ziggy89

allright allright I know its all been said before so installed the sonnax tv plunger and sleeve kit 77966-94mk. supposed to eliminate the 4-3 downshift at wide open throttle. problem is it still down shifts. any thoughts on this? could the tv cable still be adjusted wrong?

jmd

iTrader: (4)

I can't speak for the Sonnax but some of the a/m valves still allow the downshift.
Try: https://www.thirdgen.org/forums/tran...wot-3-4-a.html

ziggy89

yeah ive seen the modification was hoping to avoid it. the new sleeve was supposed to cure it.

RBob

iTrader: (1)

From their website:

http://www.sonnax.com/parts/2513-thr...nger-valve-kit

"Prevents forced 4-3 kickdown below three-quarter throttle"

The B-Body fix kit (discontinued) or the stock sleeve modified is the way to go.

RBob.

Reid Fleming

iTrader: (2)

With the modified sleeve, I could do a 4-3 shift at anything below 85 mph. Once you get past that, it would stay in O/D. So yes, you can still make a 4-3 shift when you're on the highway and want to pass somebody.

Pro Built Automatics

Yes, that is correct. Depending on the rear end gear ratio, will mostly determine when the 4-3 downshift goes away. 80 - 85 mph seems to be the numbers I have seen when it stops downshifting using the modified TV plunger sleeve.

ziggy89

that's good to know. wonder how it would be with 4.11 vs your 3.27 gears. and is it going to try and make a wot 3/4 upshift above 80-85?

Pro Built Automatics

With the lower the gears 3.73's, 4.11's, 4.56's the lower the speed to get 3-4 WOT shifts and eliminate 4-3 downshifts when blocking the 4-3 passages in the TV plunger sleeve or the aftermarket sleeve.