Ok. I have a rebuilt 4l60e. I had a friend of my dads do all the work and i trust his work without a doubt. I had the whole thing redone. New sun shell, corvette servo, master rebuild kit with red alto clutches, new band, & I had a new Trans Go shift kit installed which made it virtually a Manuel valve body. There is no automatic shifting at all. My problem is well for one the car will not shift into 4th at all. when you go from 3rd to forth there is no change in rpms and you dont feel the car shift. If you downshift from 4th to 3rd you can feel it a little bit. I don't know what would cause it.

My other issue is this motor and tranny assembly is all new. The motor has only 140 miles on it. So when i put my blower belt back on and you put the car in gear you can feel a vibration and also hear it. It sounds like a clunking sound. It only doesit with the blower belt on and when it is in gear. when the blower belt is off its fine. This kit calls for a check valve to be placed inline on the vaccum line for a boosted application, but even though my blower is runnimg i have not even come close to getting into boost.

I know these are odd issues but any help would be appreciated.

 

The clunking sound could be play in your rear end. Not sure about the rest of the issues. There are others on here that have more experience with blowers and stuff than me.

 

Well the noise is only there when the blower belt is on. So i dont think its the rearend. Im having a new spacer made for my Procharger so hopefully that takes care of the noise.

But what about the car not shifting into 4th gear. Remember this is a full manual 4l60. When you upshift from 3rd to 4th it doesnt change. could it be the servo

 

If you used the full manual tg kit you could have made and easy mistake with the 3-4 shift valve spring set up in the picture it has you install a spring there and looking it appears you leave the stock spring there to. This is incorrect and will cause no 4th check to see if you did this its an easy mistake because it does not say to discard the stock spring when you install the TG spring on the other side of the valve

 

I will talk to the my builder and see if thats what he did. If so do you think its possible to get that fixed by just dropping the pan or will i have to remove the tranny completly

 

He will only need to remove the valve body

 

thanks alot performabuilt

 

Your welcome and let us know if that was it and if so don't feel bad the instructions are not at all clear in that part

 

ok. I have another question. I have been noticing that if im in low and i am idleing through a parking lot real slow the transmission will start to fell like its low on transmission fluid. The fluid level is fine though. if i give it a little throttle it doesnt do it. It only does it in low. If i start out in second its fine

Any ideas

 

Ok Performabuilt, I removod the valvebody and sure enough the stock spring on the 3-4 shift valve was still in there so i removed it, but guess what the car still doesn't shift into overdrive I couldnt believe it. Do you have any other suggestions

 

1- do you have the electrical harness plugged in ?
2-when you were done there should have only been one spring the one from transgo in the 3-4 valve is that correct.
4-check the 4th servo that the teflon ring did not come off and check the 2nd servo and oring also since is its a corvette servo if the center ring is damaged it will vent fluid into the back side of the 4th servo and prevent apply.

 

Your talking about the main electrical connector on the top of the case. Im pretty sure it is but i will check again.

There is only one spring on the 3-4 shift valve. The stock spring is not in there any more.

Those other 2 things ill have to have a professional check. I think thats a little above my skill set, although i did do the work yesterday.

Do you have to remove the transmission to check the servos yout talking about

I have one other to explain what is going on. If im in P & i pull the shifter down into what would normally be D. The car goes into gear, Now i have never tried to pull out because I didnt want to burn anything up starting out in high gear. If im in 2nd & then shift to 3rd you can feel the car shift from 3rd to 4th you dont feel anything, but then if you go from 4th back to 3rd you can feel it downshift. Its almost like i have 2 3rd gears. Maybe i should take it out on the highway put it 4th gear and start to drive and see if its actually in 4th. But i dont understand when you start the car and pull the shifter to D it goes in gear so im assuming that is 4th gear what else would it be.

 

600hplt1sm;5666131]Your talking about the main electrical connector on the top of the case. Im pretty sure it is but i will check again.

With full manual this plug should not be plugged in unless all the solenoids except the TCC and PWm have been disconnected internally and the PCM programed to ignore the fact they are not there

There is only one spring on the 3-4 shift valve. The stock spring is not in there any more.

GOOD

Those other 2 things ill have to have a professional check. I think thats a little above my skill set, although i did do the work yesterday.

Do you have to remove the transmission to check the servos yout talking about

I have one other to explain what is going on. If im in P & i pull the shifter down into what would normally be D. The car goes into gear, Now i have never tried to pull out because I didnt want to burn anything up starting out in high gear. If im in 2nd & then shift to 3rd you can feel the car shift from 3rd to 4th you dont feel anything, but then if you go from 4th back to 3rd you can feel it downshift. Its almost like i have 2 3rd gears. Maybe i should take it out on the highway put it 4th gear and start to drive and see if its actually in 4th. But i dont understand when you start the car and pull the shifter to D it goes in gear so im assuming that is 4th gear what else would it be.[/quote]

tHE FEELING YOU ARE GETTING ON THE DOWNSHIFT FROM OD TO 3 IS THE OVERUN CLUTCH COMING ON AND IS NOT AND INDICATOR THAT YOU HAVE 4TH GEAR

 

Ok when i had the pan off yesterday most of the connectors are unpluged. The little selonoid at the front of the transmission was plugged in i guess that is for the lockup. but what is the PWM your reffering to. I had the programmer turn off the SES light for transmission codes i dont know if that was enough though. I only remember i thing being plugged in

If i unplug that main harness to see if that fixes it what is the worst case senerio that would happen.

 

There will be no issue with unplugging it to see if you have 4th now it will need to be plugged in to have lockup and dont worry about PWM I forgot transgo disables it anyway