2G What happens when you mis-shift/moneyshift ?

[Ceezdsm99]

So ever since I got my gst 5 months ago my 5th gear has always been hard to get into, I would have to give it extra umphf.

I accidentally mis-shifted from 4th to 3rd at around 70 mph. Instantly my rpm’s went to redline and I instantly pressed the clutch to save the shift. After this I smell like what is tranny fluid, and my car starts loosing power and bogging through gears. All gears still go in smoothly, no grinds or pop outs but when I go through gears now the car boggs out. And boost kiks in prematurely around 2900 rpm’s when I step on it.

The engine was fine it had oil and no overheating. No CELS. I think maybe I blew something in my tranny? I looked for boost leaks but didn’t see any … any help will be greatly appreciated.

 

[KCDsmDude]

Not sure shifting back into 3rd at 70 mph would cause any issues, that's well within that gear.

Had you been at the top of 4th, and then shifted back into 3rd, that would be a money shift. Usually happens 1-2-1 tho.

 

[pauleyman]

Nothing should have happened at that speed. Car shouldnt have even hit redline. 6k maybe but not redline. I would check your mechanical timing just to be safe. To answer your question if you truly miss a critical shift outside of the gear rpm range the car will exceed redline and unknown things can happen to valvetrain, pistons etc.

 

[DiSeM]

Make sure all of your charge pipe couplers are snug and not loose, you might have lost one causing it to bog like it is.

 

[Ceezdsm99]

Not sure shifting back into 3rd at 70 mph would cause any issues, that's well within that gear.

Had you been at the top of 4th, and then shifted back into 3rd, that would be a money shift. Usually happens 1-2-1 tho.

No yes I was at the top of 4th gear and went into 3rd , and since I have no clutch accumalator it went into that gear hard , it was definitely a money shift but I didn’t hear anything break I’ll check out my couplers and any possible leaks .could it also be my turbo ? I know mine was on its way out . It still boostes tho .

Nothing should have happened at that speed. Car shouldnt have even hit redline. 6k maybe but not redline. I would check your mechanical timing just to be safe. To answer your question if you truly miss a critical shift outside of the gear rpm range the car will exceed redline and unknown things can happen to valvetrain, pistons etc.

It redlined almost toward 9 k I think before I saved it ,I’ll try and get a video up .. could the pistons be damaged even tho it goes into gears , and no cels? Or misfire codes

Nothing should have happened at that speed. Car shouldnt have even hit redline. 6k maybe but not redline. I would check your mechanical timing just to be safe. To answer your question if you truly miss a critical shift outside of the gear rpm range the car will exceed redline and unknown things can happen to valvetrain, pistons etc.

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[pauleyman]

You should probably do a leakdown test. Possible valvetrain damage and bent a valve or two. That's just one possibility. Rule out what's easy first. Timing, then leakdown. Check and make sure you didn't pop a rocker off. Even a visual inspection under the valve cover may expose an issue.

 

[CrackedDSM]

I’ve seen it range from nothing happen to a rocker being flung legit through the VC(leaving a hole in the cover and a dent in the hood ) so definitely pull the VC and inspect the inside. You’ll probably find a rocker laying somewhere. Wiggle them all by hand and see if any are loose enough to come off if none are outright off the spring.

 

[Ceezdsm99]

I’ve seen it range from nothing happen to a rocker being flung legit through the VC(leaving a hole in the cover and a dent in the hood ) so definitely pull the VC and inspect the inside. You’ll probably find a rocker laying somewhere. Wiggle them all by hand and see if any are loose enough to come off if none are outright off the spring.

I see , so you think it would be an engine problem ,I would think that it would be a transmission problem ? I have no misfiring codes or any CELs at all …

 

[CrackedDSM]

I see , so you think it would be an engine problem ,I would think that it would be a transmission problem ? I have no misfiring codes or any CELs at all …

I can’t say for sure. Neither can anyone with any real authority. But honestly I’d be more inclined to look at the head/valve train first. Matt(guy I mentioned above) money shifted and Link logged an rpm that touched 16k when the rocker decided “I wanna be an astronaut!” and noped out of the head. It can happen quick. Not saying this happened to you, but it wouldn’t hurt to check everything. But I’d focus more on the engine first like I said.

 

[Ceezdsm99]

I can’t say for sure. Neither can anyone with any real authority. But honestly I’d be more inclined to look at the head/valve train first. Matt(guy I mentioned above) money shifted and Link logged an rpm that touched 16k when the rocker took its trip to the moon. It can happen quick. Not saying this happened to you, but it wouldn’t hurt to check everything. But I’d focus more on the engine first like I said.

I see on its trip to the moon but then it hit the firmament , but if that did happen wouldn’t I get some CEL codes , the car starts right up just fine and revs fine I hear no knocking except for my Tob ticking unless I press the clutch …

 

[pauleyman]

It revs in neutral fine but won't drive?

 

[Ceezdsm99]

It revs in neutral fine but won't drive?

It revs fine in neutral , and it goes through all gears fine … the clutch engages and the gears go in , it starts bogging out through gears , spoke to a mechanic he said it could be a hose leaking or escaping air Because of when i redlined it all the compression going through the engine , that or my piston rings maybe ? Mightve pulled a Buster .. but I’m hoping it’s just a leak somewhere

 

[pauleyman]

It revs fine in neutral , and it goes through all gears fine … the clutch engages and the gears go in , it starts bogging out through gears , spoke to a mechanic he said it could be a hose leaking or escaping air Because of when i redlined it all the compression going through the engine , that or my piston rings maybe ? Mightve pulled a Buster .. but I’m hoping it’s just a leak somewhere

Did you at least follow the piping? This sounds like a boost leak.

 

[DSMPT]

If 70mph in 4th was true, probably it happened somewhere around 4000 rpm, not that high RPM. If it happened at high RPM and if you really did a money-shift, that would usually cause a lot of terrible damages, such as bent valves, broken rocker arms/lifters, cracked pistons/head/front case/timing belt sprockets, cut timing belt, snapped or loose flywheel bolts etc etc. Anyways it would be obvious and hard to drive or start the engine.
If I were you, I would remove the valve cover to look for fallen rocker arms first, and check bent valves just for in case. And then go next diagnosis.

 

[DiSeM]

Are you running stock computer and MAF still?

I had a similar issue happen to me on my 1g with a 14b on stock everything, not really a downshift but an aggressive 2nd gear pull and it ended up popping a coupler off going into 3rd and I thought I blew my turbo or something. I could hardly drive the car in any gear, it got me rolling and could get me home but the more gas I gave it the worse it got. My upper hose came off of the intercooler. You should definitly check all of your charge piping for leaks, so that means follow the hoses going from your turbo to the intercooler, from the intercooler to the intake manifold, be sure all are tight.

Ideally you should at least perform a boost leak test. If there are not any leaks, then follow the other guys suggestions by either doing a leakdown test or popping open the valve cover to see what could be going on.

If you are on stock computer and MAF, it will not handle leaks well at all, especially not major ones. I really think that you have a major leak somewhere. It may even be in your Blow Off Valve.

If you can shift through all of the gears without it popping back out or grinding into it its probably not in your transmission. If it was your turbo you would be seeing smoke. The premature boost, is that your dash telling you that or do you have an actual boost gauge? And as far as being hard to get into 5th, you probably need to adjust your linkage to make it easier.

 

[Ceezdsm99]

Are you running stock computer and MAF still?

I had a similar issue happen to me on my 1g with a 14b on stock everything, not really a downshift but an aggressive 2nd gear pull and it ended up popping a coupler off going into 3rd and I thought I blew my turbo or something. I could hardly drive the car in any gear, it got me rolling and could get me home but the more gas I gave it the worse it got. My upper hose came off of the intercooler. You should definitly check all of your charge piping for leaks, so that means follow the hoses going from your turbo to the intercooler, from the intercooler to the intake manifold, be sure all are tight.

Ideally you should at least perform a boost leak test. If there are not any leaks, then follow the other guys suggestions by either doing a leakdown test or popping open the valve cover to see what could be going on.

If you are on stock computer and MAF, it will not handle leaks well at all, especially not major ones. I really think that you have a major leak somewhere. It may even be in your Blow Off Valve.

If you can shift through all of the gears without it popping back out or grinding into it its probably not in your transmission. If it was your turbo you would be seeing smoke. The premature boost, is that your dash telling you that or do you have an actual boost gauge? And as far as being hard to get into 5th, you probably need to adjust your linkage to make it easier.

Thanks a lot for your advice , been working a lot and haven’t been able to check it but I am tomorrow morning , hopefully it is just a leak somewhere , it was a money shift but like how you said I would hear the transmission grinding or my engine knocking . Yes I’m on stock eveything with stock bov … another issue I’ve had before is my cvjoint coming off of the trans a while back when my control arm came off due to a loose bolt .. idk if that could contribute to my problem but I’ll follow my hoses and tubes and see what’s going on I’ll keep this thread updated thanks again

 

[Ceezdsm99]

Thanks a lot for your advice , been working a lot and haven’t been able to check it but I am tomorrow morning , hopefully it is just a leak somewhere , it was a money shift but like how you said I would hear the transmission grinding or my engine knocking . Yes I’m on stock eveything with stock bov … another issue I’ve had before is my cvjoint coming off of the trans a while back when my control arm came off due to a loose bolt .. idk if that could contribute to my problem but I’ll follow my hoses and tubes and see what’s going on I’ll keep this thread updated thanks again

I fixed the axel/ cv joint never had that problem , but just giving more info on the car

 

[Ceezdsm99]

Are you running stock computer and MAF still?

I had a similar issue happen to me on my 1g with a 14b on stock everything, not really a downshift but an aggressive 2nd gear pull and it ended up popping a coupler off going into 3rd and I thought I blew my turbo or something. I could hardly drive the car in any gear, it got me rolling and could get me home but the more gas I gave it the worse it got. My upper hose came off of the intercooler. You should definitly check all of your charge piping for leaks, so that means follow the hoses going from your turbo to the intercooler, from the intercooler to the intake manifold, be sure all are tight.

Ideally you should at least perform a boost leak test. If there are not any leaks, then follow the other guys suggestions by either doing a leakdown test or popping open the valve cover to see what could be going on.

If you are on stock computer and MAF, it will not handle leaks well at all, especially not major ones. I really think that you have a major leak somewhere. It may even be in your Blow Off Valve.

If you can shift through all of the gears without it popping back out or grinding into it its probably not in your transmission. If it was your turbo you would be seeing smoke. The premature boost, is that your dash telling you that or do you have an actual boost gauge? And as far as being hard to get into 5th, you probably need to adjust your linkage to make it easier.

Update ,Turns out it’s my Turbo . my car has been smoking before this happened , I knew the turbo was on its way out , because boost would feel un sufficient at times , it’s blown out and the reason why it’s bogging out is because the turbo gets stuck , went to drive it this morning and it seemed to be running fine , and shifting through gears … even boosting fine. So that’s what it is blown turbo … gunna be going with a new 16 g from rev9 Ironically . Turbos are expensive asf and going with this for now . Thanks for your help