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Author
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Topic: C4 shifting problem
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JJonesy99
Journeyman Posts: 26
From: Lakewood, CO USA
Registered: Jan 2005
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posted 04-29-2005 10:35 AM
   
I have a 67 C4 and it will not hold second to 6,000 rpm's. So I disconnected the vacumm line from the carb and plugged it. Took it down the track and it still shifted about 5400. Can anyone help? I'm completely confused.Thanks,
Jason
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Moneymaker
Administrator Posts: 26513
From: Lyons, IL, USA
Registered: May 99
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posted 04-29-2005 11:52 AM
Did disconnecting the modulator increase the RPM at all?
What modifications were done to the valve body?------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
IP: Logged |
JJonesy99
Journeyman Posts: 26
From: Lakewood, CO USA
Registered: Jan 2005
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posted 04-29-2005 01:18 PM
Alex, the valve body is stock but it has a shift kit, thats about 1 1/2 years old. Thats all. Would an aftermarket valve body help? if so whats the cost?
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Moneymaker
Administrator Posts: 26513
From: Lyons, IL, USA
Registered: May 99
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posted 04-29-2005 01:38 PM
It depends a lot on the shift kit.
Have you tried shifting back to first after the 1-2 shift?
We used to have to do that with some of the crappy shift kits back in the old days.
Still do it on stock AOD transmissions.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
IP: Logged |
JJonesy99
Journeyman Posts: 26
From: Lakewood, CO USA
Registered: Jan 2005
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posted 04-29-2005 01:44 PM
No I havent tried that. I shift from 1-2 at 6,000 then about 5400-5500 its shifts automatically from 2-3, still with stock shifter in 2nd gear. I'm thinking why i have the tranny out of the car I'll put in a a new valve body. Is that a good start? of can i play with the vacum modulator on the back of the tranny?
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Moneymaker
Administrator Posts: 26513
From: Lyons, IL, USA
Registered: May 99
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posted 04-29-2005 01:47 PM
If you have the trans out, by all means contact JPT at 517-663-0578 and get a new valve body.
They can sell you one that still retains a drive function, yet shifts when you want it to, or a full manual, reverse pattern race unit.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
IP: Logged |
JJonesy99
Journeyman Posts: 26
From: Lakewood, CO USA
Registered: Jan 2005
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posted 04-29-2005 03:04 PM
Thanks Alex. How much does a standerd shifting pattern valve body cost? also, does JPT have a web site?
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JJonesy99
Journeyman Posts: 26
From: Lakewood, CO USA
Registered: Jan 2005
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posted 04-29-2005 03:15 PM
Alex, any opinions on the TCI streefighter valve body? My cqar is a 66' mustang with a 408w. The car is street but will see time at the track. Thanks for all the good help.
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Moneymaker
Administrator Posts: 26513
From: Lyons, IL, USA
Registered: May 99
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posted 04-29-2005 03:31 PM
No JPT website.
He has enough trouble with e-mail. 
[email protected]
Best to call them direct.
I would not use any TCI products.
They are much better these days since they are owned by Comp, but still 99% chebbie orientated.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
IP: Logged |
clevelandstyle
Gearhead Posts: 1098
From: Connersville, IN
Registered: Jul 2001
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posted 04-29-2005 07:22 PM
I used to run TCI manual valve body. It can't hold a candle to a JPT manual. I would highly recommend a JPT.------------------
Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 408C 4V, 10.50 127 MPH
IP: Logged |
74merc
Gearhead Posts: 1159
From: Demopolis AL
Registered: Jun 99
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posted 04-29-2005 11:35 PM
Will a JPT valve body still shift automatically in drive?
IP: Logged |
Moneymaker
Administrator Posts: 26513
From: Lyons, IL, USA
Registered: May 99
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posted 04-30-2005 12:11 AM
quote:
Originally posted by 74merc:
Will a JPT valve body still shift automatically in drive?
Count up about 6 posts. ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
IP: Logged |
74merc
Gearhead Posts: 1159
From: Demopolis AL
Registered: Jun 99
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posted 05-01-2005 02:01 AM
Sorry. I don't get to read until its late, I tend to miss some details.
IP: Logged |
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