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Old 01-29-2010, 11:59 AM   #1
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Default 4T60-E shift kit project

I guess I got to be the guinea pig for this project.

With the help of Dan and BillBoost, we finally got a shift kit made up for a 1995 4T60-E. There are some physical differences between the different models, but they all work on the same principle. To cushion the flow of fluid.
Take a look and you will see not much difference appearance wise.

4T60-E



4T65E-HD


Come to find out, mine only needed 2 spacers to be installed below the piston. I had to measure the complete travel of each piston to where the spring is fully compressed. The travel for the 1-2 piston on mine was 0.781 inches, and the 2-3 travel was 0.750 inches. I decided to cut my tubing(spacers) that would only allow each piston to travel 0.25". That was experimental cuts anyway.

Everything was put back together, I had mistakenly installed the oil lines wrong on the accumulator. Ooops. Ended up having to drain the pan again, pull the accumulator back out and fix the lines.

Took it around the block and I immediatley noticed a difference in the 1-2 shift, but the 2-3 I could REALLY feal a difference. I don't notice much if I lightly accelerate gramma style, but if I romp on it, it does make a difference.
Questions, comments?

Here is the Tech Info write for more details...
https://www.gmforum.com/performance-137/making-installing-shift-kit-4t60-e-transmission-287906/
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Old 01-29-2010, 01:29 PM   #2
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Nicely done Mike! Great addition to the forum...now tag er up!
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Old 01-29-2010, 01:33 PM   #3
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Nicely done Mike! Great addition to the forum...now tag er up!
Oh yea, DUH!
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Old 01-29-2010, 02:28 PM   #4
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Just curious Mike, how did you install the oil lines wrong on the accumulator? Is the 4t60-e setup different compared to the 4t65-hd where the lines are not hard lines? Also, I'm assuming with the lines wrong there was no transmission movement at all (no gear changing)? If you made the mistake, it'* possible someone else doing this could as well, so it would be nice to document how not to do it. Save someone else having to drain the trans again.
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Old 01-29-2010, 02:39 PM   #5
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Glad you brought that up Tom.

There are 2 hard lines, and 1 soft line. Looking at the diagram below, you can see the 3 lines...
Lines (44) and (16) are the same size, line (19)is bigger than the other 2.


I was under the impression that it was not physically possible to connect the 3 lines more than one way. The 2 smaller ones can be swapped around. And yes, you still will go somewhere. It struggles in reverse and I only get up to 2nd gear.
I did notice some tension in the re-install of the accumulator when I first installed it. I chalked it up to the lines just arguing with me. Didn't notice until after everything was put back in.
I did annotate that possible mix up in the Tech article, so hopefully everyone that does the mod, notices it.
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Old 01-29-2010, 02:44 PM   #6
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Forgot to mention, the 4T65-HD is setup just like the 4T60E. As you can see in Dan'* picture, his also has 3 lines, 2 rigid, 1 partial rigid with rubber tubing.
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Old 01-29-2010, 02:53 PM   #7
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When I did mine I remember there being 3 hard lines that all folded down. I think Dan'* trans is different from mine.
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Old 01-29-2010, 03:39 PM   #8
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The one small line, did it have a rubber hose type coupling in the middle?
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Old 01-29-2010, 03:59 PM   #9
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I don't think so, I remember the small line being just like the others, and bent in the same direction. See how the two just fold down on Dans? All three were like that.
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Old 01-29-2010, 04:22 PM   #10
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Quote:
Originally Posted by ymmot04 View Post
I don't think so, I remember the small line being just like the others, and bent in the same direction. See how the two just fold down on Dans? All three were like that.
Tom it was like midnight, there could have been a small elephant in your transmission for all you know and you wouldn't have noticed it at all. . . . .
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