91 R/T won't shift

**IPD** · 01-16-2011, 04:12 PM

if it only happens ~60mph or higher, it's not loose lugs. you'd notice that at 5mph.

**mcshooter** · 01-16-2011, 07:24 PM

its got be out of balance , how old are the tires? i have had a lot of tires when they get mileage start to vibrate at speed, warped rotors is a old wives tale

**IPD** · 01-16-2011, 07:49 PM

"warped rotors" is bullcrap. they might be heat-treated due to excessive braking; but that would only produce vibration during stops--not at speed.

**stealthee** · 01-16-2011, 08:03 PM

Rotors can be warped by overtightening the wheels. That is fact. The warped rotor by excessive braking is the wives tale.

And my comment about overtightening is a seperate comment from his vibration issue. I just noted its bad.

**DanEboy5** · 01-17-2011, 01:53 AM

I don't know how old the tires are. The tread is awesome on all four. However, as I mentioned earlier I have a hound from every town! They are all the same size and I checked to see if any weights had popped off and all is good. I hate the R/T wheels! My wife wants me to hold off on putting new tires on my R/T TT wheels until spring. So, I guess I will just have them balanced to make sure.

It only vibrates at 60+mph...so my guess is the wheels/tires out of balance or a broken belt.

**steve** · 01-17-2011, 09:22 PM

Make sure to change the caps in the working TCU if they are original or it won't be a working TCU for long.
Unlike the ECUs, when the 47uf cap by the voltage regulator pass transistor leaks there is a very good chance the regulator will fail and dump 12v on the 5v buss to all the chips blowing them.

**IPD** · 01-17-2011, 09:29 PM

^is the the genius whose advice i've been warned about?

**stealthee** · 01-17-2011, 09:45 PM

No, the Steve you've been warned about is Steve68.

**DanEboy5** · 01-18-2011, 01:15 AM

Yeah I plan on having the third tcu rebuilt after I get my other two back. The original one was in such bad repair no way a novice like me could ever touch it and reserect it.