4L80E Heavy Duty Starter Kit

4L80E Heavy Duty Starter Kit

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The 4L80E Heavy Duty Starter Kit, is the starting point for most high performance applications.

This is where it begins and you add billet as you go up!


The 4L80E Heavy Duty Starter Kit includes:

All gaskets and seals, seal aftermarket high performance blue bonded pistons




Borgwarner high energy forward, direct, and intermediate clutches, and tan borgs for the 4th and overrun clutches.  New steels, including those for setting the correct clearances.


Heavy Duty intermediate snapring 


Front and rear band


Sonnax no-walk case bushing, bearing to replace the two thrust washers and rollerize the rear gear train.

Sonnax wide front stator bushing, new front pump and center support bushing included also. 

Complete bearing kit

All sprags and roller clutches (roller clutches and sprags are year specific, you must notify us with year model when ordering)

Front pump gears 


New EPC and shift solenoids (shift solenoids are OEM)


Transgo Heavy Duty separator plate 


Sonnax LB1 boost valve and spring 



Will also include the Transgo Reamer and actuator valve setup.

 Use the Reamer and send it back, in working condition, for a $50 refund.