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c4 won't shift in first if in drive.
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Topic: c4 won't shift in first if in drive. (Read 3278 times)
68mustang405
Big Block
Offline
Posts: 529
Location:
Oklahoma City, OK
c4 won't shift in first if in drive.
«
on:
January 09, 2010, 10:14:55 pm »
This is killing me and I'm about ready to sell the whole car cause of it.
The c4 is in a 68 mustang it's got a 70 valve body with a transgo 40-2.
It is 26 spline input and output shaft.
stock stall
tci bands and clutches with 5 clutches in the forward clutch pack.
H servo
Problem: damn thing won't start in first if put in drive, will start in first if you take it from reverse or park to 1. Starts off in second in drive and second in 2. Also have the annoying 2-3 flare. Type f fluid in it now, switch from mecon and it still had same symptoms. Replaced rear servo. I'm at my wits end. Is it something in the valve body maybe? Disassembled the valve body and checked to make sure all the pistons moved fine. I'm thinking a bleed over in the vb. If someone has some info please help and explain it in detail please.
Logged
68 Mustang 93 302 block, gt40 heads, tfs1 cam, 1.7 rr, performer intake, holley 600 vacuum secondary, c4 with tci internals, 8in 2.79 open differential
90lxcoupe
Adv_SBFTechie
Big Block
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Posts: 1264
Location:
Demotte, Indiana
Re: c4 won't shift in first if in drive.
«
Reply #1 on:
January 10, 2010, 12:04:40 pm »
What type of shifter & how is it adjusted? Does this thing have a kick down?
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I can explain it for you, but I can't understand it for you.
Adventure is the result of poor planning
68mustang405
Big Block
Offline
Posts: 529
Location:
Oklahoma City, OK
Re: c4 won't shift in first if in drive.
«
Reply #2 on:
January 10, 2010, 05:21:36 pm »
Yes it has a kickdown and no it's not the shifter. It's stock 68 mustang floor shifter and if i shift it from park to 1 it will go into one so I know it's not the adjustment. The kickdown is adjusted properly, it won't actuate unless the pedal is to the floor. Btw I don't see how that would have anything to do with it because if it was incorrectly adjusted it would stay in first not stay in second and not kicke down to first if that makes sense. Sorry for the long post I am just writing what I'm thinking right now.
Logged
68 Mustang 93 302 block, gt40 heads, tfs1 cam, 1.7 rr, performer intake, holley 600 vacuum secondary, c4 with tci internals, 8in 2.79 open differential
69 Merc
Adv_SBFTechie
Big Block
Offline
Posts: 3830
Location:
Anaheim, CA
Re: c4 won't shift in first if in drive.
«
Reply #3 on:
January 10, 2010, 05:59:04 pm »
Subscribing to learn.
Logged
Robert's {
http://sbftech.com/index.php/topic,27178.0.html
} 1969 Mercury Montego MX
is
NOT
a track car but
ONLY
a 3750lb
Daily Driven
(75mi/wk) 9.5" SBF 363W (+.060" over), 9.5:1cr, stock 5qt oil pan, Melling oil HV pump, RPM 2.02", Comp XE-274 HFT, RPM Air-Gap, 2" four-hole + 2" open aluminum spacers, Holley/Proform HP annular 750cfm DP carb, #76 primary jets, #80 secondary jets, 10.5"hg PV, primary's idle A/F @ 1ccw, secondary's idle A/F @ 3/4ccw, in neutral = 14"hg @ 1200rpm, in gear = 12"hg @ 1050rpm, 1/2" aluminum fuel line from RCI 22gal fuel cell to the carb, 100micron fuel filter, Holley billet 170gph mechanical fuel pump, 195* hi-flow thermostat, 1978 brass 4 row Corvette radiator, dual electric fans with manual switch, Pertronix billet mechanical distributor w/ lightest silver advance springs = 34* total @ 1800rpm, Accufab 1-3/4" x 3" LT headers, V-band clamps, modified C4, manual VB, 10" billet 4500rpm stall TC, custom deep trans pan, external trans fluid radiator, 4.56 geared 9", Detroit TrueTrac, 31 spline axles, street radial P295-50/15" on 10" rims, sub-frame connectors, driveshaft safety-loop, 3/8" welded chain torque strap, custom leaf spring suspension, traction bars, manifold vacuum gauge, A/F ratio meter, 10K tachometer, oil pressure gauge, coolant temp gauge and a digital rev-limiter set @ 6000rpm -- crappy cast pistons!
68mustang405
Big Block
Offline
Posts: 529
Location:
Oklahoma City, OK
Re: c4 won't shift in first if in drive.
«
Reply #4 on:
January 10, 2010, 06:21:11 pm »
it's weird, but i've looked all over the net and NOONE has this problem, so I'm almost pos. it is a valve body bleeding accross. If anyone has the vb manual or explains what each port is for I would appreciate it if someone posts it up..
Logged
68 Mustang 93 302 block, gt40 heads, tfs1 cam, 1.7 rr, performer intake, holley 600 vacuum secondary, c4 with tci internals, 8in 2.79 open differential
jayh
Big Block
Offline
Posts: 1692
Location:
Buffalo
Re: c4 won't shift in first if in drive.
«
Reply #5 on:
January 10, 2010, 06:35:41 pm »
is the vacuum modulator good? is the governor stuck?
join this forum and ask over there-
www.clickclickracing.com
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1. Internet Thug -
1) An Internet thug, is a guy that acts all hardcore on the PC (via internet), but if you saw them in person, you would laugh. 2) a person that talks shit over the internet or over the phone, but in person, does not. Infact avoids confutation wholeheartedly.
ie.- someone who is 5'8" 160lbs, looks like they are 16, and goes around the internet calling people twice their size a faggot
347HO
A-1 Super Genious
Adv_SBFTechie
Big Block
Offline
Posts: 8089
Location:
Seattle, Washington
Re: c4 won't shift in first if in drive.
«
Reply #6 on:
January 10, 2010, 06:58:57 pm »
Sounds like a governor weight is stuck
Logged
HUGE thanks to;
www.fordstrokers.com
www.camshaftinnovations.com
www.teamzmotorsports.net
http://www.pro-system.com/
Quote from: PapaGeno21 on August 09, 2009, 04:34:39 pm
... it was REALLY revving at like 4K...
Quote from: ranchopower on November 09, 2009, 11:04:30 pm
If I saw that thing in my rear view Im pulling over to let you by, I be scared of that thing
i dont know wich car is uglier ur or mine?
When I say "junk" I'm talking about parts or setup in general... not say POS.
knowitall
Stroked Small Block
Offline
Posts: 485
Location:
Brockton, MA.
64 Falcon on the outside. 89 gt 0n the inside.
Re: c4 won't shift in first if in drive.
«
Reply #7 on:
January 10, 2010, 07:17:39 pm »
Logged
You were really flying when I past you.
The more I learn, the less I seem to know.
69 Merc
Adv_SBFTechie
Big Block
Offline
Posts: 3830
Location:
Anaheim, CA
Re: c4 won't shift in first if in drive.
«
Reply #8 on:
January 10, 2010, 07:39:32 pm »
If it is the VB or the governor or your modulator that is giving you your problem then may I suggest to go to a full manual VB? I have one and they are a serious blast to drive! Always full on line pressure = fastest shift and less (slippage and flaring) EVERY shift. No more cables and no more governors and no more stinkin' modulators, etc!!!
Logged
Robert's {
http://sbftech.com/index.php/topic,27178.0.html
} 1969 Mercury Montego MX
is
NOT
a track car but
ONLY
a 3750lb
Daily Driven
(75mi/wk) 9.5" SBF 363W (+.060" over), 9.5:1cr, stock 5qt oil pan, Melling oil HV pump, RPM 2.02", Comp XE-274 HFT, RPM Air-Gap, 2" four-hole + 2" open aluminum spacers, Holley/Proform HP annular 750cfm DP carb, #76 primary jets, #80 secondary jets, 10.5"hg PV, primary's idle A/F @ 1ccw, secondary's idle A/F @ 3/4ccw, in neutral = 14"hg @ 1200rpm, in gear = 12"hg @ 1050rpm, 1/2" aluminum fuel line from RCI 22gal fuel cell to the carb, 100micron fuel filter, Holley billet 170gph mechanical fuel pump, 195* hi-flow thermostat, 1978 brass 4 row Corvette radiator, dual electric fans with manual switch, Pertronix billet mechanical distributor w/ lightest silver advance springs = 34* total @ 1800rpm, Accufab 1-3/4" x 3" LT headers, V-band clamps, modified C4, manual VB, 10" billet 4500rpm stall TC, custom deep trans pan, external trans fluid radiator, 4.56 geared 9", Detroit TrueTrac, 31 spline axles, street radial P295-50/15" on 10" rims, sub-frame connectors, driveshaft safety-loop, 3/8" welded chain torque strap, custom leaf spring suspension, traction bars, manifold vacuum gauge, A/F ratio meter, 10K tachometer, oil pressure gauge, coolant temp gauge and a digital rev-limiter set @ 6000rpm -- crappy cast pistons!
68mustang405
Big Block
Offline
Posts: 529
Location:
Oklahoma City, OK
Re: c4 won't shift in first if in drive.
«
Reply #9 on:
January 10, 2010, 08:25:54 pm »
vacuum mod is brand new, we cleaned everything out so i'm sure the governors good too when I pull the valve body I'll check it. But will someone explain why either one of those would cause it to NOT GO INTO FIRST? Sorry for my caps but just making sure everyone is getting this. It makes no sense to me why either of these would cause it to not go into first. If it wasn't upshifting it woudl be another story, one determines part shifts and another determines full throttle shifts I know. And sorry no thanks on the full manual vb. Can't afford it even if it was 20 bux. A little more info, the screws are 2 1/2 out on the low reverse band and 1 on the forward band. All line pressures were good except reverse was a lil low but this was before the piston was replaced so that could have changed.
Sorry for my long winded posts but i feel like i need to explain myself otherwise I might get some flak like some of my other buddies did on this forum. Lot of useful info so I don't wanna mess that up.
Logged
68 Mustang 93 302 block, gt40 heads, tfs1 cam, 1.7 rr, performer intake, holley 600 vacuum secondary, c4 with tci internals, 8in 2.79 open differential
juiced coupe
Global Moderator
Big Block
Offline
Posts: 1473
Location:
Pascagoula, MS
Re: c4 won't shift in first if in drive.
«
Reply #10 on:
January 10, 2010, 09:18:52 pm »
Have you adjusted the vacuum modulator? If its not adjusted correctly, you may be shifting out of first almost immediately.
Logged
1992 coupe,306,RPM heads and intake,750 dp,NX/NOS based system,Jay Allen/C.I. cam and valvetrain,c4,and 4.10s
Just a 12 second car with a 11 second engine.....that runs 10s
http://sbftech.com/index.php/topic,20009.0.html
68mustang405
Big Block
Offline
Posts: 529
Location:
Oklahoma City, OK
Re: c4 won't shift in first if in drive.
«
Reply #11 on:
January 10, 2010, 11:23:53 pm »
Quote from: juiced coupe on January 10, 2010, 09:18:52 pm
Have you adjusted the vacuum modulator? If its not adjusted correctly, you may be shifting out of first almost immediately.
No cause if you shift it from park to first, it feels different then if you start it in drive. You can tell it's starting off in second.
Logged
68 Mustang 93 302 block, gt40 heads, tfs1 cam, 1.7 rr, performer intake, holley 600 vacuum secondary, c4 with tci internals, 8in 2.79 open differential
347HO
A-1 Super Genious
Adv_SBFTechie
Big Block
Offline
Posts: 8089
Location:
Seattle, Washington
Re: c4 won't shift in first if in drive.
«
Reply #12 on:
January 10, 2010, 11:39:45 pm »
Well since you friggin disagree with every damn suggestion, just rebuild the piece of shit.
Logged
HUGE thanks to;
www.fordstrokers.com
www.camshaftinnovations.com
www.teamzmotorsports.net
http://www.pro-system.com/
Quote from: PapaGeno21 on August 09, 2009, 04:34:39 pm
... it was REALLY revving at like 4K...
Quote from: ranchopower on November 09, 2009, 11:04:30 pm
If I saw that thing in my rear view Im pulling over to let you by, I be scared of that thing
i dont know wich car is uglier ur or mine?
When I say "junk" I'm talking about parts or setup in general... not say POS.
gtvert90
Adv_SBFTechie
Big Block
Offline
Posts: 4406
Location:
Belvidere, IL
Re: c4 won't shift in first if in drive.
«
Reply #13 on:
January 10, 2010, 11:43:25 pm »
Quote from: 347HO on January 10, 2010, 11:39:45 pm
Well since you friggin disagree with every damn suggestion, just rebuild the piece of shit.
Logged
Phil.
In reference to allfordmustangs
Quote from: amustangrocks;1664912
welcome the the best of the mustang forums
Quote from: DeepRoots on June 18, 2010, 11:17:59 am
I was a little hesitant to look at pictures of "your junk"
liljoe07
Adv_SBFTechie
Big Block
Offline
Posts: 6209
Location:
Cartersville, GA
Re: c4 won't shift in first if in drive.
«
Reply #14 on:
January 11, 2010, 12:14:39 am »
LOL, I don't think I've posted all day.
But that deserves a
, and that's for sure going in my signature.
Logged
89 Coupe:
302- Canfield 195's, Jay Allen Cam, Holley Systemax II, Comp Cams 1.6's,75mm TB & MAF, 24lb Inj, 4.10's, 3" Exhaust
Quote from: 347HO on January 10, 2010, 11:39:45 pm
Well since you friggin disagree with every damn suggestion, just rebuild the piece of shit.
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