Re: 4L60E Trans and Converters
 

I can tell you what we got from corbitt when we bought the caprice from him.... it wasn’t a 4L60E... it was a 200 and has been since at least 2009. Had it weigh 4100 and it’s fine. The 200 isn’t unreliable... I’m going 12.20s in P... be smart or you will be sorry. Right now you aren’t being smart

Re: 4L60E Trans and Converters
 

good advice here

Re: 4L60E Trans and Converters
 

Mike;
Right now the 4L60E is good enough for K/SA.
Reading a lot of feedback on all the transmission options.
Quite a bit of information and much conflicting.

Happy collecting parts and making upgrades.
For K/SA have to install Roll Bar, and next on the schedule.

Already have the new Cam and small fuel tank.
Will install the Trans, Drive Shaft and Rear together.

All this cost a hell of a lot money.
This is No Dime Rocket.

SS3011...
Thanks, get the 200-C not the OD version.
Going to need a new Trans Cross Member, so have to get that made.

Stock 8.5 Pinion Yoke should be good, unless there are suggestions.
Have to order a Driveshaft to mate with the Trans and use 1350 U-Joints.

The list goes on !

D

Re: 4L60E Trans and Converters
 

Dan you're right about one thing, all this does cost alot of money but doing it twice costs alot more. Do it right the first time with a 200 and you won't regret it. Mike has basically the same car and is running very impressive with his particular combo, I would take any and all of his advise seriously.

Re: 4L60E Trans and Converters
 

Thanks for the advice.
What I cannot do is snap my fingers and all gets done.
What has been learned there is a lot more than the trans.
Need a different Yoke, Universal joints, Driveshaft, bears, axles, housing reinforced with Ford Ends.

To run Stock still needs a Roll Bar and Belts, fuel cell.
I have the cam and heads with new valves and springs.
Should run near the K/SA index using my existing drive train.

Then there are the honey doos
That is the best I can do for now.

D

Re: 4L60E Trans and Converters
 

A 4L60E will never be competitive in K/SA. Besides the mass of the transmission, and mass of the converter, they simply have to much of an RPM drop between 1st and 2nd. Sure the 2.84 will help, but it's still a band aid.

The same problem occurs when you swap out the rear planet in a TH350 to make it a 2.75 first gear. When you do this, you lower first gear and second gear stays the same. So again, you are increasing the RPM drop between the 1-2 shift.

And then there is the converter issue. You will never get one built that will be competitive. NEVER! I've played with some of the best lockups made in my 200's. And the weight of the converter always negated the lock up advantage.

A TH200 is the only way to go. A 2.91 first gear upgrade would be perfect. Sure, a well built unit with a steel stator tube, billet drums and pistons, updated rear sprag, and roller bearing conversion can be pricey. But you don't need all that to start out.

Even a stock planet 2.75 ratio TH200 would be worth an easy 2 tenths over that 4L60E.

And when you are done, the TH200 will have resale value, the 4L60E will not.

Have you run your car in the 1/4 mile or just 1/8 mile? I can send you a time slip so you'll know where you need to be. While my stuff isn't stupid fast, I can hold my own.

Re: 4L60E Trans and Converters
 

Thanks for the feedback;
Beg to differ...
The Yank Locking Converter works fine.
It is heavy dampening the hit going into second without a hitch.

Best run of 12.68/105, 1/8th-8.02 ET., 60ft 1.61
A few more changes, Roll Bar, Fuel Cell enough to run the K/SA index.
This is good enough for now.

Going to a 200 means a complete expensive Engine and Drive Train upgrade to be competitive.
Winter project if there is time.

D

Re: 4L60E Trans and Converters
 

I’m no expert but does fuel cell and roll bar set up make the car .03 faster?? What happens when you are in very bad air?? 12.65 index for K....

Re: 4L60E Trans and Converters
 

Don't worry about it Mike..!
That is my challenge.
Roll Bar and Fuel Cell required for Stock anyway.

You know I am also rebuilding my 1969 Impala for Stock.
Should be moving along this Summer.

D

Re: 4L60E Trans and Converters
 

Fuel cell is not required in Stock. You probably should invest in a rule book.
Should also consider listening to some of the great advice given by guys that have “been there, done that”!
Save the money you’d spend on the fuel cell and put it towards the 200 trans!