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Author
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Topic: torque converter probs
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FiveLiterDreamer
Journeyman Posts: 99
From: Conway, AR
Registered: Feb 2001
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posted 08-13-2002 12:42 PM
   
hey i was wondering if ya'll could help me out. I pullled my '78 c4 tranny to replace it with a '67 c4. I had my friend count the splines on the shaft of the tranny and he said they were the same. 24 on the small shaft and 32 on the bigger one. This was good bc i was going to reuse my torque converter. The torque converter slid all the way on and appeared to engage the pump. After i got everything hooked back up and started the car, it was making a nasty noise. i put my hand on the bottom of the tranny and it was vibrating very bad. It also sounded like metal rubbing on metal. you could hear it going into gear, but it was whining real bad. When i gave it gas in gear, it moved, but only about an inch and it sounded even worse. We recounted the shaft on the '78 tranny and counted 26/32 this time. I'm going to tear it down again but i was wondering what i can do to remedy the problem. I believe i've heard that the mustang ii bellhousing and torque converter are unique in size to the mustang ii, and therefore i won't be able to use a larger torque converter that will match the splines of the tranny. Please help. thanx in advance.
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FiveLiterDreamer
Journeyman Posts: 99
From: Conway, AR
Registered: Feb 2001
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posted 08-13-2002 03:35 PM
Okay, i found out that up to '69, the c4 had 24 splines and had a smaller input shaft. from '70 on up, they had 26 splines and a larger input shaft. So what i need to know is if the torque converter sizes are different for the mustang ii compared to other years. thanx
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SteveLaRiviere
Administrator Posts: 33371
From: Saco, Maine
Registered: May 99
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posted 08-13-2002 08:08 PM
You should be able to use a converter from a '70 and newer C4.I would guess that you have trashed the input shaft and you will have lots of metal shavings in the transmission. ------------------
All Fords since 1977!
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FiveLiterDreamer
Journeyman Posts: 99
From: Conway, AR
Registered: Feb 2001
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posted 08-13-2002 09:58 PM
I pulled the tranny again and have found that the input shaft on the tranny is still in good condition. I mounted up the larger style bellhousing to the engine and found that there was enough clearance around the firewall. I can now use this larger bellhousing along with the matching torque converter and flexplate from a 64.5 mustang v8 260 cu. in. engine. My problem now is to get the balance right for the front and back of the engine. What i need to know is how many ounces the harmonic balancer is on the front of my '78 mustang II 302 engine and whether it is compatible w/ the larger flexplate and torque converter balance. thanx
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IIblue74
Gearhead Posts: 163
From: memphis,tn
Registered: Aug 2000
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posted 08-13-2002 11:14 PM
ALL 302's made before '82 (IIRC) used the 28oz. imbalance so the 64.5, 67 and 78 will carry the same balance. If you're using a large bellhousing you will most likely have to use MII exhaust manifolds (no room for headers unless you "customize" them)
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FiveLiterDreamer
Journeyman Posts: 99
From: Conway, AR
Registered: Feb 2001
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posted 08-13-2002 11:34 PM
cool. glad to hear. I will be using the 64.5 260 flexplate and torque converter along with the original '78 harmonic balancer and larger bellhousing. Yes, i will also be using the oringinal mustang ii exhaust manifolds. thanx
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FiveLiterDreamer
Journeyman Posts: 99
From: Conway, AR
Registered: Feb 2001
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posted 08-13-2002 11:35 PM
the 260 is considered the same as the 302 as far as balancing issues are concerned, right??
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IIblue74
Gearhead Posts: 163
From: memphis,tn
Registered: Aug 2000
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posted 08-14-2002 08:28 AM
I should have phrased that "all Windsor small blocks" but yes, 255,260,289,302 and 351.
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