NJFBOA - Home of New Jersey's Camaros and Firebirds - View Single Post

Stevoone · 11-09-2011, 07:58 PM

This may belong in the Transmision section but my main question is about ECM tuning.

The car is a 1994 Pontiac Bonneville 3.8l (non-supercharged) OBD1.

Good customer dropped off his car with a bad trans. He located a low mileage used trans from the same year car but it has a different RPO code for the Gear ratio. The car originaly had a 3.06 Gear ratio and the replacement transmission has a 2.84 gear ratio. I can swap the internal parts to correct the gearing issue but to try and keep the parts and labor down I was wondering about having the ECM tuned for the lower gear ratio.

Is it possible to tune the ECM to recognize the gearing change? Is there anyone somewhat local to Burlington City that would be able to do this? And how much (estimate/ball park) would it cost to have it done.

11-09-2011, 07:58 PM	#1
Stevoone Join Date: Mar 2007 Location: NJ Posts: 540 iTrader: (2)	Tuning / shift points This may belong in the Transmision section but my main question is about ECM tuning. The car is a 1994 Pontiac Bonneville 3.8l (non-supercharged) OBD1. Good customer dropped off his car with a bad trans. He located a low mileage used trans from the same year car but it has a different RPO code for the Gear ratio. The car originaly had a 3.06 Gear ratio and the replacement transmission has a 2.84 gear ratio. I can swap the internal parts to correct the gearing issue but to try and keep the parts and labor down I was wondering about having the ECM tuned for the lower gear ratio. Is it possible to tune the ECM to recognize the gearing change? Is there anyone somewhat local to Burlington City that would be able to do this? And how much (estimate/ball park) would it cost to have it done.