4t45e Torque Converter Not Staying Locked

[sparkplug]

Yeah, it goes to the garage Monday, I'm rebuilding the 545RFE in my Jeep at the moment. I don't know much about FWD trannys. Although I did take apart my MAF and gave it a good cleaning with Q-Tips. It run's better and stays locked... Until I floor it. They it's like "F- you I'm not locking!"

[geldartb]

OR if you start to get dicked around with the warranty process...

I can completely understand wanting to do it yourself but transmission issues are not easy to tackle especially if you've never been in one before.

this and unless you have another vehicle to drive it would be a huge PITA to try and get it done quickly.

[3400-95-Modified]

OR if you start to get dicked around with the warranty process...

I can completely understand wanting to do it yourself but transmission issues are not easy to tackle especially if you've never been in one before.

[sparkplug]

True.

[geldartb]

save that for when the warranty runs out.

[sparkplug]

I'd like to know for my own personal knowledge.

[geldartb]

If it's under warranty why would you even want to think about taking on a transmission issue... Just bring it back and have them troubleshoot it or fix it.

i'm with him. if you can have someone else screw around with it and not have to pay then go that route.

[3400-95-Modified]

If it's under warranty why would you even want to think about taking on a transmission issue... Just bring it back and have them troubleshoot it or fix it.

[sparkplug]

Hmmmm. I was hoping it was something easy to fix. The car is under warranty and since I don't have access to a scanner to I"ll have to take it to the dealer.

[3400-95-Modified]

Start with finding a way to monitor temps... then go from there. The sticky valve issue is knows for transmissions that have been neglected and caused excess wear on the valve body bores, at that mileage it doesnt sound like that should be the issue though.

The other thing to check is the trans pressure itself as well to ensure that is correct. I'm not sure what the testing procedure is for a 4t45e since its electronically controlled pressure vs my vac on my 4t60e.

[geldartb]

GM did some upgrades to the valve body is 02-03 so you shouldn't see the issues that the previous years saw.

[sparkplug]

So would a fluid and filter change help? Or do I need to replace the TCC? And I'm assuming http://www.rockauto.com/catalog/moreinfo.php?pk=1217365 thats what your talking about?

[bob442]

Could be a sticky valve, or maybe you damaged something when swapping the motor? Anyways, a scanner will tell you tcc apply pressure and slippage. Issues are known to happen with tcc on 4t45e/60e/65e. A cooler won't fix this.


Sent from my iPhone using my iPhone at work cuz I have nothing to do

[sparkplug]

I guess I'll have to add another cooler and go from there.

[robertisaar]

a scanner would only work if it was able to read sensor values(most don't), unless the temps got high enough to set a DTC, then you would see it, but that's not likely.