Conversions & Swaps LSX Engines in Non-LSX Vehicles
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4l60e question

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Old Aug 23, 2006 | 10:52 AM
  #1  
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Default 4l60e question

why wont an LT1's 4l60e work with an LS1?
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Old Aug 23, 2006 | 11:01 AM
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From: Simi VAlley,CA
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I see no reason why the trans would be a problem. As long as it is properly controlled it won't matter if an LS1 or an LT1 is in front of it.
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Old Aug 23, 2006 | 11:04 AM
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The LS1 got the new "300mm" version. The converter bolt circle is different, and the spacing is also a little different. Solve those trivial issues, and you can indeed run the LT1 version behind your LS1.

You'll notice the bellhousing is also different, but that doesn't stop it from working. It'll bolt up to the motor just fine.
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Old Aug 24, 2006 | 05:54 AM
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I have seen convertor rings available (maybe ebay) that bolt onto the crank flange ontop of the flexplate that make the LT1 trans work with the LS engine.
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Old Aug 26, 2006 | 05:47 PM
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From: cobourg ON
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internal wirring is said to be different as well from wha I've been told many times now by different reputible tranny shop around here
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Old Aug 26, 2006 | 10:50 PM
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It depends -- pre 1995 models didn't have a PWM 3-2 downshift solenoid for instance..
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Old Aug 27, 2006 | 12:43 AM
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From: LT1 land...the "409" of the 90s!
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I have built LT1 units to go behind LS1s no problem Just needs custom converter
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