700R4, 4L60, 4L60E reliability

Reply Subscribe

Thread Tools

Search this Thread

Dec 2, 2004 | 09:27 AM

DSKRALL

Thread Starter

Instructor

Joined: Dec 2002

Posts: 238

Likes: 1

700R4, 4L60, 4L60E reliability

1)Have the automatics proven to be reliable in a stock drivetrain that receives proper maintenance and is not stressed by any form of racing?

2)Does shifting the transmission manually affect reliability?

3)Can the 4L60E electronics be adapted to a 4L60?

Dec 2, 2004 | 11:11 AM

CFI-EFI

Race Director

Joined: Sep 2000

Posts: 17,298

Likes: 33

From: The Top of Utah

Quote:

Originally Posted by DSKRALL

1.) What do you consider reliable? In their early years, 1982-198? (6, 7, 8?) they were quite troublesome. The factory was constantly updating them. Today there are literal millions of them on the road.

2.) It could help, slightly. A quicker, firmer shift puts less wear on the friction materials.

3.) I guess nothing is impossible. Besides the many different internal components, you need a computer to run it. That computer has to have MAP/MAF, TPS, VSS, and rpm inputs, at a minimum.

RACE ON!!!

Dec 2, 2004 | 07:23 PM

crkemppainen

Racer

Joined: Apr 2004

Posts: 298

Likes: 1

From: Springfield Missouri

i am hating mine right now. the LT1 pusnihed it to it's early demise. rest in pieces 4l60

Dec 2, 2004 | 07:33 PM

Nathan Plemons

Race Director

Joined: May 2001

Posts: 14,165

Likes: 9

Quote:

Originally Posted by CFI-EFI

2.) It could help, slightly. A quicker, firmer shift puts less wear on the friction materials.

Manually shifting a 700R4, 4L60 or 4L60E does not affect the shift speed. it simply determines when the trans will be able to shift. Unless you've got a full manual valve body all that selector does is limits what the maximum gear the trans can go into.

To actually affect shift speed and firmness you've got to rip it apart and start installing shift kits, etc. With the 4L60E you can do a lot of neat tricks in the computer to firm up the shifts by adjusting the pressures and such.

Dec 2, 2004 | 08:51 PM

CFI-EFI

Race Director

Joined: Sep 2000

Posts: 17,298

Likes: 33

From: The Top of Utah

Quote:

Originally Posted by Nathan Plemons

Manually shifting a 700R4, 4L60 or 4L60E does not affect the shift speed. it simply determines when the trans will be able to shift.

But since you can't make it shift sooner, manually, I assume, the manual shift will be made later, than if left in drive, with the given throttle pressure. The higher rpm, means a little more line pressure, which means less slippage. Remember, I said, "It could help, slightly.".

RACE ON!!!

Dec 3, 2004 | 01:02 AM

Mad-Mic

Pro

Joined: May 2003

Posts: 682

Likes: 1

From: Annapolis MD

Quote:

Originally Posted by DSKRALL

1. my 700R4 has taken a beating the last 40k in miles since i've owned it and it had 30k on it when i got it. the car was babied by a female owner.

2. i drive the snot out of this car. manually shifting up and down. trick is to let the line pressure come up before you romp on it. let off the gas let the gear catch then romp on it

transgo sells a full manual shift kit strictly for this if you want. i don't have one. will on the rebuild after it goes up after H/C/I with nitrous next year.....lol

3. No. the 4L60 is basically a 700R4 with a TV cable but the rest is electronically controlled. the 4L60E the computer takes all control of the trans like shift points.

i'll also say a #4...
aftermarket performance trans builders can make them hold gobs of torque and lots of horsepower. they can be custom built to suite your needs along with different stall converter speeds with custom builds that lets the converter come in hard or soft depending on your liking.

hope this helps.