4L60E Trans and Converters

[Dan Fahey]

Originally Posted by Mark Yacavone

Hi Jim,
You forgot to mention that deal is 700 bucks.
I can't see the wisdom of spending that money just to bring it close to a stock 200 1st gear. It's never going to as fast anyway. That is, unless there was a real good reason to keep the 700 trans. Such is not the case here.

If it were me, and I already had the o/d trans, I'd probably remove as much of the weight as I could, including the 4th stuff. Then I'd build an 8'', which would be basically, a metric 200 ,with a 30 spline turbine hub.
Then I'd probably figure out what gear ratio that would hang it's tongue out in the quarter. Then I'd back off one ratio, and see what happens.

But, I'm not Dan Fahey.

Dan , you don't seem like a real hands on guy, so here's what I'd do.
Sell the 460 E and the Yanker to one of your buds on the SS forum. Then let me set you up with a 200 / 8 ' combo what would be reasonably priced.
Not looking to get into a bidding war here. Either in or out..What say you?

Mark appreciate the offer.
Right now I am working a lot of hours.
Plus train daily to Ref Soccer games.
Next two weekends Reffing Elite Soccer Tournaments.

In the mean time collecting parts for Stock.
Before adding power better to build safety and reliability.
First a Roll Bar then a Beefed 8.5 rear with Ford Ends.
Those are my next two investments.

As for hands on...when I got time and can borrow a garage I do the work.
Otherwise have a couple close mechanic friends do the work.

I do appreciate your advise.
Will ping you off line.

D

[ss3011]

The bummer with having a converter built for a 4L60e is it will only fit a 4L60e . So you will own it forever . There is a lot of support for a 200 , and the transmission is dramatically lighter . Even though you have a heavy car , there is some value in being able to place the weight where you want it .

[Ed Wright]

That 4L60E belongs in a daily driver, not a race car. Listen to Mark.

[nhramnl]

Originally Posted by Ed Wright

That 4L60E belongs in a daily driver, not a race car. Listen to Mark.

Also listen to Russ Abrams. Russ worked in the transmission engineering group at GM for a hundred years and knows their stuff like the back of his hand.

[Bob Pagano]

I side with Mark, make the switch and you will save $$$ Mark has built some odd combos with much success and knows what works and what dose not. Ed is like me, (old) but very smart, listen to them.

[Dan Fahey]

Originally Posted by Bob Pagano

I side with Mark, make the switch and you will save $$$ Mark has built some odd combos with much success and knows what works and what dose not. Ed is like me, (old) but very smart, listen to them.

Hey Bob..
Nice to hear from you..
Always loved that picture !

Mark et ALL!
Which 200 Trans are you all talking about?
There is a 3sp and OD model.

Other posters recommended a Lightened 2.75 1st gear Turbo350
Never got more than 200 runs out of a Turbo 350 in my 69 Impala.
Had 1978 Oldsmobile and 1980 Pontiac Wagon with a Th200 trans.
Which got rebuilt every 20,000 miles like clockwork.

Few questions?
Will the car need a new X Member, Drive Shaft, if so what length?

My 4L60E has been a very robust unit and ATI has a converter for it.
Know Corbitt Marshburn used one on his Car.
Have well over 500 runs and a lot of street miles.
Prefer reliability over a tenth.
D

[ss3011]

Use a 200-C

Current crossmember will work with minimal modifications

Driveshaft will be longer , but you should convert to 1350 u-joints , which will need a new companion flange and front yoke . Output spline is the same on a 200-C as a 4L60e , but you will save yourself some headaches making the switch to a 1350 u-joint .