Hello All! I have a question about my Buick transaxle. It is a 1993 Buick Lesabre Limited 3.8 with 4T60-E transaxle 2.84 ratio with TCS. It has 230,000 miles, owned for 12 years and continuously maintained. I need a new transaxle. The transaxle had been previously overhauled by AAMCO at 122,000 miles.

GM has available a unit that is listed as "without traction control." and they show that the proper unit "with TCS" is discontinued. I have the 2 part numbers. I am a licensed auto mechanic, now working in security electronics.

Reading the GM manual on ABS/TCS tells me that the TCS is a part of the ABS system. Apart from the physical force feedback from the axles, I don't see how the 2 transaxles would be different.

The Big question: Can I install a non-TCS transaxle into my TCS-equipped Buick? Would TCS operation from the computer harm the transaxle?

Maybe I can disable the TCS function coming from the ABS/TCS computer. The diagram shows a Pressure Modulator Valve (PMV) pressure switch that (if snipped) might prevent TCS operation, to avoid damage to the transaxle, if that is a concern. I hate to pass up on the certified GM unit because my original unit is likely not rebuildable.

Like I said earlier John, I don't see how there could be a difference in transmissions with TCS. Last I knew, TCS was a sub-system of the ABS system and was not integral of the trans.