Performance upgrades for a 48RE... I need a good manual

[GOT-Torque]

I will be installing some upgraded parts into my 48RE soon and was wondering if anyone knows where I can find a good transmission manual...

Can anybody recommend a good manual that worked for them?

Thanks!

 

[farmboysdiesel]

ATSG makes a good one.

 

[Schoust]

I used the factory manual and it worked out fine every detail you will ever need....

 

[zstroken]

Factory service manual.

 

[GOT-Torque]

Where can I find a factory service manual for a good price? Engine/trans are from an early 04 truck. Thanks