xjsnake
NAXJA Forum User
- Location
- Nashville, TN
Ok first off, I have searched and didn't find anyone discussing what I'm about to ask.
Stock 97 XJ, 4.0, AW4, NP232, 135,000 Miles
I have overheated my transmission pulling a uhaul trailer moving after graduation (stupid I know) and I will be installing a transmission cooler that I picked up at a junkyard.
I have read threads on here and other forums about doing a "Poor Man's Flush" to change out close to all of the ATF in the system.
I have also read about doing a "Drain and Fill"
I am reasonably certain that the fluids (ATF, Gear Oil, Brake Fluid, Power Steering Fluid) have never been changed...
Regardless of the method that I choose to do, I will be dropping the pan and changing the filter (screen) in the transmission post haste.
I was listening to The Car Show on the radio (yes some young people do listen to AM stations...) and they strongly recommend against changing more than about 30% of the ATF at any one time because the detergents in the ATF can clean too much gunk out and cause problems if the fluids are changed all at once.
My questions are: Would doing a "Poor Man's Flush" cause too much cleaning to occur in the transmission and send gunk flowing through my newly upgraded system? Or should I do a succession of "Drain and Fill's to slowly change the fluid over to prevent releasing too much gunk into my transmission? I do know that I have read numerous threads discussing over-cleaning by using synthetic motor oils. Would this be a similar concept to what would be occurring in my transmission?
All feedback would be greatly appreciated and thanks in advance...
Stock 97 XJ, 4.0, AW4, NP232, 135,000 Miles
I have overheated my transmission pulling a uhaul trailer moving after graduation (stupid I know) and I will be installing a transmission cooler that I picked up at a junkyard.
I have read threads on here and other forums about doing a "Poor Man's Flush" to change out close to all of the ATF in the system.
I have also read about doing a "Drain and Fill"
I am reasonably certain that the fluids (ATF, Gear Oil, Brake Fluid, Power Steering Fluid) have never been changed...
Regardless of the method that I choose to do, I will be dropping the pan and changing the filter (screen) in the transmission post haste.
I was listening to The Car Show on the radio (yes some young people do listen to AM stations...) and they strongly recommend against changing more than about 30% of the ATF at any one time because the detergents in the ATF can clean too much gunk out and cause problems if the fluids are changed all at once.
My questions are: Would doing a "Poor Man's Flush" cause too much cleaning to occur in the transmission and send gunk flowing through my newly upgraded system? Or should I do a succession of "Drain and Fill's to slowly change the fluid over to prevent releasing too much gunk into my transmission? I do know that I have read numerous threads discussing over-cleaning by using synthetic motor oils. Would this be a similar concept to what would be occurring in my transmission?
All feedback would be greatly appreciated and thanks in advance...
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