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Author Topic: c4 won't shift in first if in drive.  (Read 36058 times)
68mustang405
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« 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.
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68 Mustang 310 twisted wedge 170, tfs1, weiand stealth, 1.6 rr t5 3.55s with a locker, a/c and all the creature comforts.

On a serious note.. wagon made 3000hp on the dyno
90lxcoupe
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« 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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68mustang405
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« 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.
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68 Mustang 310 twisted wedge 170, tfs1, weiand stealth, 1.6 rr t5 3.55s with a locker, a/c and all the creature comforts.

On a serious note.. wagon made 3000hp on the dyno
69 Merc
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« Reply #3 on: January 10, 2010, 05:59:04 pm »

Subscribing to learn.   Thanx!
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Robert's 1969 Mercury Montego (FordStrokers 408W, QFT 850cfm RQ-AN, Super Victor, 1" aluminum open spacer, CamMotion HR .624"/.609" 251*/256* 108* LSA, 1-3/4"x3-1/2" headers, Dynomax Ultra #17224 mufflers, C6/4R100 trans, 8"/9" 5500 converter, Broader Performance manual V/B, 9" 4.56 Detroit Truetrac, Hoosier Pro Street 31x12.5R15 on 10" rims)

The Merc started here = http://sbftech.com/index.php/topic,27178.0.html  Now = http://sbftech.com/index.php/topic,34648.0.html

Thanks to Jim "Woody" and Nicole Woods @ FordStrokers 408W, Westminster Performance Transmission (W.P.T.) transmissions, TCS Performance converters, Broader Performance valvebodies and last but not least a BIG thanks (always) to my friends here and abroad in the World!
68mustang405
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« 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..
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68 Mustang 310 twisted wedge 170, tfs1, weiand stealth, 1.6 rr t5 3.55s with a locker, a/c and all the creature comforts.

On a serious note.. wagon made 3000hp on the dyno
jayh
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« 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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347HO
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« Reply #6 on: January 10, 2010, 06:58:57 pm »

Sounds like a governor weight is stuck
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... it was REALLY revving at like 4K...
If I saw that thing in my rear view Im pulling over to let you by, I be scared of that thing Huh? i dont know wich car is uglier ur or mine?
Javier
Ugly?  Easy now -- that's my baby and it's got lots of unique character!  When I drop that built 445" stroker in it you won't have any time to "pull over to let me pass" because I'll have already blown past you when you figure out what the hell was that loud noise behind you . . .  
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« Reply #7 on: January 10, 2010, 07:17:39 pm »

 Popcorn on Chair
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« 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!!!  
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Robert's 1969 Mercury Montego (FordStrokers 408W, QFT 850cfm RQ-AN, Super Victor, 1" aluminum open spacer, CamMotion HR .624"/.609" 251*/256* 108* LSA, 1-3/4"x3-1/2" headers, Dynomax Ultra #17224 mufflers, C6/4R100 trans, 8"/9" 5500 converter, Broader Performance manual V/B, 9" 4.56 Detroit Truetrac, Hoosier Pro Street 31x12.5R15 on 10" rims)

The Merc started here = http://sbftech.com/index.php/topic,27178.0.html  Now = http://sbftech.com/index.php/topic,34648.0.html

Thanks to Jim "Woody" and Nicole Woods @ FordStrokers 408W, Westminster Performance Transmission (W.P.T.) transmissions, TCS Performance converters, Broader Performance valvebodies and last but not least a BIG thanks (always) to my friends here and abroad in the World!
68mustang405
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« 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. 
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68 Mustang 310 twisted wedge 170, tfs1, weiand stealth, 1.6 rr t5 3.55s with a locker, a/c and all the creature comforts.

On a serious note.. wagon made 3000hp on the dyno
juiced coupe
Six figures worth of don't give a f*ck
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« 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.
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Doing more with less, or something like that.
http://sbftech.com/index.php/topic,20009.0.html

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Bottom line, if it was the hot ticket, the fast guys would do it.............they don't

You might need some Titanium rods and a flow bench!  LMAO on floor

I honestly don't get it.

I'm sweating, my heart is racing, my clutch foot is twichin', and my right arm punched the computer screen doing an involentary 2-3 shift while reading all that. 
68mustang405
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« Reply #11 on: January 10, 2010, 11:23:53 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.
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68 Mustang 310 twisted wedge 170, tfs1, weiand stealth, 1.6 rr t5 3.55s with a locker, a/c and all the creature comforts.

On a serious note.. wagon made 3000hp on the dyno
347HO
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« 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.
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... it was REALLY revving at like 4K...
If I saw that thing in my rear view Im pulling over to let you by, I be scared of that thing Huh? i dont know wich car is uglier ur or mine?
Javier
Ugly?  Easy now -- that's my baby and it's got lots of unique character!  When I drop that built 445" stroker in it you won't have any time to "pull over to let me pass" because I'll have already blown past you when you figure out what the hell was that loud noise behind you . . .  
gtvert90
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« Reply #13 on: January 10, 2010, 11:43:25 pm »

Well since you friggin disagree with every damn suggestion, just rebuild the piece of shit.
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« Reply #14 on: January 11, 2010, 12:14:39 am »

LOL, I don't think I've posted all day.
But that deserves a Spt at PC, and that's for sure going in my signature. Grin
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347- Canfield 195's, Holley Systemax II, Jones Cam, 3" Exhaust, 3" Spintechs, QuarterHorse, BE/EA

Well since you friggin disagree with every damn suggestion, just rebuild the piece of shit.
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