Jul 2, 2020 #1 1 1990SCSB Newbie Joined Oct 30, 2018 Messages 5 Reaction score 0 Location Ohio Putting a 6.0 in my 1990 RCSB. The old trans is a 700R4. New trans is a 4L80E. How do you get the speedometer to work .
Putting a 6.0 in my 1990 RCSB. The old trans is a 700R4. New trans is a 4L80E. How do you get the speedometer to work .
Jul 2, 2020 #2 Dropped88 Supporting Member Supporting Member Joined Dec 25, 2017 Messages 1,325 Reaction score 3,212 Location Georgia You'll run Speedo output from ecm directly to Speedo input on cluster