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Tolerance for C6 Forward drum

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Old Apr 13, 2008 | 07:45 AM
  #16  
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Originally Posted by NumberDummy
This part?

C6AZ-7D070-B .. Parking Pawl Return Spring

Ford calls it a spring, it's a curved plate with 8 notches in it.
yup it has 8 notches in it but it's not the return spring...
here is the park paw setup and spring..
 
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Old Apr 13, 2008 | 07:57 AM
  #17  
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I have built hundreds if not thousands and never used the wavy in the forward drum and never had a harsh engagement.
 
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Old Apr 13, 2008 | 08:08 AM
  #18  
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wow thousands of them... I only built a few, you da man!.. maybe it is something else causing the harsh engagement....but that wavy as you call it is the only thing I left out....So you rebuild them for a living or something, and is it common for you to leave parts out when you rebuild a trans? just wondering thats all......
 
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Old Apr 13, 2008 | 08:36 AM
  #19  
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Originally Posted by HemiEater
wow thousands of them... I only built a few, you da man!.. maybe it is something else causing the harsh engagement....but that wavy as you call it is the only thing I left out....So you rebuild them for a living or something, and is it common for you to leave parts out when you rebuild a trans? just wondering thats all......
Yes I build transmissions for a living, since 1964 and retired from it after 40 years.

I am not sure if you are attempting to be nasty or funny with your statement of leaving out parts.

Manufacturers install some parts for customer demand or for something to brag about to increase sales that don't really work that well.
The wavy spring in the forward clutch is one.
There are shift kits used and quite often an item or items are omitted.
Modifications are made to the cooler supply and return.
Holes are drilled to enhance a shift or supply better lubrication to a certain area.
Holes are also drilled in drums to exhaust residual fluid.
As for a harsh engagement allowing too much clearance is one cause.
That's why I never go over .005 clearance per fibre plate in the forward drum.
With a forward 5 fibre drum @.005 per plate gives .025 clearance.
Increase that to .008 and you have .040.
.012 and you are at .060, nearly 1/16".
Clearance in the direct drum can and should be a bit more because of the terrific speed at which the fibre plates are spinning when in first or second.
The extra clearance there helps to prevent partial application or drag due to residual fluid in the drum.
The Ford number of the wavy spring, which was introduced in 1976.

D6AZ-7E085-B
As for slamming into reverse the omitted wavy in the forward drum has diddly squat to do with it.
In reverse the rear and direct clutch are engaged. The forward clutch adds nothing.
 
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Old Apr 13, 2008 | 11:16 AM
  #20  
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So why would mine slam into gear.. it does it in any gear forward or reverse. I thought it was because I took the wavy out... sorry i blew up like that, it just made sense. Learn something new everyday. I also have a 2000 stall converter I would think it would soften the engagement but it slams into drive or reverse idles about 900rpms
 
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Old Apr 13, 2008 | 12:46 PM
  #21  
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Appology accepted. It takes a man to do that.

There are several causes for slamming into gear.
High engine idle, but you have a slightly higher stall convertor so that may not be a factor.

Loose drive line components, ujoints, differential, axles, etc.
Collapsed mounts, engine and transmission.

Or the line pressure may be too high.
If you went hog wild with the shift kit installation that can also be a factor.

Hmmmmmmmm, I don't remember you saying anything about a shift kit.

If you did I hope it wasn't an (elpukeo) B&M.
 
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Old Apr 13, 2008 | 01:24 PM
  #22  
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it has a kit ... just not sure which one... it was in the VB when I took it out of one of the C6s I had...
 
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Old Apr 14, 2008 | 02:59 AM
  #23  
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Originally Posted by stuart1
The Ford number of the wavy spring, which was introduced in 1976: D6AZ-7E085-B
D6AZ-7E085-B .. Forward Clutch Pressure Spring / 4 teeth in a 26 tooth blank.
---------------------------------------------------------------------------
Use before 12/15/77.

D6AZ-7E085-A .. Reverse Clutch Pressure Spring / 6 7/8" O.D. -5 21/32" I.D. / 6 waves evenly spaced.
--------------------------------------------------------------------------------------------------
Use after 12/15/77.

D8AZ-7E085-A .. Reverse Clutch Pressure Spring / 6 7/8" O.D. -5 49/64" I.D. / 8 waves equally spaced.
 
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Old Apr 14, 2008 | 03:22 AM
  #24  
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Originally Posted by NumberDummy
This part?

C6AZ-7D070-B .. Parking Pawl Return Spring it's NOT a curved plate with 8 notches in it.
I screwed up. There's too many D's and B's in C6 trans p/n's.

C6AZ-7B070-B .. Forward Clutch Disc Pressure Spring = it's a curved plate with 8 notches in it.
 
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Old Apr 14, 2008 | 03:26 AM
  #25  
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so there is more than just one wavy?
 
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Old Apr 14, 2008 | 03:45 AM
  #26  
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Originally Posted by HemiEater
so there is more than just one wavy?
It's hard to explain parts...especially trans parts, when ppl can't see them.

I'll email Mil1ion (edit: I just did) and ask him to post the C6 parts illustration in this thread.

He has the catalog on a CD, I'm using microfiche.

Section A70.2 / Page 1.
 
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Old Apr 14, 2008 | 03:59 AM
  #27  
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Originally Posted by HemiEater
so there is more than just one wavy?
7E085: Reverse clutch shows two part numbers

Post #23: Use before and after 12/15/77.
 
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Old Apr 14, 2008 | 04:06 AM
  #28  
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Old Apr 14, 2008 | 04:23 AM
  #29  
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That pic doesn't have the detail the parts catalog pic does.

#39 is C6AZ-7B070-B, to the right the snap ring / the forward clutch pressure spring (not shown in this pic) / the forward clutch pressure plate.

Reverse clutch pressure spring (also missing from this pic) goes between the low-reverse clutch pack and the snap ring.
 
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Old Apr 14, 2008 | 07:54 AM
  #30  
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That's a generic parts illustration and like number dummy said does not show all the parts.

Some versions did have a wavy in the low/reverse clutch pack.
 
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