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Old 10-21-2021, 01:22 PM   #1
71meangreenc10
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4L60E Backwards Compatibility

Has anyone looked to see if newer 4L60E's are backwards compatible with just changing out the valve body and case plug? I have a 3LPD with shows to be a 2013/2014 style with a Blue Case Plug. My vehicle is a 2005 5CHD transmission with a Green Case Plug. I would understand PCM problems if the case was machined different and the valve body circuits were different. Looking at the valve bodies, they look to be the same besides the newer added wiring on the 3LPD along with what looks like a ISS in the case.

Thoughts?

Smitty
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70 C10 Suburban Former military GSA truck.
72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378
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Old 10-21-2021, 03:42 PM   #2
Ziegelsteinfaust
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Re: 4L60E Backwards Compatibility

They probably are.

My th700 has 4L65 parts inside for a roughly level 2/3 build.

Chevy don't change much.

Now if they would reintroduce 1973 C10's with traditional sbc's I would be happy.
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Old 11-05-2021, 02:43 PM   #3
71meangreenc10
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Re: 4L60E Backwards Compatibility

It works all day long...

Smitty
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71 C10 283/3SPD Full Resto
71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599
70 C10 Suburban Former military GSA truck.
72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378
72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110
68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head
71 C30 Wrecker
71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck
68 GMC Long Stepside. They keep following me home
71 C20 Longhorn/Ole Yellor
69 C30 Former Motor Home, Flat Bed time
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