Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi, My name is ***** ***** for the delay.
I will do my best to assist you
does it have all 4 gears now?
does the engine light stay on?if so,can you give me the computer codes?
My name is ***** ***** French. My english can be bad. Sorry about that.
All gears are OK, no slipping in third or fourth.
No "Check Engine" light.
Bump or knock when shifting.
Before rebuild the transmission it was a smooth transmission, i can't feel the gear shifting.
Now, when shifting you feel and heard a knock. No smooth. It's like when you drive in 4Low...
there is nothing in the transmission to knock,,are you sure the u-joints are good in the drive shaft?,,also,make sure the rear end pinion gear is tight and doesnt have play
What to you tell u-joints ?
No problem with the rear end pinion
the u-joints in the drive shaft,,that connects the transmission to the rear end
does the it do this hot and cold?
The U-joints are goods.
I think my problem come from a bad control of pressure.
Because, the shifting are very fast like a DSG on Volkswagen / Audi cars (you can see the RPM shut down very fast, there is no slip), but hard like Race transmission.
Does i must install shift kit, or valve body upgrade ?
sense it is shifting quickly,,this sounds like maybe a bad throttle possitions sensor,,the 03 year model was the first throttle actuator control [tac] unit,,[it didnt have a throttle cable to the throttle and the tps was built into the tac].
lets try something,,remove the intake air duct and clean the throttle body with carb cleaner,sometimes the throttle body will get dirty and cause a bad tac reading..
i would think you should be getting a code,if cleaning the throttle body doesnt help..replace the pressure switch again
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i will try to replace the pressure switch, and come back to you when i receive it ( about 3 days )
See you later
clean the throttle body first,,a dirty throttle body can do this
The throttle body is clean.
If i must replace the TB, i have a new throttle body not installed, because i don't know if programing is necessary.
I buy all parts on Rockauto, and receive them 3 days after. I will test the pressure switch. I have never replace this parts before.
ok..there is no need to reprogram the TB..or the transmission after the rebuild,,
again,this is providing you are sure the transmission is rebuilt correctly
I have received all parts and change all :
- New TB
- New TCC solenoid
- New Pressure switch
- New Transgo shift kit (orange box)
Now, when cold the transmission is smooth and no harsh shifting. But after driving 15 miles, the harsh shifting come back.
Any help please.
still no engine light?
was a shift kit installed during the rebuild?
No engine light.
Shift kit installed last week. Because harsh shifting after rebuild.
After replacing all parts and shift kit. The transmission is smooth only during 15 miles.
After 15 miles driving, harsh shifting.
ok..sense there is no engine light and from the way you explain,,
you must know that the shift jit will make it shift firmer and may be a little harsh,,but,,sense you say it only does this after it gets warm,it could have a small internal pressure leak from a seal or sealing ring inside the transmission,the fluid is much thicker when cold,when you drive it a little while,the fluid gets hot and this,thus may be loosing a little pressure after the fluid gets hot and thin..
you may want to have your dealer run a update on the pcm[computer] but the problem may be internal.
again,the shift kit will make it shift firmer than stock