Quote Originally Posted by frugal View Post
Hi everyone, I finally have time to update my shift kit install results, I have the time because i'm on bedrest following surgery for a burst appendix and all the fun infection that happens thereafter (and I thoght the van was being a pain!). After adding the zzp shift kit, which is just a couple of dowels that limit accumulator piston travel, (cost $40 probably cost 80 cent to make!), I am happy to report no reoccuring hard shift problems, this is after 5000 miles of hard use, high temps and frequent stop starts. i was considering a mod to turn on the cooling fans earlier to reduce temps, but decided that it would be to much hassle. I am happy with this simple temporary solution. Anyone that feels disappointed with thier GM tranny should thank their lucky stars for car enthusiasts like us, that always seeks out a better way to problem solve and believe in North American made products. All you have to do is ask anyone that has owned a Honda/Acura and is stuck literally with nothing but a steep bill to pay. I cannot thank everyone enough, that takes the time out in their day to respond to people in need in these forums. Thank you!
Glad to hear my solution has helped you but as I suggested above as with my installation, I would definitely put the biggest double stack cooler that you can fit in the grill-I decided on (2) 18,000 GVW double stack 3/4 inch coolers to work along with the ZZP shift kit-the coolers do all the transmission cooling-no radiator at all. Please read my comments previously at to why I went this route. Knowing what I know now and from experience, I would put in 1 double stack 1.5 inch thick cooler of about 28,000 GVW cooling to handle the trans fluid-that should work just fine. It has been blisteringly hot in NE and my setup works perfectly-almost 10,000 miles now on the changes. Since the A/C turns the fans on when used, the fans really aid with cooling the fluid when it is very hot. PM me if anyone has other questions. I still can't believe that someone like me with 30 years of working on cars as a hobby had to come up with this relatively simple solution for the 4T65E hard shift problem!! All the "experts" want you to change the PCS solenoid or rebuild the tranny for big money when the solution costs about $100 and is better for the tranny eliminating shift slippage AND keeps the fluid cooler which it should always have been!!