lance8693

I've replaced the 2-4 band installed vette servo I have reverse but still no 2nd r 4th Wut could it be

mrvedit

What is the servo end play?
(Press on the servo cover with a crow bar and estimate how much it moves by holding a ruler nearby. Spec is about 1/16 to 1/8". By 3/16" the band will begin to slip.)

If the servo end play is OK, a missing/torn servo seal or servo assembly error is the first thing I would look for.

lance8693

Ok Imma check the end play

lance8693

I have about 1/8

mrvedit

While on the high side, it should be OK.
No guarantee, but I would next remove the servo and look for something wrong with it.

Tell us more - did you rebuild the trans? Did you install a shift kit? Any valve body or separator plate mods or replacement?

lance8693

I have the trans go hd2 shift kit the trans already had the trans go separator plate I just replaced the band cuz I had no 2 or 4th

mrvedit

Ok. Also be sure the 1-2 accumulator is correctly built, e.g. that the piston isn't badly cracked. I don't think any of the HD2 mods to the VB, if incorrectly assembled, could cause your problem.

lance8693

Still no 2nd or 4th I double checked everything servo good New seals

mrvedit

Tell me more about the rebuild - did you rebuild the entire trans or just open it, remove the pump and replace the band?

Since you say you have the HD2 kit, have you tried installing one or more of the big gold servo washers?
I wonder if the far end of the band is not properly locked in.
1/8" end play is a lot for a brand new band.
I always suggest installing the servo and checking the end play before installing the pump; this lets you see the operation and ensure the far end of the band is properly locked in.

lance8693

It has both gold washers I just replaced the band

mrvedit

Sorry, but if you have 1/8" end play with both gold washers installed, I suspect more and more than the far end of the band is not anchored correctly.
It is anchored by a pin which is held in position under the separator plate. By removing the valve body, separator plate and anchor pin, you might be able to wiggle the band into position so that the anchor pin holds it when it is re-inserted.

Or I am wrong and/or missing something. I'd really like to get a pro's confirmation before you start tearing your trans apart and/or removing it.

lance8693

I made sure it was anchored when installing the band ..I pulled the pan when installing the servo to check the band play it was good

GMCSIERRA5.3

Have you checked to see if the 3rd exhaust accumalator(capsule)behind the servo is there?

lance8693

Yes.could it be the separator plate the trans had the trans go one but some of the checkball holes were elongated I tap them done on a vise when the shift kit was installed

mrvedit

In that case I would suggest starting with a new separator plate - get the Transgo 46-PLT-96 which is $20 at Summit Racing. Drill it first according to the included instructions for a V8 and then drill it further according to the HD2 instructions.
When you replace it, you will also have the opportunity to confirm that the band's anchor pin is solidly engaged.

lance8693

Is there a difference in pmw solenoid and 3-2 solenoid I was sold the pmw and its installed in the 3-2

mrvedit

In early 94-95 4L60E the 3-2 solenoid was a PWM. Beginning with '96 the 3-2 solenoid is an on/off solenoid and the TCC-PWM solenoid was added.

In short, sounds like you have the wrong 3-2 downshift solenoid in there.

lance8693

Seems like one side of the band is engaging

mrvedit

??? Meaning?
One side of the band is anchored with a pin.
The other side is engaged by the servo.
When the servo engages, it is very tight everywhere.

lance8693

The side the servo on I tore it back loose pin was in the hole ...it doesn't engage like the servo video by boxwrench on YouTube
Where ends of the band grab the drum