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Old 03-07-2013, 07:36 PM
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C4, no, or very late 2-3 shift

Hey guys,

My son's Granada's C4 does not shift 2-3 or sometimes does it after reaching almost 60mph, there's good vaccum at the modulator and I removed the kickdown just to make sure. The gas millage is terrible and guess who's paying for his gas? he's full time at college.

What is likely to be happening?

Is there an easy cure for this, I mean not having to remove the valve body? I don't want to break the gaskets if possible.

thanks a lot.

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Old 03-07-2013, 07:48 PM
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Adjust the modulator. Turn the screw out about 6 turns. If it gets better then try 6 more.
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Old 03-07-2013, 08:18 PM
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already did that, I even ended up removing the screw, did not make any difference.
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Old 03-07-2013, 09:13 PM
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Have you removed the modulator to see if the pin is still in the end?
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Old 03-08-2013, 10:08 AM
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yes, the little critter is still there.
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Old 03-08-2013, 10:10 AM
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drove the car this morning and is worse, the shift to 3rd is totally gone..
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Old 03-08-2013, 11:33 AM
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drove the car this morning and is worse, the shift to 3rd is totally gone..
Low/reverse is a band, 2-3 are a clutch pack.

Sounds to me that you need to pull that transmission and do a teardown/rebuild. My guess, pump 'O' ring failure, especially if you have any new ATF drips.

BUT - before you pull the transmission though, pull the pan and the valve body and check those spool valves as well as the internal linkage going to the valve body. Yeah, I know pan gaskets are hard to find, even in the US and a corner parts store - in Ecuador - easy to make which I have even done.

Here's what it looks like internally:

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Old 03-08-2013, 02:51 PM
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is not the pan gasket the one that scares me, it's the valve body gaskets, I can't find them alone, they only come with the whole pizza box (rebuild kit) and they will be very hard to make, let alone I've never seen that kind of gasket material for sale. I have the trans manual and in the troubleshooting they guide me towards the spool valves and the governor, one of them must be stuck or frozen.

maybe if I buy a shift kit from summit, they are like 40 bucks and come with the gaskets I'll be needing, use the R/V mode 'cos the street/strip will be odd in a 4 door sedan.
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Old 03-08-2013, 03:56 PM
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is not the pan gasket the one that scares me, it's the valve body gaskets, I can't find them alone, they only come with the whole pizza box (rebuild kit) and they will be very hard to make, let alone I've never seen that kind of gasket material for sale. I have the trans manual and in the troubleshooting they guide me towards the spool valves and the governor, one of them must be stuck or frozen.

maybe if I buy a shift kit from summit, they are like 40 bucks and come with the gaskets I'll be needing, use the R/V mode 'cos the street/strip will be odd in a 4 door sedan.
OK - I know what gasket you need.

Spool valves are easy to work on once the valve body is out. The governor is in the tailshaft - and a pain to get at unless the trans. is out.

I've used the street 'n' strip mod kit versions before and in fact my '31 has the TCI version in it. For daily use, and as long as you let it shift normally, starting in D, not a problem. It will chirp the tires, at a minimum if you manually shift L-2-D, break them loose at full throttle

This is about the best source for individual parts for C4's I've found: C-4, C-5 Transmission Parts Ford - rear wheel drive
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Old 03-08-2013, 06:29 PM
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How many C4 valve body gaskets do you need? I have many early - to late model C4 , I have NO C5 valve body gaskets. C5 has different valve body design from C4

Would the USPS postal service get the package to you ?

USPS = United States Postal Service
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Old 03-09-2013, 10:19 AM
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How many C4 valve body gaskets do you need? I have many early - to late model C4 , I have NO C5 valve body gaskets. C5 has different valve body design from C4

Would the USPS postal service get the package to you ?

USPS = United States Postal Service
sure they will, the USPS even has an agreement with Ecuador's postal service to bring goods of up to $400 or 8 pounds without going trough customs so we'll pay no duties.
thanks a lot for the gaskets, I'm going to find out what year is my C4, it is a case fill but no idea about the year and I understand that the VB's are different, am I right?
I'll let you know,
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Old 03-09-2013, 12:23 PM
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sure they will, the USPS even has an agreement with Ecuador's postal service to bring goods of up to $400 or 8 pounds without going trough customs so we'll pay no duties.
thanks a lot for the gaskets, I'm going to find out what year is my C4, it is a case fill but no idea about the year and I understand that the VB's are different, am I right?
I'll let you know,
If it works out , let me know. Send a Private Message on the address to you that I can use with USPS.

Also...Since rules do not allow sales on the open forums: to make sure folks understand I am NOT selling these C4 gaskets to Augusto. I am giving the gaskets to him if I have gaskets he needs and determines he needs them.

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Old 03-09-2013, 01:21 PM
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I just sent you a PM

thanks a lot, I really appreciate your help.

Augusto.
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Old 04-01-2013, 11:56 AM
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Thank you very much Crosley.

Dear Crosley,

Snail mail finaly delivered the gaskets this morning, thanks a lot sir, I really appreciate your kindness.

I'll tear up the tranny later this week, this means my son's gonna take my car and I'll be on sneakers power.. or driving my C30 that loves guzzling gas, no problem, it's for my son.

Best regards from the middle of the planet.

Augusto.
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Old 04-10-2013, 12:16 PM
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Update:

I finally had the time to fix the tranny, I found the 2-3 shift valve very stuck, seems like when this tranny was in storage, moisture found a way in there and rust froze it, took me half a day removing the spool from the valve body and smoothing it back, both the spool and the bore, I had to make myself something like a mini hone tool to work in the innermost part of the bore, I used 1/8 welding rods bended like an "L" to push out the valve, drove it throug the slots in the vb and turned it to make it push outwards, there's no way to just pull the valve from the outside, it turned out fine, the transmision is shifting into 3rd gear now and the problem is solved.

Thanks a lot Crosley for giving me the gaskets, I only used one of them, if the mustang's tranny craps out I can also fix it now. I'm a C4 expert now

Augusto.
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