How to tell different year throttle bodies apart?
#2
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Its a difference in the half moon shape disk on the passenger side of the TB. I think the old style is even and the newer styles come on slower at first then have a flat section so it gives WOT quicker but later.
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Look very closely where the throttle cable rides in this 01 TB. Its a slight curve at first and about the last half inch the curve increases significantly.