mis-shifting in gt? is this possible?

[DrunkenTiger]

I've heard of people mis-shifting and damaging their engines on their GT-S. However is there a possibility you can do the same type of damage with mis-shift in a 5 speed Gt? I thought only gears grinded if you shifted wrong? Thanks in advance.

[EndlessShock]

Yeah its possible... There was a thread about that a while back ...

[Griffin]

It is possible to mis-shift and damage any interference (non freewheeling) engine with a manual tranny.

Griffin

[GTS LAID]

cant you damage a freewheeling too if you get a nice 5 2 instead of 5 4 in a 5 spd tranny setup... even though the pistons wont slap anything they can do damage to the crank and the valve retainer springs might not even be able to hold that much oscillation... its just conjecture...

[Griffin]

Originally posted by GTS LAID
cant you damage a freewheeling too if you get a nice 5 2 instead of 5 4 in a 5 spd tranny setup... even though the pistons wont slap anything they can do damage to the crank and the valve retainer springs might not even be able to hold that much oscillation... its just conjecture...

well sure - if your determined you can bust just about anything :) the damage just isn't likely to be nearly as catostrophic. Probably could blow the oil pump, spin a bearing, snap a valve spring, all kinds of fun stuff. But judging by the fact that you don't generally hear about it with non-interference motors as a big problem, I'd have to say that they are a lot less sensitive.

Just an interesting tidbit / food for thought on why Celicas might be more prone to misshift damage:

1- Shift pattern on 00 & 01 MY
2- High lift cam - sends valves deeper into cylinder
3- High compression - pistons are close to valves to begin with
4- high revving nature of engine- people tend to shift at way high RPMs
5- Physics of a front wheel drive car - when you break (or downshift) it throws the vast majority (roughly 80%) of the weight / load onto the front wheels. Therefore the only thing likely to save your engine (breaking traction) is unlikely to happen.

Griffin