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Gary, Technician
Category: Car
Satisfied Customers: 17157
Experience:  GM master tech for 15 years/ASE master tech for 20 years
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GMC P/U Sierra: 4L60 (16 pan bolts) will not go into reverse.

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4L60 (16 pan bolts) will not go into reverse. Pan is off what
solonoid could be defective.

Welcome to Justanswer ! my name is XXXXX XXXXX i will do my best to assist you with this problem

so all the forward gears worked just fine just reverse acted like it was in neutral when it was physically shifted into reverse ?

Customer: replied 4 years ago.

Gary : The truck runs well going forward !!!

The engine races up as though you were in neutral

or park ?????? while trying to back up ?????

ok please don't shoot the messenger here but these 4L60 use no electronics for reverse to work

even if all the electronics are disconnected off this transmission it should still have reverse and a forward gear

internally with no reverse either the low/reverse band has failed, the reaction carrier has failed or an outside chance of the planetary gear failed

im sorry to say its going to have to come out and apart and rebuilt or the cheapest way out is to install a used/salvage yard transmission as most come with great warranties


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