Hello, my transmission seems to not shift very well from 1st to 2nd when its very cold out. When its shifting, it seems like its lagging or having a hard time going into 2nd.Its like the rpms are going up and down and its really trying and then it shifts. It only does this for a little bit until it warms up and then it seems to shift fine.By the way the temp is around -25 or colder when it does this.I changed the fluid and filter in the fall and recently checked it and it looks fine.I dont drive the truck a whole lot. Basically it sits for most of the time when the warm weather comes as i drive my camaro most of the time.I only put around 5000 km a year if that. Any ideas?


2003 blazer ls 4x4
88,000 km,stock

 

Its an automatic transmission.

 

Symptom:
1-2 Shift shudder at WOT or delayed / abnormal 1-2 shift
Cause:
1-2 accumulator piston cracked or stuck cocked in the bore
Repair:
A pan drop and inspection of the 1-2 accumulator piston should be done.

 

Thanks for the quick reply. I will see if my mechanic freind can look into this for me.

 

where do ya find these things

 

He's got people!

No, seriously he has books up the wazoo! Wish I had his library

 

It is all in where you look! LOL

 

Well the temp is much warmer now and it doesnt do it anymore. I guess thats a good sign.

 

lol i can tell, he has like all the answers to every thing

 

I am hearing a whine from under my '03 blaze (4wd). It gets louder as I go faster (above 40 mph). the sound disappears if I put the vehicle in neutral. There is no sound in 1st gear. It begins in 2nd gear on up. Shifting seems fine, and fluid level is correct. It is getting worse by the day.. Any ideas?