The PCM should have record of any codes that have been thrown. I don't know if the AutoZone, or your fav auto store, has the right equipment to bring the codes up, but the dealer should be able to do it for free. Check their hours, the dealer by me is open til 8 two nights a week.
Slipping Transmission or Ignition Problem?
- Thread starter SugarHigh
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
97_edition
Full Access Members
Ok, thanks again Jimmy. When I get it back, even if it is not having issues (fingers crossed) I may do this just for some piece of mind that there is not any sensors or what have you, causing the shift problem.
DarrinBC
Full Access Members
I think you will find everyone in agreement that the filter doesn't get changed with a flush. That's WAY different than saying there is some valve that prevents fluid from flowing one way and not another that relates to the filter.
FYI, I specialize in these transmissions and have a STACK of filters for them within arms reach of me most of the day.
I can also tell you with complete certainty that a flush won't really "clean" the filter.
Not that a flush is bad, but it ain't all that.
Darrin
FYI, I specialize in these transmissions and have a STACK of filters for them within arms reach of me most of the day.
I can also tell you with complete certainty that a flush won't really "clean" the filter.
Not that a flush is bad, but it ain't all that.
Darrin
Why do you have so many filters since they are an item that does not need changing?
DarrinBC
Full Access Members
There are more reasons to do things with these transmissions other than routine service. How would you feel if I built a performance transmission for you and you found out that I installed a used filter in it? I don't think anyone woudl be happy with that.
So yes, I have a stack of them. Along with a whole lot of other parts that don't need changed for routine service.
But, if I do service a transmission, I take down the pan and clean everything up in there and crack the old filter open to see whats inside before I install a new filter and put it all back together. It's the only way you can see what is really going on.
Darrin
97_edition
Full Access Members
Thanks for the thoughts. I am having the tranny flushed so I will see if this takes care of the shifting issue. (This needs done anyways).
Also while talking to the mechanic, with servicing the transmission he told me I will not need to replace the transmission filter.I asked him why and he explained that there is a one way valve that allows the "dirty" transmission fluid in but not out (the filter traps dirt). With the "machine" hooked up it allows for the valve to be opened, which then allows the filter to be "cleaned", all dirt is flushed out of entire transmission including the filter. Has anyone ever heard of this?
Well I got my expy back last night. Wow, what a difference in shifting. After all of the comments regarding a transmission flush, I was a little weary that the flush wouldn't fix my shifting issue.
Original issue:When going about 55-60mph and giving it some gas about to 2500-3000K the transmission would stutter like it wanted to downshift but I wasn't going fast enough or give it enough gas to shift into passing gear. Or like it wouldn't "lock" into the lower gear. I am not a mechanic, my explanations may not make sense.
Well so far the truck shifts great! Even better then when I bought it several months ago. The mechanic also said there is not valves in the filter to open to clean (I misunderstood *sorry*). The filter is metal screen and the "additive" added to the transmission before the flush breaks down the sludge on the filter screen. Then running the pressurized flush through the trasmission and etc. the sludge is removed. I am a little wiser now.
Anyways the shifts seem very solid now, time will tell.
Thanks for your all of your thoughts and comments everyone.
97_edition
Full Access Members
Yep, that about sums it up.. I put 25 miles on it today driving it to work. On the way home there is steep hill with turns that my expy hates. I will push it harder to see how it performs. And if it breaks I know the flush didn't help it..
Last edited:
cbiii
Well-Known Member
what happened with this? I think ive got the same issue.
97_edition
Full Access Members
Fixed perfectlly, I have put another 5K on the transmission and it shifts better than before. Best $140 I have spend on the truck. I was really doubtful that the flush with the machine would help, but I was so wrong.
This maybe a different issue, but when i was towing a trailer this past weekend that my expy would not shift into 1st gear while going up a really steep hill. I had to almost stop half way up the hill then when I tramped on the gas again it just would bog down like it didn't have enough power to pull the trailer. I stopped manually shifted into 1st and it pulled the trailer the rest of the way up the hill without any problems. Just confused on why it wouldn't "automatically" shift into 1st while moving and giving it gas. I am very happy with the way it shifted when towing the fairly heavy trailer other than the very steep hill.
cbiii
Well-Known Member
hmm. im worried about changing the trans fluids at 175k or so if they havent been changed..who knows what that old fluids holding together!
NIGHTLIFEphantom
Member
Any updates to this thread as to what worked to fix the shuddering issue after given all this time?
The Swagonmaster
Well-Known Member
I was just going to add an idea of how to determine if the shudder was in the engine or the trans: take a vacuum gaugue with a small diameter hose attached to manifold vacuum and drive the car. If the vacuum reading changes when the shudder happens then the problem is in the engine, If it doesn't change then the problem is in the transmission. Quick and cheap. (yes I know this is an old post but this may help someone reading later)
Similar threads
