leonpiper69

iTrader: (3)

been driving my mustang for about a year and it pulls hard and smooth. so far its gone 12.40 w/ 1.72 60 foot. still have some tuning to do. but on the street when the converter locks up i get a NASTY shake. it almost feels like the tranny mount is broke and the back end of the trans is jumping up and down. but you can let off it, drop it down a gear and mash it and its smooooooth. just shakes when locked up but only under throttle cuz if your cruzing at like 70 and its locked up there is no vibration but if you try to accelerate then it shakes.


any ideas? im about to just reprogram it to never lock up.

leonpiper69

iTrader: (3)

3600 yank

tittan1500

iTrader: (8)

I havr the same problem 3600 vig. Pm me if you gind a solution i will do the same

jimmyblue

iTrader: (11)

I would guess this is more properly called "bucking" and a
problem with the engine tune at that load-point. Either
unlock earlier or make the motor like to lug better.

Though you might inspect tranny and motor mounts too.

Jays_SSZ28

iTrader: (2)

Whats your lock up mph, rear gear ratio and tire size?
If the rpm drops down below approx 1500 rpm it's going to act like a manual trans car going 30 mph in 5th gear. Drivetrain chatter.

The TCC Min and Max duty cycle should be set to 98 also.

01ssreda4

iTrader: (96)

This is a very good possibility, also a damaged converter jumps in my mind. Lock-up vibration is grounds for the converter to be opened and inspected then repaired. Unless its a stocker, then just chunk it in the trash.

Drivetrain chatter? No.