Difference b/t 67-72 Lowered Springs and 73-87 Lowered Springs? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

5150 · 07-25-2011, 07:10 PM

Are there any difference? My 72 suburban has 73-87 Control arms, but has 6102-2 on the coil springs, which are 2 inch dropped. The number appears to be for 67-72. It's got me confused. I'm about to buy some drop spindles and want to get the correct ones.

Tx Firefighter · 07-25-2011, 09:20 PM

The springs are fully interchangeable.

**lolife99** · 07-25-2011, 09:26 PM

Quote:

Originally Posted by Tx Firefighter

The springs are fully interchangeable.

x2.

5150 · 07-25-2011, 09:33 PM

Thanks guys, I thought so, but alot of websites have different part numbers
Posted via Mobile Device

Tx Firefighter · 07-25-2011, 09:35 PM

That I have never understood either. The spring vendors could sell more springs if they'd catalog them correctly as to heir fitment. 63-87 trucks and 63-91 Suburban springs all interchange.

5150 · 07-25-2011, 09:39 PM

What's the difference on the spindles then? Mine are 1 inch thick.
Posted via Mobile Device

Tx Firefighter · 07-25-2011, 09:42 PM

Lower balljoints fit 71-87, but uppers are 71-72 and 73-87 fitment. All 71-72 trucks used the 1.25 inch thick rotors. The early 73 and newer trucks also all used the same thick rotors. In the middle of the 73-87 range, GM started using the 1 inch rotors on some trucks but still continued with the 1.25 rotors on other trucks.

All that is from memory. If I'm wrong about any specifics, Keith will be along shortly to straighten it out.

5150 · 07-25-2011, 09:53 PM

Seems like there's less of a selection of spindles for the 1 inch rotors.
Posted via Mobile Device

**lolife99** · 07-25-2011, 10:34 PM

Quote:

Originally Posted by Tx Firefighter

Lower balljoints fit 71-87, but uppers are 71-72 and 73-87 fitment. All 71-72 trucks used the 1.25 inch thick rotors. The early 73 and newer trucks also all used the same thick rotors. In the middle of the 73-87 range, GM started using the 1 inch rotors on some trucks but still continued with the 1.25 rotors on other trucks.

All that is from memory. If I'm wrong about any specifics, Keith will be along shortly to straighten it out.

Ha.
You have a perfect memory!

The 73-87 spindles are the only spindles that can be ordered to fit the 1" rotors.
If you need calipers and bearings,... as well as new rotors,... switch to the HD 1.25" wide version.

mo1968 · 04-09-2012, 04:28 PM

Are lowering coils from 1960- 1972 and the lowering coil form 1973- 1987 the same as well? I have a stock 72 front end. Websites have the 1960-1972 front lowering coils priced higher.

Tx Firefighter · 04-09-2012, 05:01 PM

63-87 all interchange but there are no 60-62 front coil springs. Those trucks used torsion springs rather than coils.
Posted via Mobile Device

07-25-2011, 07:10 PM	#1
5150 C10 Club Tennessee Join Date: Mar 2003 Location: White House, TN 37188 Posts: 8,281	Difference b/t 67-72 Lowered Springs and 73-87 Lowered Springs? Are there any difference? My 72 suburban has 73-87 Control arms, but has 6102-2 on the coil springs, which are 2 inch dropped. The number appears to be for 67-72. It's got me confused. I'm about to buy some drop spindles and want to get the correct ones. __________________ Bryan www.gmtruckshow.com Project "Andes"-Halen's First Truck Project: Patina Burb for he is God’s servant for your good. But if you do wrong, be afraid, for he does not bear the sword in vain. For he is the servant of God, an avenger who carries out God’s wrath on the wrongdoer. Romans 13:4

07-25-2011, 09:20 PM	#2
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Difference b/t 67-72 Lowered Springs and 73-87 Lowered Springs? The springs are fully interchangeable. __________________ I'm on the Instagram- @Gearhead_Kevin

07-25-2011, 09:33 PM	#4
5150 C10 Club Tennessee Join Date: Mar 2003 Location: White House, TN 37188 Posts: 8,281	Re: Difference b/t 67-72 Lowered Springs and 73-87 Lowered Springs? Thanks guys, I thought so, but alot of websites have different part numbers Posted via Mobile Device __________________ Bryan www.gmtruckshow.com Project "Andes"-Halen's First Truck Project: Patina Burb for he is God’s servant for your good. But if you do wrong, be afraid, for he does not bear the sword in vain. For he is the servant of God, an avenger who carries out God’s wrath on the wrongdoer. Romans 13:4

07-25-2011, 09:35 PM	#5
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Difference b/t 67-72 Lowered Springs and 73-87 Lowered Springs? That I have never understood either. The spring vendors could sell more springs if they'd catalog them correctly as to heir fitment. 63-87 trucks and 63-91 Suburban springs all interchange. __________________ I'm on the Instagram- @Gearhead_Kevin

07-25-2011, 09:39 PM	#6
5150 C10 Club Tennessee Join Date: Mar 2003 Location: White House, TN 37188 Posts: 8,281	Re: Difference b/t 67-72 Lowered Springs and 73-87 Lowered Springs? What's the difference on the spindles then? Mine are 1 inch thick. Posted via Mobile Device __________________ Bryan www.gmtruckshow.com Project "Andes"-Halen's First Truck Project: Patina Burb for he is God’s servant for your good. But if you do wrong, be afraid, for he does not bear the sword in vain. For he is the servant of God, an avenger who carries out God’s wrath on the wrongdoer. Romans 13:4

07-25-2011, 09:42 PM	#7
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Difference b/t 67-72 Lowered Springs and 73-87 Lowered Springs? Lower balljoints fit 71-87, but uppers are 71-72 and 73-87 fitment. All 71-72 trucks used the 1.25 inch thick rotors. The early 73 and newer trucks also all used the same thick rotors. In the middle of the 73-87 range, GM started using the 1 inch rotors on some trucks but still continued with the 1.25 rotors on other trucks. All that is from memory. If I'm wrong about any specifics, Keith will be along shortly to straighten it out. __________________ I'm on the Instagram- @Gearhead_Kevin

07-25-2011, 09:53 PM	#8
5150 C10 Club Tennessee Join Date: Mar 2003 Location: White House, TN 37188 Posts: 8,281	Re: Difference b/t 67-72 Lowered Springs and 73-87 Lowered Springs? Seems like there's less of a selection of spindles for the 1 inch rotors. Posted via Mobile Device __________________ Bryan www.gmtruckshow.com Project "Andes"-Halen's First Truck Project: Patina Burb for he is God’s servant for your good. But if you do wrong, be afraid, for he does not bear the sword in vain. For he is the servant of God, an avenger who carries out God’s wrath on the wrongdoer. Romans 13:4

04-09-2012, 04:28 PM	#10
mo1968 Registered User Join Date: Sep 2008 Location: Ontario, Canada Posts: 34	Re: Difference b/t 67-72 Lowered Springs and 73-87 Lowered Springs? Are lowering coils from 1960- 1972 and the lowering coil form 1973- 1987 the same as well? I have a stock 72 front end. Websites have the 1960-1972 front lowering coils priced higher.

04-09-2012, 05:01 PM	#11
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Difference b/t 67-72 Lowered Springs and 73-87 Lowered Springs? 63-87 all interchange but there are no 60-62 front coil springs. Those trucks used torsion springs rather than coils. Posted via Mobile Device __________________ I'm on the Instagram- @Gearhead_Kevin

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.