Hi, i have a 2005 LS1 which is going into a 1980 C3 corvette Auto

Engine will have basic upgrades like ls7 lifters, ls2 lifter tray, ls2 timing chain, melling oil pump, straub trunnion kit, w6store hot cam 218/227 .600/.600 112+2 and PAC 1219 springs. Will have free flowing headers and straight through dual 2.5" exhausts. What ever power that will get i want the trans built for.

I have read and read and watched videos on what needs to be changed in the 4l60e but my list is incomplete ... Are there any threads on what parts are needed for each power level and what is 100% needed Vs optional upgrades ?

Here is my list so far
- Beast Sun Shell Kit
- Transgo reprogramming kit 4l60e OR Superior PERFORMANCE STREET K4L60-E Shift Correction Package (not sure which to go with????)
- Sonnax Rear Stator Support Bushing 77002BT-01
- Corvette 2nd Hear Servo
- Borg Warner Hi-Energy 2-4 carbon band 27363BW (i read Kevlar are not good)
- New Reverse input drum
- Sonnax pressure regulator spring 77917-10
- Sonnax 4L60E Boost Valve and Spring Kit .490 77898e-3k
- OVERHAUL GASKET & SEAL KIT W/MOLDED RUBBER PISTONS A74960EK
- Raybestos Z-Pak 3-4 Clutches RZP-001
- Torlon check *****

What other parts do i NEED and what else is optional. Please provide part numbers if possible and what the part is for.

Optional ?
anti - clunk spring replace it with a case saver
Pinless Accumulator Piston Kit 77998-03K (dont even recall why this is needed)...
5 pinion planet assemblies front and rear (for what power and driving is this needed?) I have read on hotrod.com
"Upgrading to the 4L65E is advisable in towing applications and where horsepower numbers are up to 500. Cars making over that number, there is a front planetary upgrade as well. Under 500, upgrade the rear planetary only" *Now is the rear planetary the one where you need a spring compressor to get to or is that the front ?

Thanks you everyone's help

 

One thing that confuses me is steels and clutches ..
If i get the Raybestos 3-4 clutch kit is that the same as ALTO RED EAGLE FRICTIONS / KOLENE STEELS A74100CPPK

According to http://www.hotrod.com/articles/ccrp-...on-conversion/
"We cherry-picked the clutch kit, using the Z-pack for the 3-4 clutches. These are specifically designed to not bow and to have superior holding power. The red oxide clutches have better hold for 1-2."

 

Do not use the Z-Pak as is here. Go with the Borg Warner Hi-Energy clutches in the 3-4 setup. Use eight .080" clutches, three .080" steels, four .060" steels, one .125" flat pressure plate and a .062" snap ring. This should get you .020" - .035" clutch clearance here. Adjust the steel thickness if necessary to get the correct clutch clearance. You can use Kolene steels for the 3-4 clutch pack if you choose. Kolene steels are not necessary in the other clutch packs. The TransGo HD2 has the large .500" boost valve and pressure regulator spring in it. Do not use Alto anything here. Factory clutches are best. As long as your 4 pinion planets are fine use them. The case saver is only necessary when the lugs in the case are worn badly. Stay with the late factory sunshell, or the Sonnax Smart Shell. Use the TransGo No Yo Yo (Hi-rpm) steel rings and single front pump priming spring. This will keep the line pressure up at high rpm's (5,500 rpm and up). Depending on the diameter and stall of the torque converter will determine the hole sizes in the separator plate. If the transmission came out of a Camaro, Firebird or Corvette, it already has the Corvette servo. You only need to replace the reverse input drum if yours is dished or has a lot of heat marks, or other damage. Replace the low/reverse roller clutch and the input sprag. The inner race for the input sprag assembly must be near perfect shape, extremely smooth and flat. The accumulator pins and pistons must be replaced. You cannot use the pinless on the 2nd accumulator setup if you use the TransGo HD2. You can use the pinless at the forward accumulator and 4th accumulator if you want. Then the only pin you will need is the 2nd accumulator pin, and I have the hardened thin pin for this. To remove the planetaries will not require a clutch compressor tool, but removing the low reverse piston in the bottom of the case will, as it takes a special tool for this. To take apart the two drums, you will need a universal type of spring compressor. There are plenty of videos on you tube that should be of help if you do not know this unit.

 

^^^^^^^Good info here. As said do not use the Z-Pak use Borg Warner Hi-Energy clutches.

 

Thank you for your amazing help and insight ! What is wrong with the Z-Pak. Im happy to go with Borg Warner, im using their band anyway.

Ok so in total how much clutches, plates, steels do i need for the entire trans. Is there a kit that has all of those Borg Warner clutches as i only found one and it didnt have the exact ones you mentioned, only the .080 and .125

So you saying there is
8 clutches
7 steels
1 pressure plate
1 snap ring

Is that in total or just for 3-4 ? And the .080 and .060 steels can be upgraded to Kolene, but which ones are for the 3-4 and which ones are for 1-2 ?


So im better to use this than the Superior kit ? Any reason why?

So dont even bother with the rear planatery ? im aiming for 300rwkw
Can the rear one be changed without using spring compressor tool?

Any problem with the beast sunshell? doesnt the factory one have all the weakness the beast one corrects? The Sonnax is nice but too $ for my build. Double the price of Beast.

Are the No yo yo rings in the TransGo HD kit? Do they replace one of the sonnax parts i listed or something else i have not listed.
In Australia we dont have any of the Camaro, Firebird or Corvette 4l60e so im not sure if Holden use the Corvette servos..


Ok i will inspect the input drum then before ordering. And you say to buy all new roller clutch and input sprag regardless. Are they a common part that fail?

Do i even need to bother with pinless route then? Replace with sonnax or oem parts ?

Can i leave the low reverse piston then and not need to buy a spring tool ?

Thanks again for your help.
Let me know what other parts i need and a good kit for gaskets or what ever.

Hopes this helps other people.

 

Hoping i can get someone to clarify this ??

 

I should have added the bottom 3-4 oem apply plate to the 3-4 clutch setup. The TransGo HD2 Shift kit can be setup to give smooth part throttle shifts and quicker and firmer shifts with more throttle, and can be further modified to hold much more horsepower. I have not seen a Superior valve body kit in years, so I cannot say what their approach is. The Beast is heavy, not balanced, and cost more. GM solved the problem but took their time in this. The GM sunshell is heat treated, balanced, less money and is proven. I have not seen of heard of one break with everything that I have worked with since their introduction in the early 2000's. The rear planetary can be removed without a spring compressor. The TransGo No Yo Yo Hi-rpm setup is to keep the pressure up at hi rpm (5,500 rpm or more) and more pressure at a hot idle. They are a separate item from the Shift kit. The input sprag inner race should be thoroughly inspected and replaced if it is not perfect. The sprag itself should be replaced unless very low miles and it itself in excellent shape. The low/reverse roller clutch should be replaced with more than 50,000 miles. The Sonnax pinless for the forward accumulator is ok, and maybe the 4th accumulator. The aluminum piston and hardened pin has to be used with the TransGo HD2 as it is an over and under spring setup and will not work with a pinless setup here. It is always best to remove the low/reverse piston and inspect the seal area closely and replace the sealing rings. Take the case to a transmission shop and have them remove the L/R piston. It can be done in apx. 5 minutes if you do not want to buy the L/R tool.