01-11-2018, 05:13 AM | #18 | |
Registered User
Join Date: Mar 2014
Location: Corvallis, OR
Posts: 711
|
Re: 4.8L/6L90E swap???
Quote:
1. Run a new wire Parts: Wire (18-20 awg) Weatherpack/Metripack crimper: Amazon 6L80/90 connector: Mouser Cable seal: EFI Connection GM didn't hardwire the TUTD. You'll need to add a connector and wire to the transmission harness. See this document from Speartech: Speartech 2. Use a prebuilt switch, like this one: Speartech OR save yourself about $130 and do it yourself Parts: 8.25k ohm 1% tolerance resistor: Digi-key 4.42k ohm 1% tolerance resistor: Digi-key 1.5k ohm 1% tolerance resistor: Digi-key Momentary rocker switch (anything will do here): Digi-key Wire it up according to the attached schematic. I'll let you decide if you want it all inline and clean or if you want to hot glue the components into the small box or something, but solder everything. 3. Retune your transmission: You need to tell your computer you are running a 'Hardwire' TUTD, and setup the forced shift speeds. I used HPTuners. Also, these numbers are for a tall geared vehicle, setup your speeds for your vehicle. See the hptuners pictures. I set mine to engage TUTD when the gear select is D4 (second position for my transmission), and a button press is detected.
__________________
1972 GMC Jimmy Custom 4.8L (L20)/6L90E/NP205 1989 Chevy Suburban V2500 350/Turbo 400/4.11 gears 1996 Chevy Suburban K1500 350/4L60E |
|
Bookmarks |
|
|