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lawson85 01-10-2011 08:53 AM

1998 z28 4l60e problems
i have a 4l60e in my 98 z28. the cluthes were burnt so i had it rebuild completely pump and all. now it shifts great with one problem. does not try to shift out of second gear at all. it will hold second up to about 115 mph.(thats not normal) what could cause this?

falcone 01-10-2011 09:04 AM

it could be a bad shift solenoid... or it could even be disconnected too....

lawson85 01-10-2011 09:06 AM

i was thinking it was somthing in the electronics ,but im not that good with the elec. controlled tannys.thanks for the input

falcone 01-10-2011 09:31 AM

just so you know, you can test a shift solenoid with a 12 volt power source to see if it works or not. do you know how to get to the shift solenoid?

lawson85 01-10-2011 05:34 PM

the only thing i can think of is drop the pan. is there any other way

lawson85 01-12-2011 08:40 AM

can anyone else think of another problem?

falcone 01-12-2011 09:07 AM

yes, drop the pan and look for 2 prongs to apply the 12 volts too. or unplug it to get to the other prongs on it. you can also pull out the solenoid and test it on a bench....

transbuilderguy 01-12-2011 05:11 PM

if the shift solenoid was bad you wouldnt have third also since that same shift solenoid for 2nd is off in third also unless for some weird reason solenoid B is staying on you may need to look at scan tool data and see what gear is being commanded. possible sticking 2-3 shift valve, were the feed holes to the shift solenoids drilled if they were drilled to big more than .030 it can cause a no 2-3 until outrageous speed as it floods the shift solenoids and keeps the valve stroked when it should be exhausting. these are 2 issue there are more also maybe a bad 3-2 downshift solenoid bad

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