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-   -   Car wont go into fourth gear at 6000-7000 rpm (https://mustangforums.com/forum/s550-2015-2023-mustang/729522-car-wont-go-into-fourth-gear-at-6000-7000-rpm.html)

DarkRattle 03-06-2017 06:36 PM

Car wont go into fourth gear at 6000-7000 rpm
 
So got my brand new 2017 Mustang GT performance pack a month ago, I've been noticed at 6000-7000 rpms on third gear, it will NOT shift into fourth, I swear I'm smashing in the clutch but it's just not going, I took it to service today and they said they tested the hell out of it (wasted all my already expensive gas) and they said it goes into fourth. What could be the issue? Why is the car not going into fourth at the high RPMs? I've jammed it in once and the car went insane like putting a 60 mph car in 1st.

darkmach1 03-06-2017 06:57 PM

Take the lead tech on a drive with you.

DarkRattle 03-06-2017 06:58 PM


Originally Posted by darkmach1 (Post 8580525)
Take the lead tech on a drive with you.

I don't think he'll appreciate me trying to change gears in 3rd gear at 7000 rpm considering that would be going around 100 mph lol.

DarkRattle 03-06-2017 11:20 PM

Guys I just realized I've been smashing into second gear instead of fourth.... wow, now What I'm scared of is I destroyed the engine because it always redlined to 8000. Do you guys think the engine is OK? I mean i had the service today but ever since then I did it maybe 10 times. Is there anything in the engine to prevent damage?

DarkRattle 03-07-2017 06:34 AM


Originally Posted by darkmach1 (Post 8580525)
Take the lead tech on a drive with you.

Normally I'd agree with the you're an idiot thing xD But to be fair of driving a Cobra for 10 years and never having this problem, I'd blame it on the short shifter's positioning (and of course my retardedness xD)

proeagles 03-07-2017 07:53 AM


Originally Posted by DarkRattle (Post 8580559)
Guys I just realized I've been smashing into second gear instead of fourth.... wow, now What I'm scared of is I destroyed the engine because it always redlined to 8000. Do you guys think the engine is OK? I mean i had the service today but ever since then I did it maybe 10 times. Is there anything in the engine to prevent damage?

A GT won't redline 8000RPM. The fuel shuts off at the actual redline to prevent over revving the engine.

DarkRattle 03-07-2017 07:53 AM


Originally Posted by proeagles (Post 8580579)
A GT won't redline 8000RPM. The fuel shuts off at the actual redline to prevent over revving the engine.

so the rev reading was wrong? Basically the cars revs shut up to 8000 rpm in the guage and it hella slowed down quick.

Coosawjack 03-07-2017 08:46 AM


Originally Posted by DarkRattle (Post 8580559)
Guys I just realized I've been smashing into second gear instead of fourth.... wow, now What I'm scared of is I destroyed the engine because it always redlined to 8000. Do you guys think the engine is OK? I mean i had the service today but ever since then I did it maybe 10 times. Is there anything in the engine to prevent damage?

I'd be worried about what damage you've done to the transmission??:confused:

If no damage has been done I'd say the MT82 is rather STRONG!!:icon_toast:

Get an MGW shifter and forget missed shifts!!:D

https://www.mgwshifters.com/shifters/mustangs/103

Good Luck!

darkmach1 03-07-2017 09:27 AM


Originally Posted by proeagles (Post 8580579)
A GT won't redline 8000RPM. The fuel shuts off at the actual redline to prevent over revving the engine.

If you're at the top of 3rd and throw it in second the fuel cutoff isn't gonna save you. It will go to where 2nd gear rpm corresponds for that speed.

DarkRattle 03-07-2017 06:55 PM


Originally Posted by darkmach1 (Post 8580600)
If you're at the top of 3rd and throw it in second the fuel cutoff isn't gonna save you. It will go to where 2nd gear rpm corresponds for that speed.

Yup noticed thAt. The rev limiter wasnt hit. So at the next car service they should detect if anything was damaged correct?

proeagles 03-07-2017 08:13 PM


Originally Posted by darkmach1 (Post 8580600)
If you're at the top of 3rd and throw it in second the fuel cutoff isn't gonna save you. It will go to where 2nd gear rpm corresponds for that speed.

This is so true. But that engine won't willingly rev to 8K because of the limiter.

DarkRattle 03-08-2017 02:24 AM

Update: don't hear any sounds, car's still as fast, everything good then?

99GTvert 03-08-2017 06:54 AM

If the car seems to drive just fine like before then I'm guessing its fine.

proeagles 03-08-2017 07:23 AM

That is the beauty of overhead cam engines.

DarkRattle 03-08-2017 07:24 AM


Originally Posted by proeagles (Post 8580778)
That is the beauty of overhead cam engines.

Can you explain that? I'm quite retarded when it comes to car internals.

darkmach1 03-08-2017 10:00 AM

Do a compression test/leak down test

DarkRattle 03-09-2017 03:12 AM


Originally Posted by darkmach1 (Post 8580807)
Do a compression test/leak down test

Do the car services do that? Can I just request it?

proeagles 03-09-2017 07:08 AM


Originally Posted by DarkRattle (Post 8580779)
Can you explain that? I'm quite retarded when it comes to car internals.

The valves are in direct contact with the cams instead of push rods like in a Chevy V8, less moving parts, less to go wrong would be the simple answer.

darkmach1 03-09-2017 09:38 PM


Originally Posted by darkmach1 (Post 8580807)
Do a compression test/leak down test


Originally Posted by DarkRattle (Post 8581011)
Do the car services do that? Can I just request it?

Go to your favorite mechanic or shop, they will do it for you.

DarkRattle 03-10-2017 01:32 AM


Originally Posted by darkmach1 (Post 8581199)
Go to your favorite mechanic or shop, they will do it for you.

How much does it cost?

DarkRattle 03-10-2017 02:31 AM


Originally Posted by bonnie sacer (Post 8581218)
6000-7000 rpms is too high, that is damage for the engine

7000 rpm is the redline, how is 6000 too high, when you're pulling you change gears right before redline.

darkmach1 03-10-2017 02:48 AM


Originally Posted by bonnie sacer (Post 8581218)
6000-7000 rpms is too high, that is damage for the engine

Fail post is fail

DarkRattle 03-10-2017 02:49 AM


Originally Posted by darkmach1 (Post 8581220)
Fail post is fail

You have a mach1? Eaton swapped?

darkmach1 03-10-2017 05:47 PM


Originally Posted by DarkRattle (Post 8581221)
You have a mach1? Eaton swapped?

Had, yes.

DarkRattle 03-10-2017 10:12 PM


Originally Posted by darkmach1 (Post 8581329)
Had, yes.

Me too (well 04 cobra) xD Miss it any? I miss the whining but not the 8 mpg.

darkmach1 03-12-2017 05:10 AM


Originally Posted by DarkRattle (Post 8581350)
Me too (well 04 cobra) xD Miss it any? I miss the whining but not the 8 mpg.

Every day. I was getting upper teens in mpg. I looked several times for it but never found it. I could've used the vin to find current owner but didn't want to be creepy lol.


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