C4-C5 trans/bell housings and converter swaping ?

I'm trying to help a friend on this, he's using a c5 trans behind his 351w in his fairmont and he has a converter he wants to try but its for a pan fill c4 tci #462000 its the one i listed on here. The other day a trans guy said he can use this converter with his c5 trans as long as he uses a c4 164 tooth flexplate and bellhousing, anybody heard of this or have any info on this ?

Your right they are diffrent but the splines on the c5 are the same as the pan fill c4. The thing is the c5 bell and converter are wider or i should say deeper front to back thus the need for a 164th bell which is narrower front to back. We tried the converter back in february when we put the motor in and it fit in the c5 but i could see that it wasent even close to bolting it too the flexplate without having to pull it out of the tranny too far, and the only other bell i had to try was a 157th but had no flexplate for it. I just dont want to see him buy a 164th bellhousing and findout it aint gonna work either, it seems like it would work but i never messed with this kind of swap, the only c4's i've used are the small 141th mustang two flexplate and bell housing.

is a c5 not just a c4 with a pan fill?

No a c5 is a case fill also ,it began production in 81 and superseded the c4 in 82, it says the c5 is a modernized version of the c4 with a lockup converter which is what he is using for now and its monster converter. I guess were gonna give it a try i was just hoping to hear that someone else has done it before.

The pan fill is not a C-5 it is what Ford called their C-4 s . The 70 and up C-4's were all 26 spline . The c-5 has a different pan that is about 2 qts deeper, the bell housing is deeper from back of flywheel to front pump and larger in diameter. The bell housing on the C-5 is bolted on with the with the front pump bolts like the case fill C-4. The pan fill only has one size bell and flywheel set up which is 164 teeth. the C-5 can have the bell removed and a c-4 bell with either 164 or 157 tooth flywheel.

One other note about the C-5 it will not only have a deeper pan but the valve body is different than any of the c-4 valve bodies . good luck!

whitefield wrote:The pan fill is not a C-5 it is what Ford called their C-4 s . The 70 and up C-4's were all 26 spline . The c-5 has a different pan that is about 2 qts deeper, the bell housing is deeper from back of flywheel to front pump and larger in diameter. The bell housing on the C-5 is bolted on with the with the front pump bolts like the case fill C-4. The pan fill only has one size bell and flywheel set up which is 164 teeth. the C-5 can have the bell removed and a c-4 bell with either 164 or 157 tooth flywheel.

One other note about the C-5 it will not only have a deeper pan but the valve body is different than any of the c-4 valve bodies . good luck!

i know i have a 26 spline but the bell dont bolt on with the pump.it had a sb bell when i got it and i put the bb on it.it's had lots of converters in it,even c6,and some fit easier than others.last time it was down i got a drum from a c5,i thought,and changed out the thick steel in it for a couple more clutches and thin steels.i always thought they were all about alike,inside anyway.

Thanks whitefield thats what i wanted to hear, so the guy we talked too is right about the swap. Last year my buddy put a new tci c4 valvebody in it along with a full rebuild so he's good to go he just wants to try a converter finaly. And cool40 you have the early c4 that the bell bolts on to the trans case the later ones bolt to the pump like this c5, i just had the same friend i'm helpin give me a pan fill c4 and i've had a bell from a 351m for a while so now i can bolt it to a 460 one day to try. Thanks Guys for the info.

I just got done building (having built) a C-5 which has the Pan fill dip stick. I just bolted my bell from the C-4 right to it. I don't think they made a C-5 that wasn't a pan fill deal.

ace

all pan fill trans where c-4 s which were in 69 up ford trucks and 78 77 ford cars with the 400 and 351m . Their are other vehicles I am sure that they were in that I didn't list . The c-5 was not introduced until around late 1980 or early 81.

whitefield wrote:all pan fill trans where c-4 s which were in 69 up ford trucks and 78 77 ford cars with the 400 and 351m . Their are other vehicles I am sure that they were in that I didn't list . The c-5 was not introduced until around late 1980 or early 81.

Your right all pan fill's were c4's they didnt make a pan fill c5. So powerstroke if your dipstick tube fits into the pan and not the case you got a c4.

nuclearcobra wrote:

whitefield wrote:all pan fill trans where c-4 s which were in 69 up ford trucks and 78 77 ford cars with the 400 and 351m . Their are other vehicles I am sure that they were in that I didn't list . The c-5 was not introduced until around late 1980 or early 81.

Your right all pan fill's were c4's they didnt make a pan fill c5. So powerstroke if your dipstick tube fits into the pan and not the case you got a c4.

Powerstroke i stand corrected i was wrong you are right they did make c5's both in case fill and pan fill.

I KNOW in the pan fill.......... I'm glad you now know as well


Ace

I beg to differ, i have a c5 with the fine threaded rear band adjuster and 1/4 ; bigger cooler passages and the factory 8 thrust washer lube hole amd c5 pump with the newer stater oiling with a factory panfill and the extra flange for big bell. I have only seen one and it has a E something pt# for 80s, I was happy to find it because i needed the deeper pan and I wanted the newer mods and high drum for extra clutches.

Ed501 wrote:I beg to differ, i have a c5 with the fine threaded rear band adjuster and 1/4 ; bigger cooler passages and the factory 8 thrust washer lube hole amd c5 pump with the newer stater oiling with a factory panfill and the extra flange for big bell. I have only seen one and it has a E something pt# for 80s, I was happy to find it because i needed the deeper pan and I wanted the newer mods and high drum for extra clutches.

And you beg to differ about what ?

Do you guys have any pics of the c-5 that is pan filled? The front band or intermediat band adjustment on a true c-5 is fine thread and not the rear band adjuster. The pan fill transmissions were called a c4 and not c5. Ford also made a c-4 semi - automatic with a code of PEG-A for 1970 and PEG-A1 for 1971. c-4 has 11in converter.

The c-5 has has a 12in lock -up torque converter, and a valve body change that the converter relief valve has been moved from the reactor support in the pump assembly to the valve body.

c-5 truck code or f150 is PEA-CU 6-300 cid engine

I hope this helps and if you have any pics please send

Sorry, i didnt see where it was said there was a c5 pan fill . Also it does have the front fine thread adjuster not rear, i got to start going to bed earlier

Theres good info at www.monster-c4-thread-tech

So, what if you dont have a converter releif valve no more since you used a manual valvbdy in a c-5 and the c-5 pump. I heard stall might just be looser , does it hurt anything?