Hooked up the Cteck charger to the Red Top, checked the build year of my spare T5 WC and it's an 88, put the GP up in the air to check the build year of the T5 WC and that one is also an 88. I want to rebuild one so I wanted to use the most current one. I wish one was a 90's cause they have a better gear set. I looked on Kijiji to see if there was any GM 90's T5 and there is no Gm T5 at all being sold on kijiji in Canada