<VV> V8-no Corvair

[BBRT]

The 4L60E auto trans is the standard that has been used in small trucks for 
some time. Erroneously IMHO many dealers ordered it in bigger 5.7 and maybe 
then 6 liter engines and in towing it wouldn't hold up. The 4L80E 
(Electronic Turbo 400) was the auto of choice in hvy duty applications prior 
to the Allison.  When GM changed to the Duramax and came out with the 
Allison 5 spd auto, it set the standard for auto transmissions in hvy duty 
applications. I think you can currently order the Allison with a big block 
gas-powered engine . They have a 4L65E trans I believe is used in the GTO. 
Presume it is upgraded 4L60E.  From "Automotive Engineering" mag, Tech 
Briefs, The aluminum block 6.2L V8 engine mates to the new Hydra-Matic 6L80 
electronically controlled six speed automatic transmission.The 6L80 is the 
first of a four-variant family of six speed RWD autos. Similar to the six 
speed auto introduced in the 2006 Corvette, the 6L80 was tailored for the 
heavy duty requirements of SUV's and pickup trucks.  GM is also coming out 
with a FWD six speed auto. The 6T70 co-developed with Ford. Applicable to 
AWD as well by changing the FWD differential to AWD diff.

Bill Hadley aka Swamp Rat can shed more light on this subject.

Chuck S
BBRT



 ----- Original Message ----- 
From: <mclark67 at charter.net>
To: <virtualvairs at corvair.org>
Sent: Friday, December 09, 2005 9:19 PM
Subject: <VV> V8-no Corvair


> Happy weekend everyone.  Does anybody have first-hand knowledge good, bad, 
> or otherwise of the GM 6.0liter V8?  How are the automatic transmissions 
> these days?
>
> Offlist would be great.  Thanks much.
>
>
> Mike Clark
> Stockbridge, Georgia
>
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