lawsoncl
NAXJA Forum User
- Location
- North Idaho
Really harsh shifting at low throttle.
Lol alright, that's on me.Really harsh shifting at low throttle.
Why do you care? The difference at freeway speeds is only 100 rpm!What is the way to find if my 1990 XJ has a 0.75 or the 0.705 OD ratio without counting output splines? Can this be found by VIN or a serial number on the AW4, or other marking?
I'm using the GM throttle body, it measures 71.73mm I've bored the intake to 66.70 and made a adaptor for a smooth transition between them.You don't need to swap the AW4. It should work with a 91-97 TCU, and a TPS signal that runs 0->5 volts instead of the Renix TPS which ran 5->0 volts. The TCU will plug into your harness, but you will have to shave off the raised notch on the wiring harness connector. The data lines changed along the way, but you're not planning to use them and the Renix data lines just went to the yellow diag connector. The difference in the AW4 gear ratios won't be an issue. I'm running a 98 AW4 with a 89 TCU.
How are you handling the throttle body? Are you not able to use the dual output TPS sensor for the Vortec computer? You still need the throttle body to trans cable to control the shift pressure.