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98 Z71 4L60E no 1st or OD when hot

Discussion in 'GM Powertrain' started by cm98SILVER, Aug 15, 2009.

  1. cm98SILVER

    cm98SILVER New Member

    I have a 98 Chevy Z71 4L60E and there is no 1st gear or OD after it heats up. I can manuallly shift thru the gears. When cold all gears are there, or after the truck has been turned off gears will shift for a couple of minutes. The diagnostic tool says "Shift Solenoid". How many are there, 2 or 4, and which one do I need, or should all be replaced? There was no code number that came up, just the words. Do I have to drop the pan, filter and valve body to get to the solenoids, where are they?

    Transmission service, flush, drain, new filter has already been done.

  2. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    There are 3 solenoids which give you 4 gears. Shift solenoid A is on in first and fourth. So if SSA is bad you loos first and fourth. It's probably not a bad idea to change all 3 but it's up to you. Changing SSA should corect the problem. Keep in mind a bad connection or wire in the harness can also cause this problem. Take a good look at the wires both inside and outside the trans.

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