92turboLE Posted August 28, 2003 Report Posted August 28, 2003 Ok, so now im confused. I dont know what tranny is in my car. I have read that if it is 93 and newer, then its 4T60E and 92 and lower is the 4T60/440T4. so i would assume my 92 is a 440T4/4T60. but now i read on this site that it is a 4T60E. now when i added my air intake, that was fucking with my shifts. It wouldnt shift til way late, and i assume thats cuz with more air coming in, there is less vacume, which in turn fucks with a vacume controlled tranny, but how could my tranny have been acting up if its a 4T60E??? - Justin Quote
gmrulz4u Posted August 28, 2003 Report Posted August 28, 2003 Well, you should first understand that VACUUM, will not effect your shift TIMING at all! Too much vacuum, or too little vacuum, will have no effect on what the engines RPMs are before up-shifting. The Vacuum connection and modulator only determine shift FEEL... If it is a 440-T4, it's controlled soley by the TV(Throttle Valve) Cable. If it is a 4T60-E, it's controlled soley by the ECM. Other than that, I don't really know why changing the air intake would effect shift points...? Quote
Robby1870 Posted August 28, 2003 Report Posted August 28, 2003 you have a TH440-T4/4T60. It shifts later, because your foot's stuck to the floor board Robby Quote
grandprix104 Posted August 28, 2003 Report Posted August 28, 2003 you have a TH440-T4/4T60. It shifts later, because your foot's stuck to the floor board Robby good one Quote
GnatGoSplat Posted August 28, 2003 Report Posted August 28, 2003 3.1's got the 4T60 up till 92. 93 they went to the 4T60-E. 3.4 DOHC got the 4T60-E 91+. Quote
slick Posted August 29, 2003 Report Posted August 29, 2003 Look on the underside of the tranny. Mine says 4T60E. Quote
SmoothSteve3 Posted August 31, 2003 Report Posted August 31, 2003 It's definitly the 4T60/TH440. But I actually enjoy having the TH440 in my lumina.......I've got a little more control over shift-points and RPMs. But yes, its a regular 4T60. SmoothSteve3 1990 Chevy Lumina 3.1 Liter V-6 Ride on White Lightning Quote
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