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Which Tranny 4L60/65 or 70 ?

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Old 09-04-2010, 10:15 PM
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Default Which Tranny 4L60/65 or 70 ?

I am about to start my LS2/Ttype conversion project.

I need a good Tranny, and i want over drive so i am deffently going with a
4L60E, The 4L65 is a little better and the 4L70 out of the SS trailblazers are suspose to be really good,

does anyone know the differences between them.
Any help is appreciated
Old 09-05-2010, 01:02 PM
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60 has 4 pinion planetary 65 has 5 pinon, 70 i dont know, def go with a 65/70 over the 60, If plan on making over 500whp, if just a cruiser 60 will be fine
Old 09-06-2010, 08:53 PM
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i think the 70 is the same 5 planetary like the 65, the 70 i heard has hardned input or output shafts
Old 02-05-2011, 07:14 AM
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Originally Posted by LS2Ttype
I am about to start my LS2/Ttype conversion project.

I need a good Tranny, and i want over drive so i am deffently going with a
4L60E, The 4L65 is a little better and the 4L70 out of the SS trailblazers are suspose to be really good,

does anyone know the differences between them.
Any help is appreciated
Bump for an old thread....... what did you go with?

What's the difference between the 70 & 80 ???
Old 02-15-2011, 10:30 PM
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I went whit a brand new 4L65E I installed a billet servo with longer pin, Pin has teflon seals so my band shouldnt slip. I also installed a Sonix billet accumulator kit billet accumulators are pinless* And i did a Transgo shift kit, PTC 2,800 stall 10.5" converter.

A 4L80E is a much stonger tranny, it is a turbo 400 with overdrive



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