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  #1  
Old 09-08-2011, 01:40 PM
big_gto big_gto is offline
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Default 4L60 Transmission
Is this trans a weaker version of the Turbo 350/700R?

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Old 09-08-2011, 02:43 PM
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No, its a 4 speed version of the turbo 400.

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Old 09-08-2011, 08:48 PM
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The 4-speed 4L60 is based on the 3-speed TH350.

The 4-speed 4L80 is based on the 3-speed TH400.

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Old 09-08-2011, 09:42 PM
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Quote:
Originally Posted by b-man View Post
The 4-speed 4L60 is based on the 3-speed TH350.

The 4-speed 4L80 is based on the 3-speed TH400.
Correct.

The 700R4 morphed into the 4L60 then the 4L60E.
They seem to be ok into the 11's with most small blocks, after that they need help to live.

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Old 09-08-2011, 11:15 PM
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Originally Posted by Formulabruce View Post
No, its a 4 speed version of the turbo 400.
yup I was wrong, 4L80 is a truck tranny now based on the 400

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