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4l60e 91 k1500 SLE 5.7l 218,000mi
Posted to Transmission Forum on 10/27/2013 26 Replies

I'm looking for some insight on this trans. (sons truck.) I put a used supposedly low mi. trans. in his pickup 8mo. ago. worked fine until other night it acted as if it went into neutral when shifting into 3rd. Let off throttle some it still moved along but didn't feel right. Checked fluid level, ok, not burned. On the way home it would would go into neutral, or felt it. If I pulled over, turned off engine, restarted it would take off and go for a while until I'd hit an incline. I'm not an auto trans. guy at all so please bear with me. I hooked up Tech2 and found p/n switch doesn't read correctly all the time. From what I've been able to dig up it seems 3rd gear is a common issue with these transmissions, but without the burned fluid, or manually downshifting once it's seemed as if it went neutral I'm a bit confused on the next step. Any ideas would be great!

Glen Beattie
Technician/Shop Foreman
Deerfield Valley Transit Garage
Wilmington, Vermont, USA

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