• Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech

lowering rear of car w/o blocks (long)

  • Thread starter Thread starter latamud
  • Start date Start date May 10, 2005
Prev
  • 1
  • 2
  • 3
First Prev 3 of 3

zookeeper

Founding Member
Aug 25, 2001
3,415
63
109
Rogue River, Oregon
Jul 18, 2008
#41
  • Jul 18, 2008
  • #41
Just a tip: cutting leafs a great, free way to tune your spring rate, but you really, really need to grind a taper into the leafs so they don't gouge each other. Also, look for rolls of poly plastic sold at street rod chassis places that's designed to go in between leafs to help them slide when assembled. It makes a huge difference and is cheap.
 
O

Opentracker

20+ Year Stangneter
Feb 4, 2004
516
0
16
Jul 19, 2008
#42
  • Jul 19, 2008
  • #42
Good point. Some grinding to smooth them out would be a good idea.
The little slippy things could be made out of a lot of different material and are also a good idea.
Some leaf springs don't have them but most do.
 
G

Grabber70Mach

Member
Jul 6, 2003
305
0
17
Indian Head, MD
Jul 20, 2008
#43
  • Jul 20, 2008
  • #43
Opentracker said:
I've been trying something new with the leaf spring rear. Just for fun, I cut some off the back of each leaf on my new $100 car.
It's a 68 Ranchero and it sat way too high in the rear. I'm to busy to take it apart so I thought, why not cut some like we do on the front. It worked.
These photos are of our 65 Ranchero I just got done doing it too. It lowered the rear about 3/4" with no loss in ride quality or added noise.
I used a pry bar to separate the leafs and used a cut off wheel. Super easy and free. I'm sure it takes away some of the spring rate but that's OK with me.
I only cut the rear, I dont think cutting the front is a good idea.
I'll be doing this some more for sure. It saves a lot of time.




THis is how much I cut off. I cut a lot more off of my 68 Ranchero.
Click to expand...

I was getting ready to do it the original way but this way looks easier. It appears that you cut the same amout off of each leaf. How much did you cut to get the
3/4" drop? Is this alright to do for a street car? Thanks
 
G

Grabber70Mach

Member
Jul 6, 2003
305
0
17
Indian Head, MD
Jul 20, 2008
#44
  • Jul 20, 2008
  • #44
zookeeper said:
Just a tip: cutting leafs a great, free way to tune your spring rate, but you really, really need to grind a taper into the leafs so they don't gouge each other. Also, look for rolls of poly plastic sold at street rod chassis places that's designed to go in between leafs to help them slide when assembled. It makes a huge difference and is cheap.
Click to expand...


When you are talking about grinding a taper, would beveling the top side of the leaf you cut do enough to releave the opportunity for them to gouge each other?
 

zookeeper

Founding Member
Aug 25, 2001
3,415
63
109
Rogue River, Oregon
Jul 20, 2008
#45
  • Jul 20, 2008
  • #45
If by the top side, you mean the top of the lower leaf, then yes, that's what I meant. The sharp edge left by cutting will dig into the next leaf over time, so even a quick pass across it with a grinder is better than nothing.
 
O

Opentracker

20+ Year Stangneter
Feb 4, 2004
516
0
16
Jul 21, 2008
#46
  • Jul 21, 2008
  • #46
Each piece is 8.5" long and yes, it can be done to a street car. Both of the cars I've done it too are street cars.
 
G

Grabber70Mach

Member
Jul 6, 2003
305
0
17
Indian Head, MD
Jul 21, 2008
#47
  • Jul 21, 2008
  • #47
zookeeper said:
If by the top side, you mean the top of the lower leaf, then yes, that's what I meant. The sharp edge left by cutting will dig into the next leaf over time, so even a quick pass across it with a grinder is better than nothing.
Click to expand...


Yes that is what I meant, Thanks for the info.
 
G

Grabber70Mach

Member
Jul 6, 2003
305
0
17
Indian Head, MD
Jul 21, 2008
#48
  • Jul 21, 2008
  • #48
Opentracker said:
Each piece is 8.5" long and yes, it can be done to a street car. Both of the cars I've done it too are street cars.
Click to expand...


Thanks I was planning to do it the other way that you told me about, But after seeing you do it this way I might just try it a little sooner than I had planned.
 
O

Opentracker

20+ Year Stangneter
Feb 4, 2004
516
0
16
Jul 21, 2008
#49
  • Jul 21, 2008
  • #49
It does soften up the spring rate so be carful how much you cut off. My $100 - '68 Ranchero was a option car with heavy duty suspension, it has 5 leafs from the factory. Way too much IMO and sat way too high and rode way too stiff.
 
6

65pony200

New Member
Mar 9, 2009
1
0
0
Mar 9, 2009
#50
  • Mar 9, 2009
  • #50
Pictures of procedure

I have some pictures of the procedure to reverse the springs. I didn't buy another set of spring as there was an extra full length spring installed by a previous owner. I lowered the car from 16.5" to 13.5" by reversing the middle and smallest spring.

Picasa Web Albums - Jorge - Lowering BackEnd
 

latamud

Founding Member
Oct 22, 2002
791
2
19
Tampa, FL
Apr 15, 2009
#51
  • Apr 15, 2009
  • #51
65pony200 said:
I have some pictures of the procedure to reverse the springs. I didn't buy another set of spring as there was an extra full length spring installed by a previous owner. I lowered the car from 16.5" to 13.5" by reversing the middle and smallest spring.

Picasa Web Albums - Jorge - Lowering BackEnd
Click to expand...

Thanks for the pics. This thread is almost 4 years old and still getting attention. This is one of my favorite mods.

Before


After
 

uk66fastback

New Member
Jul 24, 2006
16
0
0
May 3, 2009
#52
  • May 3, 2009
  • #52
What do you do about the clamps that are on the spring, just reuse them? How easy are they to get off and then replace?

I have just put new 41/2 leaf reverse eye springs on my 66 fastback and I have a massive gap like you had - don't want to use the blocks if possible.

Do I just reverse two springs on the springs I have or use more leaves - it's a bit unclear.
 

latamud

Founding Member
Oct 22, 2002
791
2
19
Tampa, FL
May 4, 2009
#53
  • May 4, 2009
  • #53
uk66fastback said:
What do you do about the clamps that are on the spring, just reuse them? How easy are they to get off and then replace?

I have just put new 41/2 leaf reverse eye springs on my 66 fastback and I have a massive gap like you had - don't want to use the blocks if possible.

Do I just reverse two springs on the springs I have or use more leaves - it's a bit unclear.
Click to expand...

Before you try this mod with reverse eye springs try loosening the front mount bolt and the shackles just a little so nothing falls apart, keep the nuts threaded on, drive the car maybe 1 kilometer and it will possibly settle. My guess is you had the car jacked up and tightened everything up then lowered the car. The bushings can bind and keep the car in the air some.

Otherwise, we add a leaf or two to lower the cars, but it is a fine tuning process. If at first you don't succeed, try try again. The clamps already on the leafs I remove. You can cut them off or work them loose with a pair of vicegrips. I use the bolt on clamps to finish it.
 

uk66fastback

New Member
Jul 24, 2006
16
0
0
May 4, 2009
#54
  • May 4, 2009
  • #54
Thanks for the reply. I can't drive the car as it has no engine in it!

I had the car on axle stands, replaced the spring each side and left the bolts front and back quite loose, then put the wheels back on and let the car settle for a bit - however, there is no weight in the car at all - no glass, no interior, no full gas tank, no seats etc, engine, gearbox etc.

I should maybe get all that in and then access the height. I am not against using 1" oowering blocks if I have to - the car is s weekend cruiser and so wheel hop ain't gonna be a problem - it's not like it's going to ripped at the track.

Do you think all the weight of everything once back in will have an effect?
 

latamud

Founding Member
Oct 22, 2002
791
2
19
Tampa, FL
May 4, 2009
#55
  • May 4, 2009
  • #55
uk66fastback said:
Thanks for the reply. I can't drive the car as it has no engine in it!

I had the car on axle stands, replaced the spring each side and left the bolts front and back quite loose, then put the wheels back on and let the car settle for a bit - however, there is no weight in the car at all - no glass, no interior, no full gas tank, no seats etc, engine, gearbox etc.

I should maybe get all that in and then access the height. I am not against using 1" oowering blocks if I have to - the car is s weekend cruiser and so wheel hop ain't gonna be a problem - it's not like it's going to ripped at the track.

Do you think all the weight of everything once back in will have an effect?
Click to expand...

Well, in your case if you only want 1" I would say a block should be fine. For this mod, we're looking around 3" where a lowering block can mean trouble. I am not sure about the weight difference. I will say old out to see if the added weight does make a difference but with new springs I'm doubtful. Tire size makes a difference as well, a taller tire is going to fill the gap more than a shorter one, but at the same time raises the car. Finish the car off and then with the suspension at ride height crawl under there and tighten everything up. From there decide, mod the leafs or short lowering blocks.
 
D

Dr_Pain

New Member
Apr 5, 2005
69
0
0
May 21, 2009
#56
  • May 21, 2009
  • #56
Subscribed. Me like technical discussion
 
M

mmi

New Member
Dec 28, 2008
27
1
0
Dec 19, 2009
#57
  • Dec 19, 2009
  • #57
Another possible lowering 'tweak'?

I have 4 1/2 leafs and the front is lowered by 1". The back is just a bit too high IMO.

So I was thinking of sliding these in between the perch and the leafs just to lower it by the thickness of these plates (about 3/16"?)

I would turn the tie downs toward the rear, angling 'up' inside the leafs...

Mustang Parts from Mustangs Plus*::*Suspension and Handling*::*Spring Plates*::*1965-73 Tie Down Plate
 

Attachments

  • 01312lg.webp
    8 KB · Views: 248

zookeeper

Founding Member
Aug 25, 2001
3,415
63
109
Rogue River, Oregon
Dec 19, 2009
#58
  • Dec 19, 2009
  • #58
I doubt your eye would even know the difference. A 1" block is actually a fairly small drop and if it's too much, you can have a machine shop mill off 1/2" and re-install them. But to try for 3/16" I wouldn't spend the time and effort for the tiny amount of change.
 

latamud

Founding Member
Oct 22, 2002
791
2
19
Tampa, FL
Dec 19, 2009
#59
  • Dec 19, 2009
  • #59
And $60 to boot, you could buy a lot of scrap steel and drill a bunch of holes in it and make those if you're not going to use them as tie downs.
 
O

Opentracker

20+ Year Stangneter
Feb 4, 2004
516
0
16
Dec 20, 2009
#60
  • Dec 20, 2009
  • #60
You could just cut the middle out of a couple of leafs and add them to the top of the leaf pack. That would give you adjustment in small amounts.

I tore the leafs apart again in our 66 coup to change the ride height by 1/2".
 
Prev
  • 1
  • 2
  • 3
First Prev 3 of 3
You must log in or register to reply here.

Similar threads

J
Exhaust manifold to Y-pipe nut & stud dimensions?
  • joeybuddy96
  • Jul 7, 2026
  • SN95 V6 Mustang Tech
Replies
2
Views
86
SN95 V6 Mustang Tech Jul 9, 2026
joeybuddy96
J
B
water pump installation questions
  • B0udreaux
  • Feb 5, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
38
Views
2K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Feb 28, 2026
General karthief
O
SOLD FS: 18" FR500 chrome wheels and Toyo tires
  • optionizerSS
  • May 21, 2026
  • Other Classifieds
Replies
1
Views
125
Other Classifieds Jun 2, 2026
optionizerSS
O
6
Hey all,I’m putting together a 302 for my 1968 Mustang and wanted to post the combo + some questions to make sure I’m not missing crucial
  • 68_Disgustang
  • Feb 22, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
4
Views
966
1965 - 1973 Classic Mustangs -General/Talk- Jun 20, 2026
gray owl
G
Resolved 93 Mustang 5.0 - Cranks but does not start
  • dan50
  • Jul 18, 2026
  • Fox 5.0 Mustang Tech
Replies
6
Views
168
Fox 5.0 Mustang Tech Jul 18, 2026
dan50
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?