C4 Confused....advice needed
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Mountain Pass
Joined: Aug 2006
Posts: 149
Likes: 1
C4 Confused....advice needed
I have a C4 I recently picked up to put behind my old 289. I had a working transmission with some leaks so I picked up a new rebuilt C4 for my ride:
number I found on the new transmision:
C4OP-70027-A
C4AP-7A040-C
C6DP-7006A
I tried to install this transmission and there seems to be a gap from the bellhousing to the engine block. So I removed the rebuilt torque converter it seems to be a little bit larger then the previous one (1/4"). I tried to install the trans (with the old torque converter) and again seems like less of an issue but still not bolting on tight to the engine. So I dropped the trans again and installed the original bellhousing and torque converter on the new C4 and still it is not tight against the engine block. I have installed and removed this trans at least 6 times in the last week so I know the converter is seated tight as possible and I have had more then one person check it. Currently the transmission is in the car and there is a 1/4" to 3/8" gap from the block to the bellhousing. The plate between the engine and the bellhousing is pushing out from the torque converter into the flexplate.
numbers on old trans:
C5AP-7006B
C4AP-7A040-0-B
C40P-7D027-A
I have come up with the conclusion that the input shaft on the converter must be a different length on this new transmission.
WHAT THE HECK IS GOING ON?
Craig
number I found on the new transmision:
C4OP-70027-A
C4AP-7A040-C
C6DP-7006A
I tried to install this transmission and there seems to be a gap from the bellhousing to the engine block. So I removed the rebuilt torque converter it seems to be a little bit larger then the previous one (1/4"). I tried to install the trans (with the old torque converter) and again seems like less of an issue but still not bolting on tight to the engine. So I dropped the trans again and installed the original bellhousing and torque converter on the new C4 and still it is not tight against the engine block. I have installed and removed this trans at least 6 times in the last week so I know the converter is seated tight as possible and I have had more then one person check it. Currently the transmission is in the car and there is a 1/4" to 3/8" gap from the block to the bellhousing. The plate between the engine and the bellhousing is pushing out from the torque converter into the flexplate.
numbers on old trans:
C5AP-7006B
C4AP-7A040-0-B
C40P-7D027-A
I have come up with the conclusion that the input shaft on the converter must be a different length on this new transmission.
WHAT THE HECK IS GOING ON?
Craig
Cranky Old Guy
Joined: Mar 2008
Posts: 3,562
Likes: 6
From: Raphine, Virginia
I have a C4 I recently picked up to put behind my old 289. I had a working transmission with some leaks so I picked up a new rebuilt C4 for my ride:
number I found on the new transmision:
C4OP-70027-A
C4AP-7A040-C
C6DP-7006A
I tried to install this transmission and there seems to be a gap from the bellhousing to the engine block. So I removed the rebuilt torque converter it seems to be a little bit larger then the previous one (1/4"). I tried to install the trans (with the old torque converter) and again seems like less of an issue but still not bolting on tight to the engine. So I dropped the trans again and installed the original bellhousing and torque converter on the new C4 and still it is not tight against the engine block. I have installed and removed this trans at least 6 times in the last week so I know the converter is seated tight as possible and I have had more then one person check it. Currently the transmission is in the car and there is a 1/4" to 3/8" gap from the block to the bellhousing. The plate between the engine and the bellhousing is pushing out from the torque converter into the flexplate.
numbers on old trans:
C5AP-7006B
C4AP-7A040-0-B
C40P-7D027-A
I have come up with the conclusion that the input shaft on the converter must be a different length on this new transmission.
WHAT THE HECK IS GOING ON?
Craig
number I found on the new transmision:
C4OP-70027-A
C4AP-7A040-C
C6DP-7006A
I tried to install this transmission and there seems to be a gap from the bellhousing to the engine block. So I removed the rebuilt torque converter it seems to be a little bit larger then the previous one (1/4"). I tried to install the trans (with the old torque converter) and again seems like less of an issue but still not bolting on tight to the engine. So I dropped the trans again and installed the original bellhousing and torque converter on the new C4 and still it is not tight against the engine block. I have installed and removed this trans at least 6 times in the last week so I know the converter is seated tight as possible and I have had more then one person check it. Currently the transmission is in the car and there is a 1/4" to 3/8" gap from the block to the bellhousing. The plate between the engine and the bellhousing is pushing out from the torque converter into the flexplate.
numbers on old trans:
C5AP-7006B
C4AP-7A040-0-B
C40P-7D027-A
I have come up with the conclusion that the input shaft on the converter must be a different length on this new transmission.
WHAT THE HECK IS GOING ON?
Craig
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