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Last week c-4 gave up. It is in a 89 Mustang with 2.3 turbo. I don't want to mess with this again. I am running 8ua computer, big throttle body, intercooled, big vam, 3" exhaust , ranger cam, etc. What i need is input on transmission and torque convertor to handle the power of the engine. Who...

Trying to decide on gear ratio of 89 Mustang 2.3 turbo c-4 intercooled. Still has original 3.73 gears. Approx 3000 rpm at 55 to 60. needest to say not good on gas. This is daily driver for wife. Tire size p225/60r15. Shifting is between 3300 to 3700rpm. The way I read I need to stay under 3000...

Started today going to church. 89 Mustang stock alternator. Got in boost battery light came on. Gauge showed no charge then back to normal.Tonight put vent on trans side of vac line to c-4 to get shift better, it is better. Done same thing every time I got into boost then went to normal when out...

Started a new thread didn't want to take over the previous one. While we are on this subject.As a update 2.3 turbo in 89 mustang notchback. Started out with c-3's what a nightmare. Found c-4 possible c-5 per trans man. Installed this trans. Been running about 8,000 miles now. My question is I am...

about to change from nonintercooled to intercooled. i have big vam intake with air charge sensor big throttle body. Which one to use lb3 or 8ua Iknow I have to repin. Car has c-4. Also on intercooler to change a thunderbird intercooler to water with small mg or vw rabbit radiator. I am thinking...

Hello I would like to introduce myself. I have been reading your forum for some time. it has been helpful on buiding my wife's mustang. It is a 1989 mustang notchbach with a 2.3 turbo c-4 tranmission. It is I think 86 motor nonintercooled with pk1. I put the transmission,motor,and interion from...