without any warnin..... i bought a 99 chevy blazer n great condition (so i thought) a week later on a road trip to texas i pulled n2 a movie parking lot 2 sharp and had 2 stop.,when i went 2 back up i had no reverse & to top it off th trip back th blazer wouldnt shift right & RPMs run high, till this it is a SLOW take off. I have heard different ways and prices to fix it. My question what do i do? ( fluids have been checked )

 

Top 30 Common 4L60E Transmission Problems and Repair

Below is a list of common transmission problems with the GM 4L60E Transmission and possible solutions to repair. Although you may have some of these symptoms / problems with your 4L60E Transmission, the repair solution may differ. This list is merely a guide to the possible solutions. For a complete diagnosis on your GM 4L60E Transmission problem, contact us for a Free Diagnostic.
1. Slow, slipping or no reverse: “lo-reverse” clutches are worn out, fluid leak in the reverse apply circuit, or broken sunshell. It is possible to remedy a fluid problem by removing the checkball from its cage in the case in the rear of the transmission may help (must remove valve body), or adding a high-viscosity additive or other seal restorer product. May also have worn boost valve (can replace in the pan).Hope this helps .