Hi, i'm new here, I'm building a 4l80e 1998 for my chevy nova 1974 and i found so much info here. I'm trying to rollerised the forward hub now...any help would be appreciate...i just check the hub end play and i got 0.018" . I will check the plastic trust washer tickness tonight and begin calculations.

 

 

The front end play should always be greater than the rear end play.

I aim for 0.0020" to 0.0040" more front end play than rear.

That being said, starting with a goal of 0.0120" to 0.0160" rear end play... try to add between 0.0020" and 0.0040" more than what was first obtained from the rear.

Besides front and rear end play, there are also plant to planet (reaction carrier) end play considerations and forward hub to direct drum end play considerations.

Planet to planet (reaction carrier) end play should be close to 0.0100" and can be adjusted with replacement 4 tang thrust washers from Sonnax...
Or by machining one of the planets for a th350 pump torrington bearing and shims.

Forward hub to direct drum end play should also be close to 0.0100" and can be adjusted with replacement selective thrust washers from Sonnax...
Or by using a torrington bearing and shims on the forward hub.
I believe this was what you were working on...

 

i have rollerised the rear case output (whit bearing kit #224400 from TCI)and i have 0.008" end play, i have 0.010" and less at the reaction carrier whit the original 4 tang rear trust washer. I have a 1F1Z-7F404-AA trust bearing from rockauto for the forward hub.
So my plastic washer is 0.061" thick, 0.018" end play, and my new trust bearing is 0.141". 0.141-0.061-0.018=0.062. 0.062+0.010= 0.072" to be machined from my forward hub to get 0.010" of endplay...is it ok ? Should it be more tight whit a torrington bearing?
thank a lot .

 

The Math is correct.

That sounds like it should be perfect.

Let me know what your finished front end play is, after you assemble.

 

Waiting for the forward to be machine soon... I have put high rate return spring in the intermediate because it was clearly weak...but do i really need to put high rate return spring in the direct clutch and where to buy it? Ck performance doesn't reply to my emails and the one they have is for a th400.. is it the same? I have jake recal kit... thanks

 

Perfect!
You should be using 12 of those springs on an aluminum piston for the intermediate clutch. Also use a stock th400 intermediate clutch spring retainer and snap ring for your intermediate clutch.
The direct clutch should also use high rate return springs and yes they can be used the same in a th400 transmission . You should also use a th400 direct piston, and spring retainer for your direct clutch.
Most importantly, dual feeding the direct clutch is the greatest improvement that can be made for the direct clutch.

If CK performance is not answering e-mail, Then I would try calling them. Call and ask for Michelle: 631-218-1989. Michelle usually handles as much of the customer interaction as possible.

If no luck, than call Jake's performance for the parts you need. I don't usually send people there but, i know he will have the parts you are looking for. Call 877-433-5099.

CK performance has always been good to me, but they are a very small operation. Just two people, Chris and Michelle, no other employees.

I am not going to defend Chris if he doesn't reply to e-mail or doesn't answer the phone. He can get excited at times and come off in the wrong way with customers. However that is usually Michelle's job and she is great at it.
Chris manufactures and sells great products. He is an intelligent man, but he can have a short fuse and is not the best person to be dealing with customers.

And I am saying this as a guy that likes Chris and respects him very much... however his attitude has caused me not to speak with him for over two years now. He told me not to come back to his shop and I never have... Mind you, I still send business to his company and Michelle ALL THE TIME! He probably has no idea that I still support him... O Well!

 

Forward hub is machined and i got 0.010" endplay. Finally get a reply from CK and i bought the th400 direct high rate return spring. Th400 Intermediate spring and retainer installed.. HD intermediate snap ring ...
i install the sonnax lb1 line pressure booster but jake instructions tell to not install the stiffer spring under 1000hp/tq... I'll ask them more info about that...
the pump gear as some wear.. seem loose and get 0.005" clearance on od outer gear... whit a new gear it really tight and get a tight 0.0015 of clearance. I think I'll go whit the 0.005...

 

Got the direct high rate return spring install. Quickly assembled part to see the input shaft end play . I got 0.006" . It's too tight because of the rear end play is 0.008"?. Should go to at least 0.010" input shaft end play? Gonna work on pump shim next...

 

rear endplay sounds tight at .008 but it'll be fine if rollerized
Front endplay should be 5-10 thou more than rear

 

I have rollerised the output and the forward hub...

 

if you have rear endplay at .008, that's within spec. If you have then open up front endplay, I would open it to .011 ish.

Don't want front to be tighter than rear

 

I recheck my input shaft end play and i was wrong... i pull it more hard and i got 0.045" whit a 0.090" pump selective washer. Which washer would you choose guys?
Thanks

 

I'd use whichever washer got me to .011

 

The 0.006 measurement i first did was the input shaft snap ring witch i should remove from the front end play right? So it bring me to 0.039 front end play whit a 0.089"pump washer.
If i order a 0.107" washer it will bring me to 0.021" . I only found those washer on vista transmission part... obviously i need a 0.117" washer but i don't found it... do you know other option then the 0.107" washer? Whit a 0.123" it will be too tight 0.005"...

Thanks everybody..

 

I should receive my 0.107" pump shim soon. I'll be back whit the input end play. It should be close to 0.020" vs 0.008" rear end play

 

 

I just put a 0.123" pump selective washer and was not sure of my dial indicator reading. So i try jack up the output shaft (whit trans vertical) and it affect the input shaft . After jacking i was able to read a 0.010" input shaft endplay...

Whit 0.008" output endplay, it seem I'm on the limite if it right to check input endplay by jacking the output...

Is it possibly sand a pump selective washer to get more play?