Can't get rid of harsh 1-2 shift in 4l60e

billr

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Sorry. I can't open that DOCX format. Can you send it as PDF?
 

billr

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Well, I read that and understand why there is some confusion about when PWM started. The originals had on/off control; of the TCC, and they stamped "PWM" on the case when TCC control was changed to PWM. I think I read this in the ATSG manual, too, but ignored it because we are focused on the shifting. I still feel the important controls for shifting, the PCS and two solenoids, have always been PWM; regardless of how the trans case is marked. I am certainly no expert here, may be wrong. Read everything you can find on the PWM subject, hope to find a general agreement in most info.

That Valvoline ATF is a DEX6 formulation, not suitable for my "Hail Mary" try of DEX3.

I may be absent/slow here for a while. My wife and I are both sick with flu.
 

rhino

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billr,
I'm sorry you two are under the weather, my wife and I have managed to steer clear of sickness the last couple of years. This is in spite of the rest of our family and their families coming down with COVID, some of them twice! Don't worry about responding, I have lots of work to do and numbers to get.

But if you could explain your comment on Valvoline Max Life. Are you saying you don't think it's a suitable oil and I should try something else?

Dave
 

billr

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The Valvoline is probably a great DEX6 ATF, but some older trans designs don't work as well with DEX6 as they do with the DEX3 they were designed for. I'm sure the DEX6 is touted to have all the performance benefits of DEX3 and more; but I have heard that is not always true Like I said, changing to DEX3 is a "Hail Mary" play and probably won't work, but you could leave the DEX3 in there and save the DEX6 for future use, if it is reasonably clean coming out of the trans.
 

bp042665

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ok the pwm came into effect late 96 early 97 as for the max life it is fine in this 94 trans if they build it like i do the are using raybestos or borg warner clutches and they like dex IV or dex III we need to see what the pcs amp is to make sure it is working right
 

rhino

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I believe he did use Raybestos frictions and measuring resistance/current on the PCS circuit is on my list. Thanks for the comments.

Dave
 
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