4L70E question
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Junior Member
Joined: Apr 2011
Posts: 25
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From: Belleville, MI
Car: 1992 Z28
Engine: 388
Transmission: 4L70E
4L70E question
Has anyone put a 4L70E behind a gen1 small block? I have one and am trying to figure out what I need to make it work properly in the mechanical sense like correct geometry of the torque converter to crank/flexplate.
Joined: Jul 2000
Posts: 6,521
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From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: 4L70E question
Some earlier 4L80-E applications in 3/4 tonne truck LS_ engine apps used a .4" spacer between the crank & flexplate to match up with the SBC/BBC depth converter. You'll probably find it's too deep a converter in the 4L70-E.
Thread Starter
Junior Member
Joined: Apr 2011
Posts: 25
Likes: 0
From: Belleville, MI
Car: 1992 Z28
Engine: 388
Transmission: 4L70E
Re: 4L70E question
Thanks for the reply. It turns out GM had a kit just for using the LS style trans and converters behind gen1 and 2 engines but discontinued it. I found one at Jegs though so I'm good to go.
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