Transgo TF2 Shift Problems

[1973_Cuda]

I have a 1973 Cuda 340 727 trans. with TF2 kit.

The problem I am having has to do with 1-2 shift point on WOT. I hit 6500 rpm before it shifts to 2nd. Normal driving is perfect. I have adjusted the throttle kickdown linkage for 1-2 at 10mph and 2-3 at about 25mph. The bands are adjusted correctly, fluid level proper, I did everything the kit instructions required.  Is it possible the throttle pressure valve in the valve body could cause this? I know when I was doing the kit the retainer on the TP valve was set 6 turns in but transgo wants the retainer flush all the way out. I am just trying to figure this out and could use some help, thanks in advance!

Mike

[tactransman]

You mean the pressure regulator valve adjustment,right? If so,yes it could make it worse.

Did you grind the TV valve stem off as in the instructions? (step 3 in these OD instructions)

[1973_Cuda]

Yes, sorry, I meant pressure regulator valve. Yes I did grind the throttle valve end to 9/32". I installed the yellow spring on the throttle valve and blue spring on PR valve. Then I backed off the spring seat 6 turns to make flush against the retainer. I am convinced this is were my problem may lie. They say this is correct for streetable cars but I don't know. I am not sure how this affects the line pressure and shifting under WOT.

[tactransman]

I think you need to back off the kickdown adjustment more.

[1973_Cuda]

I have tried shortening and lengthening and does change shift points but not under WOT. ( still goes to 6500 rpm from 1-2) I have the single rod type of throttle kickdown, is there any special adjustment to make at the tranny. I tried setting with throttle wide open and rod all the way back at tranny, and I tried setting with rod all the way forward and throttle at rest ( choke off ).  I am starting to think I might not be getting full travel from front to back at tranny connection.

[1973_Cuda]

I just went and looked at the throttle linkage and everything seems ok. I have a holley 650 VS with the chrysler throttle extension lever P/N 20-7. There is not much else too look at here as I am getting response shortening and lengthing the rod as far as shift points under normal driving. Still no effect on the 1-2 shift. I am at a loss.

[1973_Cuda]

Should I be running dex3 or type f fluid? I have dex3 right now.

[1973_Cuda]

I am also not getting positve response from the shifter from 1-2 and 2-3 when manually shifting. There is a slight delay with both shifts.

[tactransman]

Dex 3 is fine. Maybe you just need to adjust your shifter then.

[1973_Cuda]

Adjusted shifter and working perfectly. Checked travel of throttle lever at tranny and goes front to back on stops correctly. Why the delay in upshift from 1-2? I'm baffled.

[tactransman]

Did you grind the 1-2 shift valve gov plug?

[1973_Cuda]

No, I didn't want the shift command feature.

[tactransman]

OK,that would have made it worse. Let me think about this for a while and I will get back to you.

[1973_Cuda]

Thanks for your help, I appreciate it. It's funny because everything works perfectly for normal driving.

[tactransman]

OK,I am thinking you could try clipping a 1/2 coil off the 1-2 shift valve spring.