Slow 1-2 Shift. Cause And Fix

[Blackrider]

Hey for about 6 month I had been getting a really bad shift into second. I even Added DHP and it was still no help.

When you hammer on it the car will shift back to 4200 RPM but it will just hang there for 1-3 second then you would feel a Thud as the band engaged and the car would start pulling again.

it got worse 2 night ago it would diengage at 6000 he car would stop pulling but the engine would rev another 200 RPM to about 6200 before it would kick back to 4200 then it wold hang then you would feel the band engaging. Also this would ONLY happen when the engine is warm, it was fine when it was cold.

The solution. I think it was last year GM Release an update for the 4t40, 4T45, and 4T45-E. there was an update on the shift valve, and valvebody spacer plate. Also well it was apart the Pressure control solinid was replaced. After the 5H job, the car was still a bit sliggish, but with more WOT shifts it got better and better, now the shift is perfect. Problem solved.

I dont have a Video of how it used to shift, but here is how it shifts about 100KM after the install.
http://members.shaw.ca/jordie_robb/P1030126.MOV
Car is kind of slow due to knock, I just out in 5 bucks in gas so my Pup gas 111 Race gas mix was a bit lean.

Here are the Pics of the install had to remove the crossmeber, take the sideplate off the tranny, remove the pump and valve body.
http://www.domesticcrew.com/colin/j...nsrepairjordie/
Pressure control solenoid, its the big one.
http://www.domesticcrew.com/colin/jordie/transrepairjordie/jordie05.jpg
updated shift valve bottom old one top. The new one does not have the bleeder holes.
http://www.domesticcrew.com/colin/jordie/transrepairjordie/jordie09.jpg
Crossmember
http://www.domesticcrew.com/colin/jordie/transrepairjordie/jordie15.jpg

And the Crazyness!
http://www.domesticcrew.com/colin/jordie/transrepairjordie/jordie08.jpg

This is just a Little heads up to anyone elce having this problem.

I'm very lucky that have a Buddy who is a GM tech and he did the work for me at the dealer, it took him from 9:30AM untill 2PM to get it doen. Its not a cheap job if you go to the dealer.

Jordie

[FormulaNERD]

great post, thanks been having this EXACT problem for 2 months.

when my car is warm its alot worse than in your video though.

[Blackrider]

Originally posted by FormulaNERD@Aug 15 2004, 03:22 PM
great post, thanks been having this EXACT problem for 2 months.

when my car is warm its alot worse than in your video though.
The video I posted is of how good its shifting now lol

[FormulaNERD]

hahahha... ok. i was beginning to wonder.

i'm gonna get a video of how my car is shifting, and let me know if its similar to yours. it'll be a couple of hours...

[FormulaNERD]

mine is a 99, you said that it was from a gm update? or the gm update fixed the older 4t45-e's?

also i understand the dismantling procedure, but what exactly had to be replaced? other than the shift control valve

also, when warm and slipping, at WOT from dead stop, would your front end hop a little instead squealin the tires? i could still hear them spin, but it hops sometimes.... but usually when it's warm, i'm easy on it... cause i figured the tranny was shot.

[Blackrider]

Originally posted by FormulaNERD@Aug 15 2004, 03:44 PM
mine is a 99, you said that it was from a gm update? or the gm update fixed the older 4t45-e's?

also i understand the dismantling procedure, but what exactly had to be replaced?

also, when warm and slipping, at WOT from dead stop, would your front end hop a little instead squealin the tires? i could still hear them spin, but it hops sometimes.... but usually when it's warm, i'm easy on it... cause i figured the tranny was shot.
Well I though it was doing that I mean at first I though it was slipping, but it was just my coopers not making any noise, the car is solid in gears, With the type of burnout I can do there is not way its slipping lol, i'll get a vid of that tonight.

The UP is from GM, Its a kit, With the Valve Body spacer and Shift Valve, also we put in a new Pressure controle Solinoid.

[FormulaNERD]

Originally posted by Blackrider+Aug 15 2004, 03:49 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (Blackrider @ Aug 15 2004, 03:49 PM)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-FormulaNERD@Aug 15 2004, 03:44 PM
mine is a 99, you said that it was from a gm update? or the gm update fixed the older 4t45-e's?

also i understand the dismantling procedure, but what exactly had to be replaced?

also, when warm and slipping, at WOT from dead stop, would your front end hop a little instead squealin the tires? i could still hear them spin, but it hops sometimes.... but usually when it's warm, i'm easy on it... cause i figured the tranny was shot.
Well I though it was doing that I mean at first I though it was slipping, but it was just my coopers not making any noise, the car is solid in gears, With the type of burnout I can do there is not way its slipping lol, i'll get a vid of that tnoght. [/b][/quote]
no... i mean BEFORE you fixed it. did your car want to hop (when hot) and taking off fast

[Blackrider]

Originally posted by FormulaNERD@Aug 15 2004, 03:42 PM
hahahha... ok. i was beginning to wonder.

i'm gonna get a video of how my car is shifting, and let me know if its similar to yours. it'll be a couple of hours...
Yeah man for sure, i'm at work till 430 CST I'll look when i get home, Dman work computers!

[Blackrider]

Originally posted by FormulaNERD+Aug 15 2004, 03:51 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (FormulaNERD @ Aug 15 2004, 03:51 PM)</td></tr><tr><td id='QUOTE'> Originally posted by Blackrider@Aug 15 2004, 03:49 PM
<!--QuoteBegin-FormulaNERD@Aug 15 2004, 03:44 PM
mine is a 99, you said that it was from a gm update? or the gm update fixed the older 4t45-e's?

also i understand the dismantling procedure, but what exactly had to be replaced?

also, when warm and slipping, at WOT from dead stop, would your front end hop a little instead squealin the tires? i could still hear them spin, but it hops sometimes.... but usually when it's warm, i'm easy on it... cause i figured the tranny was shot.
Well I though it was doing that I mean at first I though it was slipping, but it was just my coopers not making any noise, the car is solid in gears, With the type of burnout I can do there is not way its slipping lol, i'll get a vid of that tnoght.
no... i mean BEFORE you fixed it. did your car want to hop (when hot) and taking off fast [/b][/quote]
Nope it would get out of the hole just fine.

[flalero]

I was wondering if you had link or any specific info on this upgrade or where I can purchase the kit.

[Blackrider]

Originally posted by flalero@Aug 19 2004, 01:59 PM
I was wondering if you had link or any specific info on this upgrade or where I can purchase the kit.
Sorry dood no link But for the Valve its just 2 Bleeder holes they removed, and the valvebody plate has been updated. You can get it from you GM dealer. its NOT an easy install Its a total of 9H from GM

[theirishgonzo]

will this be covered under warentee?

[Blackrider]

Originally posted by theirishgonzo@Aug 19 2004, 06:01 PM
will this be covered under warentee?
It should provided you still have one.

[FormulaNERD]

the valve looks a little beefier in the pics too, in addition to the bleeder holes removed...

[Blackrider]

Originally posted by FormulaNERD@Aug 19 2004, 08:56 PM
the valve looks a little beefier in the pics too, in addition to the bleeder holes removed...
they where pretty much the same - the bleeder holes remeber the old one has been sitting in my tranny for 125,000Km