got some 4l60e questions

[DCx]

im planning an LS1 build this winter. motor is being shipped as i type. looking at the cost of t-56s and all the swap parts, i think i might be better off with an auto again.

i found a company on ebay that sells a rebuilt 4l60e that can handle 650hp, 2 year warranty, and free shipping for about the price of a well worn t56 ($1350).

i dont have a wiring harness for my engine yet. i bought someones complete swap out from a camaro getting an ls7. so a custom standalone harness is a must for me. if i opt for the automatic how many sensors get hooked to the trans? also do i need a throttle position switch or trans computer? or does the pcm handle that?

basically, how hard will it be for me to acquire a trans and make it function with a standalone harness? how many electronics are built in to the trans?

sorry for all the questions.

[Lawrence]

Theres one big plug, and the speed sensor, the PCM does the rest. You'll probably need tuning software or a mail order tune to get your shift points right unless you end up with the same rear gears and tyres as the donor.

[Steve Chryssos]

Yup. With the trans on the floor of your shop, you will plug in one large connector, and one tailshaft speed sensor. Tape the harness to the trans and motor and install as a unit. Once installed, you will splice into the engine's throttle position sensor and tach signal. One more splice for your speedo signal wire and you are done. I like to see a male/female bullet connector added to the speedo signal wire, since an uncalibrated speedo can confuse the trans controller. Calibrate the trans first. Then connect the speedo wire and calibrate that. I'll talk you through that deal. Only an issue if you have a new, uncalibrated, digital speedo.

The harness looks intimidating when you take it out of the box, many plugs are not used. Most people call me when they get their harness and I explain where every connector goes and which plugs are extraneous. Software calibration is a piece of cake--nothing like setting up fuel injection. I help people from all over the world through the setup and calibration process in about 20 minutes.