GM Drivetrain & Suspension Chassis | Transmission| Driveshaft | Gears/Rear End/Differential | Traction Aids

4L80e slipping after HD2 install

Old Sep 26, 2013 | 07:49 AM
  #11  
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Yes I did. I played with it to make sure too. I seated it, then i pulled on it from under the valve body to see if it could naturally seat itself... it didn't, so I had to correct it. I don't know fir sure that its in the right spot now, but when I bolted the pan back up it was in the hole for sure.

I have faith my clutches are fine because the fluid doesn't smell burnt and its clean as hell, I know its fresh, but still. Also, at light throttle it doesn't slip at all.

Kurt was very thorough when doing the shift kit install... but it was a first time for both of us. I will be testing the line pressure today, so that will help us figure this out once and for all.

Last edited by Vortec350ss; Sep 26, 2013 at 07:58 AM.
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Old Sep 26, 2013 | 08:21 PM
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The day is almost over. Where is the update?
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Old Sep 26, 2013 | 09:28 PM
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Finally got the gauge hooked up. It was a pain in the *** in the 4x4 especially since I didn't know exactly where it was.

Drum roll please!!!!! Pressure is steady at 40psi no matter what gear I'm in. Park, reverse, neutral, drive, first and second.

Ill call trango tomorrow to get their take on it. Anyone have any suggestions?
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Old Sep 26, 2013 | 11:10 PM
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40psi, that's not good... keep us posted.
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Old Sep 27, 2013 | 12:45 AM
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i still think its that pos relief valve assembly but guess we will find out
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Old Sep 27, 2013 | 04:18 AM
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Yaaaa, that's way way low. Esp in reverse.
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Old Sep 27, 2013 | 06:50 AM
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Now I need to find a local guy who knows his way around trannies and hopefully has experience with the HD2
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Old Sep 27, 2013 | 09:57 AM
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You can remove the HD2 relief valve and tap/plug the hole, you can probably do it without even removing the valve body.
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Old Sep 27, 2013 | 12:13 PM
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Just got off the phone with transgo and they basically told me the data was useless because I didnt rev with the gauge attached. Son of a bitch... trying to do this **** without help (how the F*CK do I rev the engine and look at a gauge thats 12" from my tranny at the same time), without the perfect tools, and not having done it before is getting really frustrating.

How is it possible he couldn't tell me anything? Bottom line is I need someone with experience surrounding these transgo kits to take a look at it.
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Old Sep 27, 2013 | 12:44 PM
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String to pedal. Pull string while under car.
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