adrew27l

I have a 4l60e and im looking to buy a stall in the next day or two, i found a ptc converter i want to buy
http://www.ptcrace.com/aode-converters-p-1318.html

and i believe that the 700R4 and the 4L60E are the same torque converter, but i wanted to double check, anybody know?

AChotrod

iTrader: (17)

I was wondering this earlier today. I would also like to know. It would be much easier for me to swap in a 700r4 in my M6

kierstyn

iTrader: (5)

Most of the ones I have seen have the 700r4 and the lt1 4l60 listed as the same.

djjab57

iTrader: (17)

WHAT ?!?!?!?! You are going to do a backward swap ??? REALLY !!! LOL i was going to go M6 but a stalled auto is just as fun to me. But i would also like to know

NewOrleansLT1

Yes it uses the same stall. Just do a little research...

AChotrod

iTrader: (17)

lol! Not sure what Im gonna do yet. Also not sure how long the M6 will survive with my plans and rebuilds are crazy expensive if you beef it up.

Since the 700 isnt electronic it would be easier to swap it in and legal if I decide to run Ex PA at the shootout.

robsquikz28

iTrader: (246)

Hey MIKE if you want a 4l60e I have one thats in good shape that I can sell ya for pretty cheap. It has 68k on it and if you need or want a hi performance trans rebuild I have a guy for that too. LEts just say the trans's he builds hold up in 8 sec cars
lmk

bowtienut

iTrader: (1)

700R4 trans input shaft changed spline count somewhere around 1985, so 700R4 converters from about 1986 and up are the same as for 4L60 and 4L60E.

AChotrod

iTrader: (17)

How cheap is cheap? lol PM me if needed

brucer

there is also 2 different spline counts on 700r4 and 4l60e's there are 27 and 30spline..

duh

iTrader: (16)

No offense I don't see a 4L60/E/700R4 holding up in an 8 sec. car. Hell we put one in a 9 sec car and it kept chewing them up. That's when the TH350 stepped in and whatta know, no issues since. I'm not saying it can't be done, just not likely.

Hell when I redid the trans in my 90 it could hold a lot more than what I was pushing......to bad I never got to find the limits. I guess it's time to do another one and see what she holds up to

Nothing beats building a trans yourself

adrew27l

Yes they are the same size torque converter, to anybody else who wondered..

bowtienut

iTrader: (1)

That's what I was alluding to in post #8 above. Thanks for refreshing my memory
One correction though.....ALL 4L60Es, as well as all 4L60's, are 30 spline.
700R4's made the switch from 27 to 30 spline somewhere in mid/late '85 to early '96, depending on the vehicle. I have an '86 Firebird and it came with the 30 spline 700R4.

AChotrod

iTrader: (17)

Do all 700s have the same gearing? So if I get one out of a truck would it be the same as a F-body?

robsquikz28

iTrader: (246)

FIRST SECOND THIRD FOURTH GEAR
3.06:1 1.63:1 1:1 0.70:1

4l60e

3.06 2nd 1.75, 3rd 1.00, 4th 0.70. Use with transmission controller P/N 12497316

bowtienut

iTrader: (1)

Yes, they have the same gear ratios. robsquikz has been given some wrong info. 2nd gear in 4L60 and 4L60E is 1.62X, same as 700R4.

duh

iTrader: (16)

FWIW you can now get a planetary set that drops the first gear ration down a little, relieving the huge first to second RPM drop. It actually gives the trans the same gear ratios as a F*** AOD. The planetary setup is pricey though as last I saw was around a G note.

There are options as to what can be done with it, but IMO if you're looking for a mostly strip car, go with a TH350. Light and plentiful. If you're dead set on having 4 gears, then you may want to consider just running a 700/4L60 with a TV cable and a non-lockup converter. If you're going to cruise it.....plan on a healthy chunk of change to get it to survive......Last one I worked with didn't handle 525rwhp for sh*t.

I say 350, rev. manual valve body and a brake, then put a big stall in it and watch the front end reach for the sky..... just my $.02 tho. If you're really interested in sourceing parts yourself, let me know, I've got a decent connection over in Addison.

AChotrod

iTrader: (17)

Im very interested, and the only reason I wouldnt do a 350/400 is the shootout rules.

Scoobs

hey man wheres your location.. And what size 4l60e is it? Will it fit the 05 trailblazer 4.2 liter? And the guy who does rebuilds whats his pricing and will he do the turbo 350s? Appreciate it.

Mikel1983bentley

700r4, you can take a 700r4 have over drive deleted and run it just like a th350, and only weigh a little more than an actual th350 plus unless they tear it apart no one will ever know