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1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1964 1/2 - 1965 => Topic started by: ptosborn1111 on January 09, 2014, 01:59:22 PM

Title: Define HD rear suspension 65' mustang
Post by: ptosborn1111 on January 09, 2014, 01:59:22 PM
It's me again. ;D I have read some of the threads on suspension questions for the 65'. Still not finding an answer after a couple of yrs of looking. :o Don't kick me on lack of knowledge, however, I haven't found the build sheets for the car but do have the original order and delivery sheets. The order sheet states HEAVY DUTY (HD) suspension. I have a general knowledge of this concept but do not know if it applies to the rear shocks. What was a heavy duty suspension for this car, if anyone may have this on their order/build sheets? I want this car as close to concourse as possible with the exception of safety in the form of front disc brakes. So I need to know what the rear shocks are or if I can replicate these to acceptable concourse level. Oh ya, sorry, the car again! It is an A code 289 65' fastback, 4 spd st.
Thanks again guys!
Title: Re: Define HD rear suspension 65' mustang
Post by: J_Speegle on January 09, 2014, 02:37:00 PM
For a non GT 65 fastback I believe the HD suspension was different, sway bar,  front and rear springs and different shocks (basically a different stock number - other than the engineering number and paint mark they would look the same on the car

Had a very early fastback years ago with the option from best we could tell.
Title: Re: Define HD rear suspension 65' mustang
Post by: Ivygreen65 on January 09, 2014, 02:56:06 PM
HD suspension in 65/66 was known as the Special Handling Package.  As Jeff noted, it consisted of a 13/16" front sway bar, higher rate springs in the front and rear, and different shock absorbers.  A quick ratio steering box was also part of the package.  This package was a standard feature on all 65/66 GT cars. 
Title: Re: Define HD rear suspension 65' mustang
Post by: jwc66k on January 09, 2014, 04:34:10 PM
I ordered the "Special Handling Package" on the 66 Fastback that I special ordered in early 1966. One thing that was most noticeable was that the large diameter of the shaft of the front shocks as it was the same diameter as the HD suspension of the 289 HP package on a Mustang hardtop. That car was sitting next to my Fastback in the dealer's back lot and the hardtop buyer and I picked up our cars at the same time (both cars were Signal Flare Red). I can't answer for the other items (springs, steering, sway bar) as I wasn't into "restoring" in 1966, it was still new.
Jim 
Title: Re: Define HD rear suspension 65' mustang
Post by: ptosborn1111 on January 09, 2014, 05:24:34 PM
Ok! since I am long winded while writing these let me get down to the point. The rear shocks I have on my garage floor are yellow color with a black coil over spring (came off the car and were in a bucket of car parts from this car). I need to find the right rear shocks if these are not correct and what/who sells a concourse acceptable application? And damn it, does anyone feel like coming over and making a punch list of what I should be correcting on this car? It appears to have some nit picky stuff that I am no good at!
Title: Re: Define HD rear suspension 65' mustang
Post by: J_Speegle on January 09, 2014, 05:48:57 PM
Ok! since I am long winded while writing these let me get down to the point. The rear shocks I have on my garage floor are yellow color with a black coil over spring (came off the car and were in a bucket of car parts from this car). I need to find the right rear shocks if these are not correct and what/who sells a concourse acceptable application? And damn it, does anyone feel like coming over and making a punch list of what I should be correcting on this car? It appears to have some nit picky stuff that I am no good at!

No the coil over shocks are not correct for your car.

Don't believe anyone makes an completely correct reproduction. Drake approached us last year about making some shocks though he was not going to stamp them (at least the plan at the time)  and not sure which style of shocks he was going to choice to copy.

For correct shocks your left I believe with used originals or early Nos versions if you can find the correct (engineering numbers) ones.



Ivygreen65
- Thanks for the back up - forgot the steering box difference on non-PS cars . :)
Title: Re: Define HD rear suspension 65' mustang
Post by: ptosborn1111 on January 09, 2014, 06:04:41 PM
Thanks again guys! ;D You've been much help. 8) Guess I will post to want section a set of shocks for this car as well! Oh ya. Does anyone have the numbers on these shocks? Pics of paint marks or anything that points me to correct shocks?
Title: Re: Define HD rear suspension 65' mustang
Post by: J_Speegle on January 09, 2014, 06:09:33 PM
Thanks again guys! ;D You've been much help. 8) Guess I will post to want section a set of shocks for this car as well! Oh ya. Does anyone have the numbers on these shocks? .........

Sorry don't have a 65 MPC and would not want to quote from a later one for the service part number.  Charles and/or the others should be able to help with the engineering number. Remember this is a different number than what will be listed in books and on the box if you find one - its the number that would be stamped on the side of the shock itself
Title: Re: Define HD rear suspension 65' mustang
Post by: PraireBronze on January 09, 2014, 07:07:31 PM
I usually keep my yap shut when I get the urge to make comments like this, but I can't resist this one.  :-X

You're going to put on disc brakes for the sake of safety, and then you're going to put on 50 year old shocks?  And probably used ones?   ::)

I've read and believe that drum brakes, set up correctly, are every bit as good as disc brakes.
Title: Re: Define HD rear suspension 65' mustang
Post by: Ivygreen65 on January 09, 2014, 08:27:09 PM
I've read and believe that drum brakes, set up correctly, are every bit as good as disc brakes.

For a rear application, I would agree.  I would give the nod to discs as being better on the front of the car, though.
Title: Re: Define HD rear suspension 65' mustang
Post by: ptosborn1111 on January 10, 2014, 02:27:30 PM
Good point PraireBronze! However, how does your wife like those manual brakes? Car doesn't stop all that well. This is my wife's car and carries at least one kid at a time. I hope to have 50 yr old REAR shocks (rebuilt to work), looks correct. If you put on power brakes (not correct anyways) why not go all the way with safer front disc? And I'm not sure on this statement? I did mention this car was equipped with a so called "handling package" (heavy duty suspension). Is that not a considerable up graded in handling over the regular suspension for that time period?
I'm not trying to be argumentative, just trying to accommodate for my spouse and keep her in this hobby! Yet allow her to show (have judged) her car with the least amount of deductions as possible.
Thanks for the input   
Title: Re: Define HD rear suspension 65' mustang
Post by: ptosborn1111 on January 10, 2014, 02:37:09 PM
Ivygreen,
As you previously mentioned about the 65-66 GT's having a standard HD suspension! It would then be a fair assumption that I could concentrate on looking at any 65 GT labeled car (within my build date) for donor rear shocks. If this is correct I can narrow my search down.
Title: Re: Define HD rear suspension 65' mustang
Post by: J_Speegle on January 10, 2014, 03:20:33 PM
Ivygreen,
As you previously mentioned about the 65-66 GT's having a standard HD suspension! It would then be a fair assumption that I could concentrate on looking at any 65 GT labeled car (within my build date) for donor rear shocks. If this is correct I can narrow my search down.

Yes though finding a 65-66 GT with original shocks today is going to be a big find.
Title: Re: Define HD rear suspension 65' mustang
Post by: Ivygreen65 on January 10, 2014, 03:56:44 PM
Yes though finding a 65-66 GT with original shocks today is going to be a big rare and expensive find.

Fixed that for you ;)
Title: Re: Define HD rear suspension 65' mustang
Post by: ptosborn1111 on January 10, 2014, 04:21:32 PM
Thanks, I have a lead on one.
Title: Re: Define HD rear suspension 65' mustang
Post by: cobraboy on January 10, 2014, 06:09:52 PM
Before you spend big bucks keep in mind that it is unlikely you will be able to rebuild original shocks, they do not come apart like Konis do.

Title: Re: Define HD rear suspension 65' mustang
Post by: J_Speegle on January 10, 2014, 06:15:59 PM
Before you spend big bucks keep in mind that it is unlikely you will be able to rebuild original shocks, they do not come apart like Konis do.

There is a company that rebuilds original shocks - haven't used them yet

Title: Re: Define HD rear suspension 65' mustang
Post by: 69bossnut on January 11, 2014, 04:46:37 AM
Yes you are correct the original Autolite shocks were not designed to be rebuilt. But I have been able to develope a procees so I can rebuild & restore them to look & function as new. I have the shock part #'s written down at home for the 65 HD option & will post later. Although it will be near impossible to find a NOS set, much less with the correct dates needed. So hopefully someone has an original used set the Pat will be able to have restored.
Title: Re: Define HD rear suspension 65' mustang
Post by: ptosborn1111 on January 11, 2014, 12:35:36 PM
I placed a wanted add for them and have a message out to Jake to call me. Hopefully they are what I am looking for and can use these before I try another source and have to pay bigger just to get shocks and not the whole car. Good luck with that. Thanks again guys, I'll keep reading these posts. Patients are a virtue!
Title: Re: Define HD rear suspension 65' mustang
Post by: livetoride60 on January 11, 2014, 01:07:54 PM
C4ZF-18080-C is the number stamped on mine.  Oct 64 SJ K code, which came with the handling package.  Luckily it's a fastback, and the rear shock top mounts were just hard enough to get to for the PO's laziness factor to kick in.  Been on there all this time. 

"289 High Performance Mustang Guide" 4th Ed by Tony Gregory says for 64.5 / 65 HD suspension shocks would be:

Front: P/N C5ZZ-18124-C, stamped # C4ZF-18045-E
Rear:  P/N C5ZZ-18125-B, stamped # C4ZF-18080-A, B, or C. 

Autolite or FoMoCo painted black, although "some early Ford literature shows bronze shocks".

A couple related threads:

http://www.concoursmustang.com/forum/index.php?topic=268.0 (http://www.concoursmustang.com/forum/index.php?topic=268.0)
http://www.hipomustang.com/hpmx/viewtopic.php?f=11&t=375 (http://www.hipomustang.com/hpmx/viewtopic.php?f=11&t=375)

Title: Re: Define HD rear suspension 65' mustang
Post by: J_Speegle on January 11, 2014, 05:34:02 PM
............. although "some early Ford literature shows bronze shocks".

Believe those would be the Heavy Duty service replacement/over the counter shocks. Saw guys use those allot on restorations in the late 70's into the 80's
Title: Re: Define HD rear suspension 65' mustang
Post by: 69bossnut on January 11, 2014, 08:52:11 PM
These are the part numbers that I was given for the HD option.
C5ZZ-18124-D front
C5ZZ-18125-E rear