Hello all, I am starting a frame swap on my 86 c10 onto a 87 k10 frame. The donor had a 700r4 and np208. My truck has the th350c, and i have thought about putting the shorter shaft in the 350 and using it or cutting the 2wd shaft? Have thought of using a 4l60e. Forgot to mention that it is ls swaped w a 2002 5.3 so i already have a computer on the vehicle and so i was also wondering if i can use a 96-97 4l60 because it has the 4 hole tail housing. I have read some other threads and i believe that i cannot use the older 4l60 w the newer computer. I also have a Dakota Digital speed pulse through adapter the a vss isn't an issue. Thank you all for your insight!
You can use the 96-97 4L60e with the 2002 computer, it will control it just fine.
Look for a 97 as opposed to a 96...1997+ 4L60Es came with much better forward drum bonded steel and rubber apply piston compared to 96 and back that had the aluminum pistons for the forward and coast clutch and the forward clutch piston likes to crack after 150k miles or so...
Is your 5.3 stock or modded?
If stock or lightly modded, a 4L60E will be sufficient...Be sure it's a healthy unit then, once in your possession, perform the following before installation:
- Purchase a Fitzall TCC PWM regulator valve and install it in place of the factory outboard valve and spring - this converts the PWM to an "On-Off" and repairs/seals off the bore as it's very common for 96-00 valve bodies to have issues (harsh, late 1-2 shifts and DTC P1870)
- Check the 1-2 accumulator piston - if it's plastic, replace it
- Use a multi-meter to check all the solenoids for resistance; replace any that aren't passing the test
- Replace the filter
ETA: You will need to purchase an adaptor/spacer for the flexplate to run the 96-97 torque converter...
