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Gary
Gary, Pontiac Technician
Category: Pontiac
Satisfied Customers: 15729
Experience:  15 years GM master tech/15 years ASE master
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My radiator broke causing coolant to go in the transmission.

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My radiator broke causing coolant to go in the transmission. Now it won't shift right after I tried flushing the transmission with a machine with new fluid
JA: How old is the transmission? Have you noticed any leaking?
Customer: No leaking. The car is a 2005 Pontiac grand prix.
JA: Are you fixing your Grand Prix yourself? What have you tried so far?
Customer: Yes I am. I tried flushing the transmission with new fluid but noticing hard shifting. Also rpms can go pretty high.
JA: Anything else you want the mechanic to know before I connect you?
Customer: Yes. Are all the 3.8 of a 2005 with or without supercharge have the same transmission?

Welcome! My name is ***** ***** I will do my best to assist you with this problem.

coolant in a transmission will cause the clutch fiber plates to deteriorate and cause this issue

this will need a transmission swap or this one rebuilt

yes the transmissions are the same super charged or not

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Gary and 3 other Pontiac Specialists are ready to help you
Customer: replied 1 month ago.
Also what's the best way to get the mixture out of the engine? I've tried several flushes but it seems like there's still some there. I think that it's kinda causing it to overheat.

i prefer the prestone chemical cleaner it will remove everything out

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