4T65 sluggish start, then a lurch and a bang

[clinebarger]

I wouldn't be so quick to use 100% & Definite with a 2nd gear start complaint on a 4T65E, I tend to be the "Mop-Up Guy" when it comes to these units.....The PCS has been replaced & a TransGo kit already installed.

Don't mistake P1811 long shift behavior with possible low AFL pressure.

 

[CoachRoss07]

I feel this was directed at me and I specifically said if you can watch the amperage go from .8 to 0 while this is happening until the car is restarted it is absolutely the problem. Tech 2s are your friend in many cases on these...

but also a faulty harness internally could be the culprit also...there are many scenarios but with a true diag it's all speculation at this point.

 

[zzyzzx]

If it's anything like my Alero, and it might be, when I thought that maybe I was having "transmission" problems, they went away when I deactivated the traction control. It was because the ABS wire at a flex point had broken. Just another thing to think about and check. Probably isn't it in this case, but it's cheap and easy to fix.

 

[zzyzzx]

TransGo part# 4T65-AFL

https://transgo.com/product-details/4t65-actuator-feed-limit/

States:
Easy, drop-in fix for worn actuator feed limit bores. on one part of the page, then states trans removal required on another part of the page.
???

 

[mrbreezeet1]

Fluid level ok? If it is I would service it and put in a qt of trans-x. Stuff actually works sometimes.

I'm not familiar with trans-x?
I have heard lube guard recommended and also Lucas transfix what is the transex is it a thin solvent type of thing or is it a thick honey consistency?

 

[mrbreezeet1]

https://transgo.com/product-details/4t65-actuator-feed-limit/

States:
Easy, drop-in fix for worn actuator feed limit bores. on one part of the page, then states trans removal required on another part of the page.
???

I believe you have to pull the side cover which entails pulling the left strut and axle, and dropping the subframe.
Fortunately my transmission is not doing that, I do have the 1811 Max adap code, I am going to service the trans in the spring and install a shift kit at that time. I sure hope mine don't start staying in second gear, as I am not looking to drop the subframe and all that.