i have a 95 caprice with a 4l60e tranny that is bad, i will rebuild when i can take a transmssion rebuil class in sept. Meanwhile i have a th35o in my garage that i wanna install till sept. I know it will bolt up and i know i might have driveline issues and trans mount issues thats fine, but by not having the 4l60e trans wire harness not pluged in will this cause a problem? no speedo is ok with me

Since the PCM on that car is designed to work with both the engine and transmission, I would think you would spend more money to get the TH350 to work with it, than to rebuild the 4L60E or even get one from a junkyard, even if the TH350 was given to you for free.

You could rebuild it now, so you can ask a lot more educated/experienced questions in your autumn class. Get an ATSG manual for the 4L60E and have at it.

Ditto to the above comments. Yo be time and money ahead if you just rebuild it now.

anyone here rebuild a 4l60e?? im no stranger to wrenchin on my car ive just never tried 2 rebuild a tranny, is it difficult?

There are a lot of parts, but it isn't difficult. Mainly pay attention to things such as end play, clutch stack thickness, gasket and ball valve placement, etc.

Thumb through this article and you'll get an idea - Then get a manual. It'll be the best $15 you'll ever spend on a transmission:

4L60E Repairs (http://72.19.213.157/files/4L60ERepairs.html)