MustangWorks.com : Ford Forums - View Single Post - What would cause an auto tranny to whine in first gear?

91LX2Bfast · 06-24-2003, 09:35 AM

I have 3 cars with 4R70W's backing up 4.6 2V's in the driveway and they all whine to a certain extent in 1st gear. Its more pronounced if you are manually holding the trans in 1st, and get past 2K rpms. See if you can drive a stock 4R70W car and then compare that whine to the new trans.
Check out www.mtcforum.com and ask they question over there, One of the engineers who designed/built the 4R70W, and who is now an engineer at Roush Racing posts over there. His name is Jerry and he should be able to help you out.

06-24-2003, 09:35 AM	#4
91LX2Bfast Registered Member Join Date: Dec 1999 Location: Warrington, PA Posts: 694	I have 3 cars with 4R70W's backing up 4.6 2V's in the driveway and they all whine to a certain extent in 1st gear. Its more pronounced if you are manually holding the trans in 1st, and get past 2K rpms. See if you can drive a stock 4R70W car and then compare that whine to the new trans. Check out www.mtcforum.com and ask they question over there, One of the engineers who designed/built the 4R70W, and who is now an engineer at Roush Racing posts over there. His name is Jerry and he should be able to help you out. __________________ '97 T-bird LX 4.6L 2V, auto SVO heads/intake, Vortech T-trim, front mounted intercooler, blower cams, Cobra crank, Manley H-beam rods, JE pistons, Aeromotive fuel system w/ 42# injectors, and much more No times yet