^ Yes, LS3 is an aluminum block. Dual springs good to .600", supposedly engine dyno'd at 576 HP at crank. I will post the TMS dyno sheet when I receive it.

As delivered today...

 

He is an abusive idiot, This is in a Heavy crew cab pick-up, Don't know HP/TQ but....It runs HARD with that Magnuson TVS Blower And that is his story about it burning up that many times, He may have just been bashing the trans shop that he used before me?


I currently work at a Performance shop & specialize in TH350's, TH400's, 200-4R's, 700R4's, 4L60E's, & 4L80E's. And recently got into 4T60E/4T65E FWD behind boosted 3.8L & LS4 5.3L.
I worked for years in Transmission shops & got tired of the corner cutting BS just to get the unit out of warranty. Shop owner concerned about money, Customer concerned about money...& me stuck in the middle.


If your current trans does go down, Please consider a 4L80E....And don't play "what will break next" on your Dime....After you buy a $700 Drum.


I cant give much advice on your trans because I don't know what has been done past 5-pinion planets & a Sonnax Overrun Valve?

 

I like your kind of repair guy -- need more of your style around.

Looking over my TSI Racing trans related work receipts, assuming they listed everything parts-wise:

Initial blueprint rebuild Sep-2013:
Yank 3200 Stall torque converter
B&M 70264 Trans cooler, Redline D6 ATF fluid
Modified valve body for better shifts
Beast sunshell

Rebuild 1 Jul-2014:
Upgrade to 4L75E components
Master overhaul kit w/Alto clutches
Trans Oil filter
8681518 29 Element input spray assembly
8654200 Carrier
24212177 Carrier
24210960 H.T. Shaft & Hub w/bearing
Delco H.D. Low Sprag
Alto Red power-band 2-4

Rebuild 2 Apr-2015:
15D-171 EPC Solenoid & 5D-152A Man. S.
Master overhaul kit w/ clutches, rings, seals, filter & bushings
Wide Alto Carbon racing band 2-4
92800 29 element input sprag
92801 Low-rev sprag
13 Vane rotor & vane kit
92874 Forward clutch apply piston
S747415-1HD H.D. 2-3 valve

 

there is a 6 pinion planet made for 4l60's

 

that should take some fast tracks,mines 600 lift too I just don't have the aluminum block heads ,I need to get a better top end with time ,could bring it over 500hp,how much lighter is that over a steel one the engine that is

 

It's been rebuilt every year for 3 years? What happened?

 

2013 Was the first rebuild. I had two straight 4L60E swaps prior to that covered under extended warranty at Chevy service centers. Ext. warranty dropped me for the 2013 one when they discovered my LTs and diverter, etc.

2014 I lost a couple gears -- forget which now -- will have to go back and dig up specifics.

Well 2015 was due to a slipping on 2-3 shift, which my trans guy thinks might be due to the trans shifting too early under part throttle. Speed Inc. then made a tune change to the shift points after rebuild.

 

Who makes that? I only heard of the 5 ala:

http://www.genuinegmparts.com/pdf/po...E%20Family.pdf

 

are you talking front or back, patc makes the 6 pinion front planet gear.

 

OK, The parts list looks OK, Didn't see what SunShell they used?


So, You have had it rebuilt 5 times.....Hopefully it's good now & you will not have to worry.


A little bit about 4L60E Planetaries, (Not trying to step on toes here!)

4-pinion Planets are plenty strong enough! They will handle what the rest of the trans will & more. 99% of Planet failures are a result of Poor Lubrication that has been an issue since 1982 when the 700R4 came out. GM has tried several stop-gap measures to correct this but none have been successful.


The 5-pinion is stronger, Their main focus with this update was for 1/2 ton Trucks with 6.0L's. Even though all LS2 cars got 5-pinion planets too.


All 6-Pinion Input(Front) Planets are for running Different 1st & 2nd gear ratios, 2.84 1st & 1.55 2nd V.S. 3.06 1st & 1.63 2nd. To make this possible the Input Sun Gear diameter had to be Increased, Therefore the Pinion gears had to be made smaller.....To add strength back in the planet...6 Pinion gears are used.


Sonnax also makes a similar Planet to PATC's, But can be rebuilt with hand tools at home, 2.84 Ratio Input Carrier Kit - 77284-K - Sonnax