Transmission problems swapping to carb?
04-29-2021, 11:04 PM
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Transmission problems swapping to carb?
When dropping a carbureted motor into an 89 Trans am that originally had a 5.0 TPI, will the ecm still work for the automatic transmission or will I need a lock up kit? Is there anything else I need to know to avoid problems with this swap?
04-30-2021, 01:08 AM
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Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: Transmission problems swapping to carb?
ECM or not...
The Torque-Converter Lock-Up circuit only consists of 12v Positive and Negative...
No PWM or anything remotely complicated.
Run the Positive wire of the solenoid through the transmission case pass-through connector, inside the vehicle, through the Brake-Pedal switch, and to switched 12v (ignition).
Run the negative wire of the solenoid through the transmission case pass-through connector, through a vacuum switch to a ported-vacuum source, and then to a ground point.
There are multiple threads on this forum that go over the parts (vacuum switch, brake switch, TCC connector, Etc) and procedure...
Just do some searching.
The Torque-Converter Lock-Up circuit only consists of 12v Positive and Negative...
No PWM or anything remotely complicated.
Run the Positive wire of the solenoid through the transmission case pass-through connector, inside the vehicle, through the Brake-Pedal switch, and to switched 12v (ignition).
Run the negative wire of the solenoid through the transmission case pass-through connector, through a vacuum switch to a ported-vacuum source, and then to a ground point.
There are multiple threads on this forum that go over the parts (vacuum switch, brake switch, TCC connector, Etc) and procedure...
Just do some searching.
Last edited by vorteciroc; 04-30-2021 at 01:14 AM.
The following 2 users liked this post by vorteciroc:
87formulattop (07-03-2021), dmccain (04-30-2021)
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