Hi
I just found this website and have been reading many posts. Some sound similar to my problem but not quite. I have a 99 chevy blazer LS w/117,000
no check engine light, Transmission fluid a little over full, fluid didn't smell burnt, and mechanic didn't see any leaks. When I'm sitting at a light, stop sign or have to stop for any reason. When I start to accelarate the tachometer jumps to 2 or 3 rpms faster than it should. It also takes longer at times for the tachometer to come down. It doesn't do it every time or everyday. It will sit at a certain rpm and flucuate or pause there for maybe 30 to 60 seconds sometimes longer. I had someone at autozone check for codes there were no codes. Went to a shop he drove it around suggested a transmission flush which a machine would do it. He said it would cost around a $150. Does that price sound reasonable? Is there anything else that could cause this? Or if flushing transmission doesn't work any suggestions? Any other suggestions would be appreciated and helpful thanks

I would get a trans shop to do it and they can also see if the torque converter is slipping. A pan drop and filter is a messy job and gets about 5 qts of the 12 (rest in conv). A full flush is the new fade but again if its in the pan like the solenoid a trans shop is best.

Hi
I just found this website and have been reading many posts. Some sound similar to my problem but not quite. I have a 99 chevy blazer LS w/117,000
no check engine light, Transmission fluid a little over full, fluid didn't smell burnt, and mechanic didn't see any leaks. When I'm sitting at a light, stop sign or have to stop for any reason. When I start to accelarate the tachometer jumps to 2 or 3 rpms faster than it should. It also takes longer at times for the tachometer to come down. It doesn't do it every time or everyday. It will sit at a certain rpm and flucuate or pause there for maybe 30 to 60 seconds sometimes longer. I had someone at autozone check for codes there were no codes. Went to a shop he drove it around suggested a transmission flush which a machine would do it. He said it would cost around a $150. Does that price sound reasonable? Is there anything else that could cause this? Or if flushing transmission doesn't work any suggestions? Any other suggestions would be appreciated and helpful thanks


I would hold on the transmission flush.
Are you sure it is actual transmission slippage and not just the tach or engine running acting up.
Spend that flushing money on getting the transmission checked on a good transmission and engine running capable scanner.
If a transmission problem or slippage it will show up on a good transmission scanner.
If the transmission needs serviced just do a filter change.

To Flush or not To Flush ?
Just like Kenney Rodgers said you have got to know when to fold and when to hold.
If the fluid has high mileage 100K or over or is real dirty you had better hold.
On a trans that has had good regular service at 50K or sooner a flush is good.
But be ware of jiffie/quick/wallmart /fast lubes that offer power and fast flushes.
They have abused and over rated the trans flush.
They have a habit of using one fit all fluid out of the same barrel that fits all.
They just throw in a bottle of additive to make it fit all. Or worse they pitch in a bottle of cleaner or dope in it that can do more harm than good. And will tell you the filter does not need changing with a flush.
Just remember that all new fluid makes a high detergent cleaner that will break loose all varnish and dirt and grit in the trans and drop it in valve body and solenoids.
Always change the filter and go easy on or use no dope and cleaner.
Adjust/check the bands and linkage on the trans that have bands and adjustments.
Always use the trans fluid the trans/manf calls for. And be aware that some manf have changed the type of fluid specs since the trans was manf.
Some fords have changed the specs and a lot of cry/dodge have gone to the newer type of fluid on their trans service.
Also some fords have tsb’s and require a total complete trans flush to cure trans shifting problems. Some as low as 30K
If a person does not have a flush machine a old 5 gallon bucket and a couple of rubber hoses to connect to the cooler lines and with the other end in the bucket will make a good flush machine. Just put the hoses in the bucket and start the engine and start pouring fluid into the trans until the fluid running into the bucket gets good and clean.
It usually takes 16-20 qts. To get a good flush.
Flush or No flush always service the trans filter and trans on a good regular basic.
People that keep the serviced have a lot less trans problems.