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Old May 15, 2011 | 08:18 PM
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Had P1870 code. Slow shifting 3-4, hard 1-2. Chanced out the valve body and pressure plate. Now I still have the slow 3-4 and no reverse when tranny is hot. No codes.

Since the valve body doesn't control the reveres, what is happrning?

Any thoughts? Thanks in advance.

BTW I double and triple checked the torque on all the bolts and sequence two to three times.
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Old May 16, 2011 | 09:30 AM
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ttt
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Old May 16, 2011 | 11:19 AM
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Have you had the TCC valve in the valve body replaced? If not that could solve those issues. Its a kit that replaces a weak design by reaming a larger opening and using a new larger piston/valve. Most trans shops can R/R this for you without removing anything but the pan and valve body.
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Old May 16, 2011 | 12:09 PM
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The new vb had that mod
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Old May 16, 2011 | 04:49 PM
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Recheck fluid level. It is VERY IMPORTANT to check the fluid level when the fluid is between ~86 deg, F - 122 Deg. F. (per GM spec.)

I had a slight slipping after a H/C install. I checked the Trans fluid @ 180 deg., it was full. I let it cool to the proper temp ~100 deg. and I was 22 oz. low!!!!

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Old May 16, 2011 | 05:04 PM
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Thanks. When the weather breaks I'll check again.

Last edited by 77BlueL82; May 16, 2011 at 05:37 PM.
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