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C4 swap question

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Old 12-07-2007, 12:12 AM
  #1  
mcfomco
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Default C4 swap question

Is the flexplate needed to do the swap a 157 tooth?

I am tired of rebuilding the T5 due to its inability to hold up to the abuse it see's. I have a c4 trans ready to go in but, I am uncertain on which flexplate is needed for the swap. I hope someone here can answer this question for me.
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Old 12-07-2007, 12:41 AM
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Chadwick86
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Default RE: C4 swap question

I used the same flexplate as the AOD that died on my car. Its a 50oz thats all I know for sure lol. 157 sounds right since its a small bell housing. Sorry if I couldn't help yah, good luck on the swap, I hope it treats you like mine has done for me.
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Old 12-07-2007, 09:12 AM
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1990mustanggt
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Default RE: C4 swap question

ORIGINAL: mcfomco

Is the flexplate needed to do the swap a 157 tooth?

I am tired of rebuilding the T5 due to its inability to hold up to the abuse it see's. I have a c4 trans ready to go in but, I am uncertain on which flexplate is needed for the swap. I hope someone here can answer this question for me.
Yes it is a 157 tooth 50 oz flexplate as long as you haven't changed the crank and balancer.
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Old 12-07-2007, 01:24 PM
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uedlose
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Default RE: C4 swap question

the aod flex is 164 they make a big bell for the C-4 and 2 small bells which do you have? is your C-4 pan fill where the dip stick goes or is it in the case? is it a C-4 or a C-5 what year is the trans. you have?
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Old 12-07-2007, 10:56 PM
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mcfomco
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Default RE: C4 swap question

The bolt circle on the convertor is 11 1/2 inches. I have talked with some people locally and they said I need the 164 tooth flex plate. Now I have both in hand and will figure it out soon I guess.
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Old 12-08-2007, 10:22 AM
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dukeme
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Default RE: C4 swap question

If you have a c-4 with the big bell, then 164 50oz is your best bet. small bell is 157...Here is a picture of my c-4 with the big bell. Hope this helps?





[align=left] [/align]
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Old 12-09-2007, 06:50 AM
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uedlose
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Default RE: C4 swap question

That is a pan fillc-4 164.they also have case fill c-4s that has the 164 & 157 and a very small bell fortheold mustang2. then there is the C-5 bell that will bolt to the V8 but it is deeper and can cause problems with the converter fitting in the pump far enough. Also for the above pic. your R sevo is installed wrong.
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Old 12-09-2007, 06:57 PM
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FLcracker9
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Default RE: C4 swap question

ORIGINAL: uedlose

That is a pan fillc-4 164.they also have case fill c-4s that has the 164 & 157 and a very small bell fortheold mustang2. then there is the C-5 bell that will bolt to the V8 but it is deeper and can cause problems with the converter fitting in the pump far enough. Also for the above pic. your R sevo is installed wrong.
I'm going to do the same swap when my AOD takes a crap. I have a pan fill C-4 sitting in the shop, but how can I tell if it's a157 or a 164?. Do bothbellhousings use the same starter?
Thanks
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Old 12-09-2007, 07:38 PM
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uedlose
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Default RE: C4 swap question

I have never seen a 157 tooth bell on a pan fill. Not saying they are not out there I have just never seen one or even heard of one. So I would feel safe to say its a 164 if your Aod flywheel fits inside of it you should be ok.
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Old 12-10-2007, 01:13 AM
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84conversion50
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Default RE: C4 swap question

the c4 transmission is godlike. takes all the abuse i give it. now if only i could find a motor to do the same
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