C4 Transmission

shaneb · 2011-10-17, 11:42

Just got another C4 transmission and I took the transmission pan off to replace it and the filter. I found 3 bolts inside it, it looks like they came off the top part because it was missing 4 total. I havent installed it yet to see if it works. They screwed back in and there not stripped. From the bolts being off do you think its fried?

I guess I will find out once I install it.

PaulS · 2011-10-17, 12:50

If the bolts came off the filter it is probably OK - the oil level is above the filter mounting point - but you may have a warped valvebody so watch for shifting problems.

Paul

mvw66gt · 2011-10-17, 12:56

I would be suspect of someone tearing into it at one point. May have been an issue with the valve body, etc. I don't think those would just fall out. I would definitely go through it before putting it in the car. That would be a lot of work to find out that it was fried. - Matt

shaneb · 2011-10-17, 13:02

These werent off the filter. Theres a box like thing that has a lot of bolts on it.The filter also bolts to this box thing. Thats where the bolts came out of. It also looks like someone put a bolt upside down in the transmission. I dont know anything about transmissions at all besides how to install one. It came out of a 74 comet with a 302.

Quote:

Originally Posted by PaulS

If the bolts came off the filter it is probably OK - the oil level is above the filter mounting point - but you may have a warped valvebody so watch for shifting problems.

Paul

PaulS · 2011-10-17, 13:05

That box thing is your valve body... same caution applies especially if you over-tightened the bolts.

shaneb · 2011-10-17, 13:06

Also the transmission pump has two gears, I never seen this before, one spins freely the other doesnt budge by hand in any gear. I dont know if its suposed to move or not. I hope the 4th bolt I havent found yet isnt stuck somewhere in there causing it not to move.

Quote:

Originally Posted by mvw66gt

I would be suspect of someone tearing into it at one point. May have been an issue with the valve body, etc. I don't think those would just fall out. I would definitely go through it before putting it in the car. That would be a lot of work to find out that it was fried. - Matt

shaneb · 2011-10-17, 13:10

If I take the valve body off, what should I be looking for as far as damage and what torque should they be titghened too? Thanks for your help!

Quote:

Originally Posted by PaulS

That box thing is your valve body... same caution applies especially if you over-tightened the bolts.

PaulS · 2011-10-17, 13:12

Time to tear it down....
The inner gear is spun by the converter snout and the other rotates in the housing.
The crescent that separates them can bind the gears if the pump housing is worn.
If the pump is worn then that metal has gone through the converter, transmission and the cooler. Never a good thing. You can chamfer the intake end of the crescent with a die grinder to keep them from binding but if the housing is that worn it may not produce the pressures you need. It still might run but for how long?

shaneb · 2011-10-17, 13:16

I did only try to spin it by hand and not with the converter on. I will try it tonight and see if it does move with converter in place. I will let you know what I find out. Thanks again Paul!

Quote:

Originally Posted by PaulS

Time to tear it down....
The inner gear is spun by the converter snout and the other rotates in the housing.
The crescent that separates them can bind the gears if the pump housing is worn.
If the pump is worn then that metal has gone through the converter, transmission and the cooler. Never a good thing. You can chamfer the intake end of the crescent with a die grinder to keep them from binding but if the housing is that worn it may not produce the pressures you need. It still might run but for how long?

shaneb · 2011-10-18, 09:25

I put the convertor in and it spun perfectly fine torqued the missing bolts to specs, Installed my tranny mount and oil pan. Will install today after work if I have time to see if it works.

Why do I always need one more part?

2011-10-17, 11:42	#1
shaneb Member Join Date: 2009-12-20 Location: Mckinney, Texas Posts: 424 Vehicle(s): 1973 ford maverick iTrader: 0 (50%)	C4 Transmission Just got another C4 transmission and I took the transmission pan off to replace it and the filter. I found 3 bolts inside it, it looks like they came off the top part because it was missing 4 total. I havent installed it yet to see if it works. They screwed back in and there not stripped. From the bolts being off do you think its fried? I guess I will find out once I install it.

2011-10-17, 12:50	#2
PaulS Member extrordiare Join Date: 2004-05-02 Location: Seattle area Posts: 4,858 Vehicle(s): 1966 Mustang, 1972, 73, 73 and 73 Mavericks iTrader: 6 (100%)	If the bolts came off the filter it is probably OK - the oil level is above the filter mounting point - but you may have a warped valvebody so watch for shifting problems. Paul __________________ Paul 1 each 72 2dr., 73 2dr., 73 4dr., 66 Mustang Coupe.

2011-10-17, 12:56	#3
mvw66gt Member Join Date: 2005-01-03 Location: Arthurdale, West By God Virginia Posts: 324 Vehicle(s): 71 Comet GT iTrader: 12 (100%) Images: 35	I would be suspect of someone tearing into it at one point. May have been an issue with the valve body, etc. I don't think those would just fall out. I would definitely go through it before putting it in the car. That would be a lot of work to find out that it was fried. - Matt __________________ 72 Comet and 70 Mustang Grabber Special Package http://www.cardomain.com/id/mvw66gt

2011-10-17, 13:05	#5
PaulS Member extrordiare Join Date: 2004-05-02 Location: Seattle area Posts: 4,858 Vehicle(s): 1966 Mustang, 1972, 73, 73 and 73 Mavericks iTrader: 6 (100%)	That box thing is your valve body... same caution applies especially if you over-tightened the bolts. __________________ Paul 1 each 72 2dr., 73 2dr., 73 4dr., 66 Mustang Coupe.

2011-10-17, 13:12	#8
PaulS Member extrordiare Join Date: 2004-05-02 Location: Seattle area Posts: 4,858 Vehicle(s): 1966 Mustang, 1972, 73, 73 and 73 Mavericks iTrader: 6 (100%)	Time to tear it down.... The inner gear is spun by the converter snout and the other rotates in the housing. The crescent that separates them can bind the gears if the pump housing is worn. If the pump is worn then that metal has gone through the converter, transmission and the cooler. Never a good thing. You can chamfer the intake end of the crescent with a die grinder to keep them from binding but if the housing is that worn it may not produce the pressures you need. It still might run but for how long? __________________ Paul 1 each 72 2dr., 73 2dr., 73 4dr., 66 Mustang Coupe.

2011-10-18, 09:25	#10
shaneb Member Join Date: 2009-12-20 Location: Mckinney, Texas Posts: 424 Vehicle(s): 1973 ford maverick iTrader: 0 (50%)	I put the convertor in and it spun perfectly fine torqued the missing bolts to specs, Installed my tranny mount and oil pan. Will install today after work if I have time to see if it works. Why do I always need one more part?

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