Just found this in a press release from Cadillac:

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">
heavy-duty Hydra-Matic transmission

To handle the additional power of the Escalade's V8, the ESV employs a new Hydra-Matic 4L60-E electronically controlled four-speed automatic transmission with overdrive. This heavy-duty version of GM's smooth-shifting workhorse features a wide variety of internal enhancements to improve both torque capacity and durability.</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Any idea on what makes the tranny "heavy duty?" Seems like that is the weakest link in our drivetrains...

<small>[ September 18, 2002, 09:15 AM: Message edited by: Scream ]</small>

 

hmmm, hadn't heard of the 4L65E designation...the Caddy website calls it a 4L60-E HD.

http://cadillac.com/cadillacjsp/mode...lade/spec.html

 

Thanks for the info, btw!

 

Are you sure it isn't 4L80E and 4L85E? Those are Hydra-matic's heaviest duty transmissions before stepping up to the Allison.

 

I know Jet makes a rebuild kit for the 4L60. It is suppose to be stronger. Just read about it but I dont know first hand.

<small>[ September 18, 2002, 10:15 PM: Message edited by: RED2K ]</small>

 

They're calling it the 4L65E.
Compared to the 4L60-E, it has:

Five pinions in the input and reaction gearsets for 20 percent more torque capacity

New aluminum construction bushings in the stator shaft, providing higher torque capacity in a lighter-weight design

An extra clutch plate in the third and fourth gear clutch (7 vs. 6) for added capacity

A new induction heat treating process for the turbine shaft to improve durability

Improved strength at the lubrication holes for greater durability

Larger diameter clutch rollers in the (low/reverse) roller clutch assembly

Induction-hardened splines on the stator shaft for more durability and strength.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by CMNTMXR57:
<strong>Are you sure it isn't 4L80E and 4L85E? Those are Hydra-matic's heaviest duty transmissions before stepping up to the Allison.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">According to Caddy's website, it's called the 4L60-E HD.

 

It is the 4L65E, though. The Escalade, I think Denali, and the new SS has it (for the extra HP and TQ)

 

True. I wish that GM would make up their mind about what they want to call it because they call it the 4L65E in their Hummer H2 & Denali info sites.
Denali
H2

The GM Powertrain site even has it and the 4L85E listed:
GM powertrain

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Scream:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by CMNTMXR57:
<strong>Are you sure it isn't 4L80E and 4L85E? Those are Hydra-matic's heaviest duty transmissions before stepping up to the Allison.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">According to Caddy's website, it's called the 4L60-E HD.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yea, I guess I'm just as confused. Some call it one thing, I simply call it a 4L80/85E. <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />