Still can't shift at WOT after JHR clutch line...

BPatterson

Active Member
Established Member
Joined
Dec 15, 2011
Messages
1,748
Location
Clarksville, TN
Installed it this morning, switched over to DOT 4 fluid, bled it, and still won't go into second gear at WOT. This is by far the most frustrating manual car I have ever owned.
 

five.slow

El Jefe
Established Member
Joined
May 18, 2008
Messages
3,422
Location
NORTH EASTON, MASS
Shifter and bracket still stock? Line fixes the clutch staying disengaged (pedal sticking to the floor). Shifter fixed being able to find each gear better and the bracket fixes the slop and also aids in going into gear
 

BPatterson

Active Member
Established Member
Joined
Dec 15, 2011
Messages
1,748
Location
Clarksville, TN
Barton shifter and bracket, JHR clutch line, DOT 4 fluid. When going for 2nd gear, it will not go in. I pull back as hard as I can, and after approx. 2 seconds, it finally goes in. I don't think the pressure plate is releasing. This is my second transmission. First one didn't do it, but then again, it only lasted 7500 miles. The second one is a brand new one from Ford, that now has 9000 miles on it. Clutch pedal doesn't stick to the floor, never has. Just won't go into 2nd gear during WOT shifts. Still has the helper spring on it.
 

five.slow

El Jefe
Established Member
Joined
May 18, 2008
Messages
3,422
Location
NORTH EASTON, MASS
Barton shifter and bracket, JHR clutch line, DOT 4 fluid. When going for 2nd gear, it will not go in. I pull back as hard as I can, and after approx. 2 seconds, it finally goes in. I don't think the pressure plate is releasing. This is my second transmission. First one didn't do it, but then again, it only lasted 7500 miles. The second one is a brand new one from Ford, that now has 9000 miles on it. Clutch pedal doesn't stick to the floor, never has. Just won't go into 2nd gear during WOT shifts. Still has the helper spring on it.

i still have issues with 3rd but i dont think it has anything to do with the upgrades either. here next month when im on vacation im gonna get my car on the lift and pull the transmission to inspect the clutch to see if it has issues. but honestly i dont think its clutch either i think its just the design of the transmission and shifter. this remote shifter crap sucks and there will always be play somewhere which will cause issues. we picked stick cars so now we have to deal with it i guess. maybe a transmission swap to something that is face plated? wont miss gears with that :beer:
 

bam2012@TBR

Authorized Vendor
Authorized Vendor
Joined
Oct 23, 2011
Messages
697
Location
virginia beach, va
Installed it this morning, switched over to DOT 4 fluid, bled it, and still won't go into second gear at WOT. This is by far the most frustrating manual car I have ever owned.

When you say wot I assume you are talking about your higher than stock redline due to the boss intake? If so I thought people were having issues with the stock clutch over 7200rpm. If you are willing to try them, I have motor mounts installed on my car, with my mgw shifter, motor mounts, jhr clutch line and dot4 fluid I can rip all gears, of course I am only shifting at 7k max, stock intake manifold.
 

xxbmxlsxx

Member
Established Member
Joined
Sep 25, 2011
Messages
318
Location
st louis
i put in a mcleod rxt and problem solved. the other thing to focus on when your shifting fast is to keep your wrist relaxed. since the shifter isnt mounted on top like the older stangs you cant muscle it. we call it "***" handing it lol

but that stock clutch just doesnt want to help wot shifts
 

REPCobra10

New Member
Established Member
Joined
Aug 15, 2005
Messages
3,132
Location
Tamarac, FL
the other thing to focus on when your shifting fast is to keep your wrist relaxed. since the shifter isnt mounted on top like the older stangs you cant muscle it. we call it "***" handing it lol

:lol1:"*** handling" the shifter! I've never heard it quite called that, but I do agree that relaxing your wrist does in fact help.
 

phack

New Member
Established Member
Joined
May 31, 2011
Messages
160
Location
PA
Shifter and bracket still stock? Line fixes the clutch staying disengaged (pedal sticking to the floor). Shifter fixed being able to find each gear better and the bracket fixes the slop and also aids in going into gear

I have the line and and MGW shifter and I still have occasional problems with the clutch sticking to the floor. I'm going to try to remove the spring next.
 

BPatterson

Active Member
Established Member
Joined
Dec 15, 2011
Messages
1,748
Location
Clarksville, TN
Out of all the manual performance cars I've owned, this one frustrates me beyond belief! I've always prided myself in my shifting skills. I was one of the first ones to put a bone stock LS1 f-body in the 12's, running a 12.94 @110 bone stock. I know this isn't a T56, but still.....DAMN!!!! lol

Also, I shift at 7500 with the Boss manifold.
 

SILV03MustangGT

Han Brolo CDR 5.Broliance
Established Member
Joined
May 23, 2004
Messages
3,044
Location
Mustang Ok
This is troubling.

i think it may be an small issue not enough to get into panic mode about. pre JHR line, ive had no troubles shifting the car at 7400 on the stock manifold (no reason to do so but i wanted to do it for shits and grins). No issue post JHR line either.
 

Swetrid

Member
Established Member
Joined
Mar 11, 2012
Messages
342
Location
Reading Pa
I have same issues with slicks on my car. I took my steeda bracket back off but left shifter on seems to be a lot better. Last week I thru an old set of drag radials on and had no issues at the track at all and managed to run within .1 of previous best on slicks. I did order a torque limiter setup from CHE Performance to see if it fixes concern. Im putting it on today and gonna go to the track on Friday to see if it fixes slick issue.
 

99cobraUgotbit

GT500
Established Member
Joined
Jun 15, 2004
Messages
2,053
Location
Tulsa,Oklahoma
When you say wot I assume you are talking about your higher than stock redline due to the boss intake? If so I thought people were having issues with the stock clutch over 7200rpm. If you are willing to try them, I have motor mounts installed on my car, with my mgw shifter, motor mounts, jhr clutch line and dot4 fluid I can rip all gears, of course I am only shifting at 7k max, stock intake manifold.

I think we both agree here! The mounts do make a difference. I have the same issue and cannot get into 1-2 but ONLY at the track!!! I think the stocker motor mounts have too much cushion and the motor completely torques and twists causeing the 1-2 shift miss.......
I also installed a new clutch line, DOT4 brake/clutch fluid, bleed the breaks, 75-90 RP trans fluid. Took it to the track and still had the issue!!! So I installed new motor mounts and the MGW but haven't gone to the track yet. But can wait to see if the new motor mounts fix the issue we are having.

This is turning Out to be a major issue for some of us M6 users
Does it only happen at the track?
 
Last edited:

kona12

Member
Established Member
Joined
Sep 21, 2011
Messages
709
Location
NYC
I havent had no issues even on high rev shifting all i have is the Barton bracket. Do want to change the line next mod.. But dont want to create headaches if theyre arent any.
 

Shaun@AED

Well-Known Member
Joined
Jul 13, 2005
Messages
2,253
Location
CA
I've also had similar problems and have come to the conclusion we are boiling the clutch fluid.

The clutch/pressure plate heats up the slave cylinder and boils the fluid in the slave. Once that happens there is not enough fluid pressure to release the clutch.
The larger orifice clutch lines allow more fluid thru vs clutch pedal travel, but it does not solve the problem. It's a bad-aid at best IMO.

Depending on the DOT4 fluid used vs DOT3 you will raise the boiling point ~100 degrees, again not enough as I have already swapped out the DOT3 for DOT4 (475 degree boiling point) and still have issues.

Best I can do is pump the clutch like crazy after a burnout (fluid boils during burnout) and I can nail 3 gear changes with slicks dropping the hammer. If I was on DR's slipping the clutch, I doubt I'd be able to nail even the first gear change.

Once the rest of my new brake setup gets here I'll be doing another fluid swap, and even have a remote clutch reservior ready to install if needed.

Tilton makes TSR-1 brake fluid which is labeled as DOT4 and compatible with conventional DOT3/4, but it boils at 622 degrees! I'll be swapping the entire brake/clutch system over to TSR-1 fluid before the next track outing.

IMO this is yet another band-aid. The proper fix would be a Slave that is insulated from the heat of the clutch/pressure plate.
 

SILV03MustangGT

Han Brolo CDR 5.Broliance
Established Member
Joined
May 23, 2004
Messages
3,044
Location
Mustang Ok
I've also had similar problems and have come to the conclusion we are boiling the clutch fluid.

The clutch/pressure plate heats up the slave cylinder and boils the fluid in the slave. Once that happens there is not enough fluid pressure to release the clutch.
The larger orifice clutch lines allow more fluid thru vs clutch pedal travel, but it does not solve the problem. It's a bad-aid at best IMO.

Depending on the DOT4 fluid used vs DOT3 you will raise the boiling point ~100 degrees, again not enough as I have already swapped out the DOT3 for DOT4 (475 degree boiling point) and still have issues.

Best I can do is pump the clutch like crazy after a burnout (fluid boils during burnout) and I can nail 3 gear changes with slicks dropping the hammer. If I was on DR's slipping the clutch, I doubt I'd be able to nail even the first gear change.

Once the rest of my new brake setup gets here I'll be doing another fluid swap, and even have a remote clutch reservior ready to install if needed.

Tilton makes TSR-1 brake fluid which is labeled as DOT4 and compatible with conventional DOT3/4, but it boils at 622 degrees! I'll be swapping the entire brake/clutch system over to TSR-1 fluid before the next track outing.

IMO this is yet another band-aid. The proper fix would be a Slave that is insulated from the heat of the clutch/pressure plate.

just out of curiosity do the GT500s have a similar issue or since they have different tranny its a whole different setup?
 

Shaun@AED

Well-Known Member
Joined
Jul 13, 2005
Messages
2,253
Location
CA
:cryying:
just out of curiosity do the GT500s have a similar issue or since they have different tranny its a whole different setup?

I was at the track a few weeks back with a few customers. 2 of them have GT500's (07/08). One was having troubles missing gears. He reported that pumping the clutch after the burnout greatly helped shifting done the 1/4.
 

Users who are viewing this thread



Top