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#1 |
Registered User
Join Date: Nov 2009
Location: Cremona AB Canada
Posts: 370
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I get a little riled when ever I hear about somebody taking one of the best rear suspension systems (the trailing arm system) out of a truck and replacing it with some "car" set up. Tme highest level nascar "stock cars " run "truck arms for a reason, The 60-72 GM coil trucks with the right spring rates etc and some tires would make most sports cars look like they were driving on ice.
I just had to get this off my chest
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62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) ![]() ![]() ![]() ![]() |
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#2 |
1961 crewcab
Join Date: Dec 2007
Location: missoula, mt
Posts: 6,164
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Re: 60-72 rear suspension
you can actually buy a kit for a 567 chev car that converts it to a truck arm style suspension. nascar style
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60 build: http://67-72chevytrucks.com/vboard/s...d.php?t=280904 61 crew build: http://67-72chevytrucks.com/vboard/s...d.php?t=646830 63 build: http://67-72chevytrucks.com/vboard/s...d.php?t=336537 64 'burb build: http://67-72chevytrucks.com/vboard/s...d.php?t=448681 65 'burb build: http://67-72chevytrucks.com/vboard/s...d.php?t=590715 65 build: http://67-72chevytrucks.com/vboard/s...d.php?t=281955 |
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#3 |
60-66 Nut
![]() ![]() Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,247
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Re: 60-72 rear suspension
Hot Rods to Hell makes kits for converting most popular cars to truck arms.
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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#4 |
Registered User
Join Date: Feb 2008
Location: WA
Posts: 189
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Re: 60-72 rear suspension
I refer to my 66 as my project with NASCAR suspension.
Chop |
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#5 |
Registered User
Join Date: Aug 2009
Location: Unionville Mo.
Posts: 217
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Re: 60-72 rear suspension
Nascar doesn't run them because they are best but because the rules say they have too.
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#6 | |
Registered User
Join Date: Nov 2009
Location: Cremona AB Canada
Posts: 370
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Re: 60-72 rear suspension
Quote:
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62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) ![]() ![]() ![]() ![]() |
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#7 |
Registered User
Join Date: Aug 2009
Location: Unionville Mo.
Posts: 217
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Re: 60-72 rear suspension
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#8 |
Registered User
Join Date: Nov 2009
Location: Cremona AB Canada
Posts: 370
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Re: 60-72 rear suspension
the pan hard can be adjusted vertically for roll center and what ever. I am not going to argue with you all day cause if we can't take it to a track it's all just noise
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62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) ![]() ![]() ![]() ![]() |
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#9 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,964
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Re: 60-72 rear suspension
I don't have any years as chassis builder. But, knowing how racing sanctions govern the rules..... NASCAR uses truck arms because they're relatively simple & easy to police.
They also do not use truck arms as an 'absolute' for all cup-car racing. Some classes allow the use of 3-links vs. the truck arm set-up.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#10 |
Registered User
Join Date: Nov 2009
Location: Cremona AB Canada
Posts: 370
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Re: 60-72 rear suspension
Not going to argue about it ; it was a fine system when it was built and is still more than adequate
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62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) ![]() ![]() ![]() ![]() |
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#11 | ||
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,964
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Re: 60-72 rear suspension
Quote:
Quote:
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#13 |
Registered User
Join Date: Nov 2009
Location: Cremona AB Canada
Posts: 370
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Re: 60-72 rear suspension
I argree. my point was these trucks were well suspended the trailing arms are simple as you said easy to tune I didn't say they are the best I just know what one of these trucks is capable of with very little tuning and some tires, My point is for 50 year old tech its pretty hard to beat, I wasn't looking for an arguement but I have run them on the track and they work sorry If I offended someone it was never my intention.
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62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) ![]() ![]() ![]() ![]() |
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#14 | |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,964
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Re: 60-72 rear suspension
Quote:
The truck arm suspension is as simple & effective now as it was in its infancy. That being said, I like them just fine & choose them over other options knowing there is better available.
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#15 |
Registered User
Join Date: Nov 2009
Location: Galt, Calif
Posts: 2,437
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Re: 60-72 rear suspension
While we`re debating this issue, I thinking of bagging the rear suspension only but at the rear most end on the trailing arms for ride improvement only over the springs, anybody know the weight capacity of some of the bag kits, my thought is by stretching out the suspension to the rear will make it ride better as opposed the the springs being further up the trailing arms. Anybody have thoughts on this.
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`64 C10 vortec 350/350/373 posi `69 RS/SS 350/350/308 `37 Ford 406/350/324 traclock `68 Dart 370/904/323 suregrip |
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#16 |
Registered User
Join Date: Nov 2009
Location: Cremona AB Canada
Posts: 370
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Re: 60-72 rear suspension
other than the frame is designed to carry the load on the upper perches but i don't think you would soften the ride any being further from the fulcrum .its bed time I can't think .THe 60-62s had the shock behind the axle don't think it changed much when it was relocated. Did we decide anything??
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62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) ![]() ![]() ![]() ![]() Last edited by 62gmc910; 12-05-2009 at 01:22 AM. Reason: saw scoti's post |
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#17 |
Registered User
Join Date: Nov 2009
Location: Galt, Calif
Posts: 2,437
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Re: 60-72 rear suspension
I was just thinking out of the box, and I`m not laying frame, just looking for a way to soften the ride, somewhat, when the box is empty its seams harsh ride and I`m not sure why, original springs so you would think they would be quite a bit softer by now.
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`64 C10 vortec 350/350/373 posi `69 RS/SS 350/350/308 `37 Ford 406/350/324 traclock `68 Dart 370/904/323 suregrip |
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#18 |
Registered User
Join Date: Nov 2009
Location: Cremona AB Canada
Posts: 370
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Re: 60-72 rear suspension
Some of those trucks had 2 stage springs and the soft stage collapsed leaving you only with the firm stage , when you look at the coils are the bottom 2 rounds touching??
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62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) ![]() ![]() ![]() ![]() Last edited by 62gmc910; 12-05-2009 at 01:29 AM. |
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#19 |
Registered User
Join Date: Nov 2009
Location: Galt, Calif
Posts: 2,437
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Re: 60-72 rear suspension
Yes I beleive so, so therein lies my issue, going to replace all the bushings anyways i`ll just order springs as well with a drop kit, (4/6) from ECE.
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`64 C10 vortec 350/350/373 posi `69 RS/SS 350/350/308 `37 Ford 406/350/324 traclock `68 Dart 370/904/323 suregrip |
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#20 |
Registered User
Join Date: Nov 2009
Location: Cremona AB Canada
Posts: 370
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Re: 60-72 rear suspension
now we're havin' fun
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62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) ![]() ![]() ![]() ![]() |
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#21 |
Registered User
![]() Join Date: Aug 2005
Location: Hillsboro Oregon
Posts: 6,449
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Re: 60-72 rear suspension
Moving a spring or bag away from the fulcrum would make the ride stiffer, not softer. What shocks are you running?
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#22 |
Registered User
Join Date: Nov 2009
Location: Galt, Calif
Posts: 2,437
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Re: 60-72 rear suspension
I beleive they are standard monroe shocks with some miles on them, nothing special. they are not worn as of yet, truck settles right down. I would have thought that stretching out the suspended weight would soften the ride...!
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`64 C10 vortec 350/350/373 posi `69 RS/SS 350/350/308 `37 Ford 406/350/324 traclock `68 Dart 370/904/323 suregrip Last edited by Rich 5150 69; 12-05-2009 at 01:45 AM. |
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#23 |
Registered User
![]() Join Date: Aug 2005
Location: Hillsboro Oregon
Posts: 6,449
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Re: 60-72 rear suspension
They may not be worn but they may be too heavy for the application. Shocks make a huge difference in ride quality, especially the rear.
Look at the TA as a lever. The closer to the fulcrum the spring is the more mechanical advantage the truck's weight has over it. So the spring compresses more with a given load. This is the same effect you get with softer springs. The inverse is also true. Last edited by Frizzle Fry; 12-05-2009 at 02:01 AM. |
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#24 |
Registered User
Join Date: Nov 2009
Location: Galt, Calif
Posts: 2,437
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Re: 60-72 rear suspension
That makes sense Mike, maybe I`m just looking at this too hard, going to change springs/ shocks anyways, i`ll see what they have to offer...
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`64 C10 vortec 350/350/373 posi `69 RS/SS 350/350/308 `37 Ford 406/350/324 traclock `68 Dart 370/904/323 suregrip |
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#25 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,964
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Re: 60-72 rear suspension
If you're considering 6" or so drop, swap to bags. You'll spend a little more initially, but will get better ride & can adjust the pressure to carry the original rated capacity as needed.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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