1000+ HP 4L60E Build Notes from a Broken Mind

(This applies to the entire 4L60E Family: 60E, 65E, 70E, 75E)

I am a Former Sole Proprietor that has closed up Shop a bit prematurely due to Health issues (Brain Aneurysms and multiple sessions of Strokes)...
And releasing Build Notes so that My life's Work is not a complete waste.


Starting from Front to Back and with Parts First, then Modifications.
These will be Parts that are intended to prolong the Life of the Transmission at said Power Levels.
Some Parts are Required, and some Parts are just for maximum Life Expectancy.
(Some Parts and Modifications are for IDIOTS, whom can not be trusted to either Install and/ or Operate the Transmission as I have Instructed to do so!)

PARTS:

-Complete Front Pump Half Assembly: GM #24243749



-Replace Bushing: (Seal will be needed) Durabond Solid Black PTFE Part # , National Seal Part # .
-Replace Rotor and Plastic Vane Guide: Billet Steel 7-Vane Rotor Part # , GM Vane Guide Part # .
-Replace Rings: TransGo Heat-Treated/ Hardened Steel Rings Part # .
-Replace Slide Springs and add Spacer: TransGo High RPM Single Outer Spring Part # , TransGo Low RPM Inner Spring (ONLY) Part # , Sonnax Spacer Part # .


-Complete Rear Pump Half Assembly: GM #24236486




(ONLY GM Version with Heat-Treated/ Hardened Stator Support Tube)

-Replace Front Bushing: (From THM350) Durabond Solid Black PTFE Part # .
-Replace Rear Bushing: Sonnax Wide PTFE Part # .
-Replace Pressure Regulator Spring Set: TransGo Part # .
-Replace Boost Valve and Sleeve Assembly: TransGo 0.5000" Part # .

Special Notes:
-Type of Pump to Case Seal and Part Numbers: Square-Cut Seal GM Part # , Compression Seal GM Part # .
-Use of ISS or Dummy-Plug and Part Numbers: ISS GM Part # , Dummy-Plug GM Part # (Included with Rear Pump Half).
-Turbine-Shaft with Reluctor: Sonnax Billet Part # .
-Green Bearing Retaining-Compound: Permatex Part # .

 

For tranny expert dummies like me .....many thanks to your contributions in educating us wanna be experts

I know all to well about health issues ....mine have slowed me down considerably ....my projects have dragged on for to long as they take a back seat to doctors and recovery.....I will have to live to a 100 to finish all my projects as I refuse to leave them to my kids to finish

If I ever win the lottery....we need to talk about some business projects

 

Thanks @vorteciroc for your many contributions. I am uploading the Dura-Bond 4L60E bushing page. The TK-23HP kit has all the black coated bushings in it. They also include all the wide bushings where applicable in it, like both wide stator & wide rear sun gear. I have used it many times, the only thing I wish is that they would put 2 pump bushings in it. I like the wider pump bushing in place of the standard rear drum bushing.

You can download the whole catalog at. https://www.dura-bondbearing.com/res...log-downloads/

 

Going to make this one a sticky. Great info from a great guy.

 

hey man I don’t know your first name or last, but I’m definitely familiar with your screen name here. I hope everything is good with you. I just wanted to say even though I’ve never engaged a conversation with you I can guarantee that your contributions here are not a waste I’ve learned countless things from you. undeniably you know what you’re talking about. I’m sorry your having health problems getting old sucks. Thanks 🙏

 

Am I the only one who hates the durabond pump bushing? Yuck, in my opinion, its junk and wears out too quickly. The factory teflon coated bushing is far superior and lasts way long while being slicker feeling.

-just an amateur



lol

 

Am I missing something here? There is no part numbers following GM Part #. I really need all those part numbers because I had a 4L70E rebuilt by a guy that has rebuilt transmissions for me before and have had no problems. But after flooring the gas 3 times it blew up on me. Also, would anyone have a ballpark cost for this build? Many have told me don't use the 4L70E but, go to a 4L80E. I bought a 3.5" aluminum drive shaft and a Circle D torque converter for the 4L70 which would be useless for the 4L80. I also have a TH400 w/a Gear Vendors O/D. That would involve changing the trans mount, rebuilding the TH400 and purchasing another converter, not to mention not having a lockup and adapting that to an LS2. I really need some good advice on this, it will be GREATLY APPRECIATED!