351w c4 to c6 swap possible? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 01-06-2009, 11:43 AM
Registered User
 
Join Date: Jan 2009
Location: va
Posts: 27
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
351w c4 to c6 swap possible?

Im looking to see if this swap will work or not. I have a 72 mustang grande, 351w with a c4. I have a c6 trans that is with a straight six engine in a truck. I need to replace the trans in the mustang. Question is will the c6 from the truck bolt to the windsor? The bellhousing pattern for the windsor from what I know is the same as the 240-300 straight six engines. Will this c6 bolt to the windsor and be made to work or not? Thanks in advance..

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-06-2009, 12:29 PM
woodz428's Avatar
Troll Hunter
 
Last photo:
Join Date: Sep 2002
Location: Philo,Il
Posts: 2,702
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
All SBF engines use the same bellhousing pattern, not an issue. However, not knowing the truck vintage there may be some mount changes needed, although they can be done with stock parts. Are you sure it is a 351W AND a C4?? All the 351Ws I had in early stangs were FMX trans.I think the sixes and 302s were the only C4 equipped cars by then.........I'll know for sure in a few minutes, since I am in the house and the books are in the shop.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-06-2009, 12:50 PM
galaxieguy3's Avatar
Member
 
Last photo:
Join Date: Sep 2003
Location: Gouverneur, NY
Age: 47
Posts: 170
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Easy way to tell if it is the FMX trans, besides pan shape, is to look at the main center section of the trans. The FMX has a steel case with aluminum bell and tail. C4 to my knowledge is all aluminum. I have swapped a C6 into a FMX application, everything fit no problems at all. The tail end was just a whisker longer on the C6, but not too long that I couldnt use the original driveshaft. I am not sure on the length of the C4 compared to a C6 though. That is easy enough to determine with a measuring tape. You may end up having to pull the pan and change the shift lever up or down. I think floor shift versus column shift determines which direction it goes. Not a big deal. I assume the driveshaft yoke would interchange, but wouldnt swear to it. Not sure if any of this helps you, but good luck.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-06-2009, 12:53 PM
galaxieguy3's Avatar
Member
 
Last photo:
Join Date: Sep 2003
Location: Gouverneur, NY
Age: 47
Posts: 170
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Oh by the way, you may need a 351W-C6 flexplate. The flexplates were different between my FMX and C6. There again not sure about C4 to C6. FYI
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 01-06-2009, 03:40 PM
Registered User
 
Join Date: Jan 2009
Location: va
Posts: 27
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by woodz428
All SBF engines use the same bellhousing pattern, not an issue. However, not knowing the truck vintage there may be some mount changes needed, although they can be done with stock parts. Are you sure it is a 351W AND a C4?? All the 351Ws I had in early stangs were FMX trans.I think the sixes and 302s were the only C4 equipped cars by then.........I'll know for sure in a few minutes, since I am in the house and the books are in the shop.
Yes, it is a 351w and a c4, the 351 though is not the original motor as far as I know, I was told the original was a 302. Then again the guy I got it from thought the engine was a 351c, so im not sure if he is right on it having an original 302.

What about the input shaft from going c4 to c6??


Galaxieguy, all information helps, glad to know it shouldnt be much of a probelm going from column to floor shift that would be one of more questions after I find out for sure it would bolt to the windsor and fit. The c6 trans is in the truck and running and all so I have everything there, if I would have to use anything else maybe..

Im ready to do the swap so I can get this mustang on the road asap I didnt think I would have to do the trans but.. I posted on another forum and was simply told it wont work by a few.. I assume this swap will work???

Thanks
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 01-06-2009, 05:09 PM
eloc431962's Avatar
Evil Wicked Mean And Nasty
 
Last wiki edit: Pilot bearing and bushings
Last journal entry: roof repair
Last photo:
Join Date: Nov 2008
Location: back in the garage.
Posts: 13,762
Wiki Edits: 37

Thanks: 50
Thanked 28 Times in 24 Posts
yes the swap will work c4 to c6 done it but it has been awhile. like galaxieguy said you probably will have to change the flywheel and i am not sure about the drive shaft either. when you get the trans in you can measure to find out hope this helps. cole
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 01-06-2009, 05:24 PM
onebadmerc's Avatar
I need a bucket of arc sparks
 
Last wiki edit: How to identify SB Ford heads without pulling them
Last journal entry: trunk floor
Last photo:
Join Date: Jan 2003
Location: Florence Colorado
Age: 43
Posts: 901
Wiki Edits: 1

Thanks: 0
Thanked 0 Times in 0 Posts
The transmission crossover is different on a C6,FMX equipped 71-73 Mustang. The C4 transmission crossover will not work, you will need one off a C6 or FMX equipped 71-73 Mustang or Cougar. Here is a picture of one on Ebay.
http://cgi.ebay.com/ebaymotors/1971-...2em118Q2el1247
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 01-06-2009, 05:53 PM
eloc431962's Avatar
Evil Wicked Mean And Nasty
 
Last wiki edit: Pilot bearing and bushings
Last journal entry: roof repair
Last photo:
Join Date: Nov 2008
Location: back in the garage.
Posts: 13,762
Wiki Edits: 37

Thanks: 50
Thanked 28 Times in 24 Posts
onebadmerc is right about the crossmember it is different. and dont forget about the shift lever if you are still using the mustang floor shifter.if the c6 is not sit up for the floor you will have to change the shift lever or buy an aftermarket universal floor shifter then it will work.good luck hope everything works out.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 01-07-2009, 10:42 PM
Registered User
 
Join Date: Jan 2009
Location: va
Posts: 27
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
what about the input shaft splines going c4 to c6 or how does that work really?? Im about ready to go forward with it, thanks for the help everyone..
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 01-08-2009, 08:56 AM
Member
 
Last photo:
Join Date: Aug 2003
Location: surrey bc canada
Age: 74
Posts: 642
Wiki Edits: 0

Thanks: 0
Thanked 9 Times in 9 Posts
c6 into mustang

you best be sure that the flex plate you use is correct, 351w is different weight than latter 302sand 5ltrs, other wise you will have a vibration. cliff
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 01-08-2009, 10:04 AM
Registered User
 
Join Date: Jan 2009
Location: va
Posts: 27
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Will this flex plate work for 351w with c6's, link here


http://www.jegs.com/i/B%26amp%3BM/130/40232/10002/-1#

Or will I just need to double check how many teeth?

Thanks!
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 01-08-2009, 10:10 AM
Irelands child's Avatar
Registered User
 
Last wiki edit: Ford engine specifications Last photo:
Join Date: Jan 2005
Location: Upstate New York
Posts: 4,860
Wiki Edits: 8

Thanks: 13
Thanked 185 Times in 166 Posts
Why not just rebuild the C4 and save a bunch of time, expense and fit up headaches? The C4 is easily upgraded and more reasonably then the C6 plus is good for at least 450Hp with minimal outlay.

Here are a couple of interesting Ford trans links:

http://www.fordmuscle.com/forums/c4-...-version2.html

http://raceabilene.com/kelly/hotrod/trans.html

Dave W
__________________
Irelands child
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 01-08-2009, 11:50 AM
Registered User
 
Join Date: Jan 2009
Location: va
Posts: 27
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
It may be more harder but im sure cheaper than rebuilding the c4 professionally. I have the c6 already and I know its good, never had a problem with it in the truck. Plus I dont know what I will be doing to the engine, but it will be built more sometime.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 01-08-2009, 12:30 PM
Irelands child's Avatar
Registered User
 
Last wiki edit: Ford engine specifications Last photo:
Join Date: Jan 2005
Location: Upstate New York
Posts: 4,860
Wiki Edits: 8

Thanks: 13
Thanked 185 Times in 166 Posts
You can do it yourself for ~$240. They are simple - no electronics, no OD - just a few clutches and plates and a bunch of gaskets.

http://store.summitracing.com/partde...5&autoview=sku

Here's one "kit" - and with the Ford manual which I can forward via email(not PM) or you can pull from any early Ford Shop Manual plus the info on the other attachments, no real problems doing a C4......but of course, it's your choice.......

Dave W
__________________
Irelands child
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 01-08-2009, 12:58 PM
woodz428's Avatar
Troll Hunter
 
Last photo:
Join Date: Sep 2002
Location: Philo,Il
Posts: 2,702
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
That trans mount looks the same as the FMX and C6 trans....I think the manual ones too. I have 6 in the shop, the C4 is different. I would verify that it is a 351W, it's easy to tell since the lower intake manifold surface is even with the dist opening on the 302 and about an inch and a quarter above on the 351W. A casting number on the intake will help if you are unsure about the dist reference.If he thought it was a Cleveland and couldn't tell..it may still be a 302. Input splining is irrelevant since you have to use the torque converter that's with the trans. I think that the FMX and C6 use the same bolt pattern on the convertors and will need to check the C4, that's in relation to the same engine, since there are several flexplates depending on the engine.
If you post the engine code from the serial number( I think it's the 5th didgit and it will be a letter surrounded by numbers) it is easy to tell you what was in it originally too.
If you decide to do the swap, PM me and I can tell you all the parts that interchange as well as what you need to replace and from what vehicles. I'll have to look at my manuals after lunch, but that trans mount looks like all the '67 upward for the trans I listed.
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
351w distributor swap problems Jared Engine 2 01-08-2009 09:01 AM
Cam swap Questions wayfast77 Engine 3 10-18-2006 04:52 AM
351w swap dptyscott Engine 7 07-31-2006 06:52 AM
New Ford Guy 37Ford Engine 61 07-18-2006 05:52 PM
351w variable vent. distributor swap Jared Engine 0 10-07-2003 09:54 PM


All times are GMT -6. The time now is 05:23 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.