motor on 3-7-03.