Last post on Apr 12, 2013 at 10:12 AM
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Chevrolet Blazer, Transmission, SUV
#133 of 382 Trans shifts hard between first and second
Feb 04, 2008 (2:54 pm)
I have a 1998 chevy blazer with 130000 miles, a while back (15000 miles ago)I changed my trans pan fluid and filter due to the same problem, and this fixed the problem until now, I was reading the earlier entries, do you think I should replace my converter fluid, will this help the problem, or should I replace the Tcc solenoid.
The problem occurs between 25-35 mph when it shifts into second, it gets all gutless acting like a slip, then when it does shift, it shifts fairly hard, 10 times harder than it used to even under hard acceleration, and if i stay in the 30-45 mph range it acts like it wants to upshift into third creating a lack of power problem cause the rpms are too low.
Does anyone have any Idea what this could possibly be?
#134 of 382 Re: Chevy Blazer 2000 - Transmission problems [foxracer1]
Feb 04, 2008 (6:56 pm)
Well brian..it depends on the engine size and a few other factors. Typically a full size v-8 trucks will have a lower stall converter, around 14 to 1700. rule of thumb is the smaller the engine the higher the stall. if you have a 6 cyl then the typical stall is from 18 to round 2000...4 cyl are a little higher..2 to 2300. If you put a converter that is only a 100-200 stall difference you probably wounldn't notice much difference. 5- 600..yea you could tell...but it wouldn't be the end of the world.
#135 of 382 Chevy Blazer 2002 - Interesting problem 4L60E
Feb 05, 2008 (8:49 pm)
How about this one? Transmission shifts great. Not too harsh, no slippage, shifts up, shifts down, no problem. Engages as soon as shifted into drive or reverse. No weird noises, no warning lights.
But wind it up in first or second gear and around 4500rpm ... Goes complete slip, as in shifted to neutral. Let off the gas, transmission hooks up and all is normal. The one clue I see is the fluid looks like it foamed.
Now, I just bought this car, and it does have a 12/12K warranty that covers the tranny if it is toast. But someone has recently service the fluid, and I am thinking:
1. Wrong fluid. Should be Dexron III, but no way of knowing what is in there.
2. Wrong filter/dirty filter
3. (and I am leaning toward this one) Whoever put the filter in didn't notice the o-ring missing. Under high suction this would really pick up air and foam the fluid.
Opinions are welcome!
Forgot to add, records show regular service, Blazer has 62K miles.
#136 of 382 Re: where do i start ,transmission leaks 1986 chev blazer [larenz71]
Feb 06, 2008 (7:45 pm)
Mine was leaking too. Is it the actual transmission or the pan. If its the pan check the gasket it might be worn down.
#137 of 382 Re: Chevy Blazer 2002 - Interesting problem 4L60E [jlflemmons]
Feb 07, 2008 (8:04 am)
Dealer checked for codes, nothing there. So, dumped the programming from the PCM and did a fresh upload with all the current updates from GM. Shifting is much crisper, but the engine went into rev limit just as the tranny shifts out of first under WOT. I think I will go ahead and do the fluid and filter change this weekend and go from there. The dealer checked the extended warranty and says if the tranny needs a rebuild, it is covered. Nice to have that safety net!
#138 of 382 Re: Chevy Blazer 2002 - Interesting problem 4L60E [jlflemmons]
Feb 07, 2008 (9:25 pm)
All is happy with the tranny. Dropped the pan and found only the typical fine residue. The pan had not been off before, and the original filter was still there. One thing I found interesting was I expected to only need five quarts to refill. I know not to over fill, so I checked, rechecked, and checked again with the transmission warmed up and idling in park, and it took an extra 1/2 quart to put the level in the hash marks.
The only thing I could think of was that when I was under it, I had it way up on jack stands and may have gotten some of the fluid from the TC. Whatever, it shifts smooth as butter, with no slipping.
#139 of 382 Re: Chevy Blazer 2002 - Interesting problem 4L60E [jlflemmons]
Feb 09, 2008 (5:52 pm)
Well glad it worked out for you...you were probably right..a partially restricted filter, low fluid, missing seals...could have been any of them.
#140 of 382 Re: Chevy Blazer 2002 - Interesting problem 4L60E [rhtrans]
Feb 09, 2008 (7:14 pm)
Ah, but with the transmission holding in gear, a new problem was uncovered, and resolved this morning. I will post symptom and solution in another thread. Engine related.
#141 of 382 Re: 97 jimmy will not shift automatically [my97jimmy]
Feb 10, 2008 (12:39 pm)
Keith, Your message was very useful and timely for me. My 99 Blazer had been experiencing shifting irregularities for several weeks, and today the problem became severe... when starting in 'Drive' position, the car would start out in 3rd or 4th gear, and continued to do so after repeated stops/starts. I assumed the worst, but did a Google search, found your message (first on the list), disconnected the battery, and 15 minutes later the transmission was operating perfectly.
Thanks for the tip
#142 of 382 Re: 97 jimmy will not shift automatically [motoroller]
Feb 10, 2008 (1:47 pm)
Glad it helped you with your transmission problem. It's amazing that it was that simple, wasn't it?