Rebuild a 4L60E to be a 4L70E?
Thread Starter
TECH Enthusiast
Joined: Sep 2003
Posts: 730
Likes: 66
Rebuild a 4L60E to be a 4L70E? I have a Hummer H3 with the 4L60e and need to upgrade the trans for power. Is a new 4L70E a better move than a built 4L60E? The truck is AWD.
I'm not sure whats different with them case wise or internals. A new 4L70e looks to be cheaper than a built 60e.
Any recommendations on a trans builder if the built 60e is the way to go?
I'm not sure whats different with them case wise or internals. A new 4L70e looks to be cheaper than a built 60e.
Any recommendations on a trans builder if the built 60e is the way to go?
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
A 4L70E is a late model 4L60E with an Input Speed Sensor (ISS). I don't think it has the 4L65E parts such as 5-pinion planets and hardened input shaft because there is also a 4L75E. I suspect your H3 actually has a 4L65E; which would mean that a 4L70E would be weaker than what you have.
Assuming you would like a firmer shifting trans, get a well built 4L65E from sponsors FLT, RPM or Performabuilt.
What year is your H3?
Starting around 2008 significant changes were made which affect PCM/TCM compatibility.
In particular the 3-2 shift valve was deleted and the pressure manifold switch was replaced with a mechanical switch on the internal shift rod.
Assuming you would like a firmer shifting trans, get a well built 4L65E from sponsors FLT, RPM or Performabuilt.
What year is your H3?
Starting around 2008 significant changes were made which affect PCM/TCM compatibility.
In particular the 3-2 shift valve was deleted and the pressure manifold switch was replaced with a mechanical switch on the internal shift rod.
Thread Starter
TECH Enthusiast
Joined: Sep 2003
Posts: 730
Likes: 66
I have a 2008 Alpha H3
RPM has a 4L65E which would be fine as long as it is going to actually work. Can a 4L60 be rebuilt as a 4L65 as far as internals. I wanted something that just swaps in.
RPM has a 4L65E which would be fine as long as it is going to actually work. Can a 4L60 be rebuilt as a 4L65 as far as internals. I wanted something that just swaps in.
Last edited by Spinmonster; Dec 5, 2013 at 04:50 PM.
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
Yes, a 4L60E and 4L65E are externally/electrically identical.
Just a tiny difference in the internals.
Be sure to talk to RPM so they know you have a 2008 and build it with the correct valve body.
Just a tiny difference in the internals.
Be sure to talk to RPM so they know you have a 2008 and build it with the correct valve body.
