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#1049217 - 03/25/17 01:51 PM drive shaft?  
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88ss408 Offline
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miramichi, NB
Hey guys wondering what yall running for drive shafts?


1988 monte carlo ss 408 sbc
-----------------------------------------------------
1984 monte carlo cs 400 sbc
#1049218 - 03/25/17 02:47 PM Re: drive shaft? [Re: 88ss408]  
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GuysMonteSS Offline
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Kentville,Nova Scotia
I've got a Alyn Armstrong custom built shaft.
Guy


GuysMonteSS '86 SS,513 BBC,AFR Heads,UDHarold/Bullet Custom Solid Roller Cam,706 lift,255/263 @ .050,Jesel Shaft Rockers,Balanced & Blueprinted,Doug Nash 4+1 5 Speed,Hurst In-Line Shifter,Ford 9 Inch Rear,SC&C Street Comp Stage 2+ Front End Kit...
#1049219 - 03/25/17 03:19 PM Re: drive shaft? [Re: 88ss408]  
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upflying Offline
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Reno, NV
Shortened stock


86 MCSS Notchback coupe, LS3, 4L65E, QP 9", Eaton Truetrac, 4 wheel disc, column shift, Dakota Digital, silver with maroon bench interior

#1049223 - 03/25/17 10:08 PM Re: drive shaft? [Re: 88ss408]  
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88ss408 Offline
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miramichi, NB
Where did you get that at guy?


1988 monte carlo ss 408 sbc
-----------------------------------------------------
1984 monte carlo cs 400 sbc
#1049224 - 03/25/17 10:28 PM Re: drive shaft? [Re: 88ss408]  
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GuysMonteSS Offline
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Kentville,Nova Scotia
Originally Posted by 88ss408
Where did you get that at guy?



I got it at A&J Armstrongs in Kingston NS
Guy


GuysMonteSS '86 SS,513 BBC,AFR Heads,UDHarold/Bullet Custom Solid Roller Cam,706 lift,255/263 @ .050,Jesel Shaft Rockers,Balanced & Blueprinted,Doug Nash 4+1 5 Speed,Hurst In-Line Shifter,Ford 9 Inch Rear,SC&C Street Comp Stage 2+ Front End Kit...
#1049231 - 03/26/17 12:31 AM Re: drive shaft? [Re: 88ss408]  
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Onebadbowtie86 Offline
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Traverse City Michigan
PST 3.5" aluminum with chromoly yokes and spicer 1350 u joints.


'86 Monte carlo ss-Frame off resto-mod.
Ls2/t56/8.5"
#1049232 - 03/26/17 12:45 AM Re: drive shaft? [Re: 88ss408]  
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Onebadbowtie86 Offline
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Traverse City Michigan
I had a 3" steel shaft before this one that was fine also. I wouldn't try putting a lot of power through the stock shaft.


'86 Monte carlo ss-Frame off resto-mod.
Ls2/t56/8.5"
#1049233 - 03/26/17 01:01 AM Re: drive shaft? [Re: 88ss408]  
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Jameson Offline
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Jameson  Offline
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Elizabeth City, NC
3.5in steel from Dennys


1988 Monte Carlo SS Eaton 112 5.3/T56 swap, Way to many mods to list.
2015 GMC Sierra Denali



#1049235 - 03/26/17 01:38 AM Re: drive shaft? [Re: 88ss408]  
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mmc427ss Offline
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Pottstown, Pa
Denny's 3.5" alum HD, 1350 joints, over 10 years of abuse.
Bob

#1049245 - 03/26/17 08:17 PM Re: drive shaft? [Re: 88ss408]  
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AkronAero Offline
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Akron OH
Following up on recommendations/posts by SSLance and others several years ago, most of the upgrades since on this site from the OE 2.5" steel shafts have been to 3.5".
Easy fit.
1350 joints are standard on our cars (considered upgrades on other platforms).
A reputable fabricator is desired, preferably one who will balance at higher RPMs.
Dennys is excellent as others mentioned.
Aluminum or steel as you prefer; not a big difference in price IMO.
I have 3.5" steel now (500HP) but will go to Aluminum once I blow out my rear end and have to upgrade that too... hahaha
Thanks again Lance for the tip - got rid of a horrible vibration for me.....
Gordon

#1049246 - 03/26/17 09:10 PM Re: drive shaft? [Re: 88ss408]  
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Joe87monteSS Offline
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Memphis,TN
I had first bought an aluminum shaft with 1350 joints, and never installed it. I found a steal of a deal on a carbon fiber shaft with 1350 joints. Along with that, I'm using a Moser bolt on slip yoke for the transmission.

Ignore the rust on the rear end. It is once again pulled so it can be narrowed.

[Linked Image]
[Linked Image]


Joey
Engine/head builder/machinist
1987 Monte Carlo SS 383/4 Speed
2004 Silverado
Facebook

#1049249 - 03/27/17 12:56 AM Re: drive shaft? [Re: AkronAero]  
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Jameson Offline
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Elizabeth City, NC
Originally Posted by AkronAero

1350 joints are standard on our cars (considered upgrades on other platforms).


Stock gbody is 1310, not 1350 fyi...


1988 Monte Carlo SS Eaton 112 5.3/T56 swap, Way to many mods to list.
2015 GMC Sierra Denali



#1049252 - 03/27/17 01:35 AM Re: drive shaft? [Re: 88ss408]  
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Onebadbowtie86 Offline
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Traverse City Michigan
Stock our cars us 3r u joints, definitely NOT 1350.


'86 Monte carlo ss-Frame off resto-mod.
Ls2/t56/8.5"
#1049253 - 03/27/17 01:51 AM Re: drive shaft? [Re: 88ss408]  
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AkronAero Offline
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Akron OH
Thanks Jameson. That's consistent. I stand corrected....

#1049284 - 03/27/17 08:35 PM Re: drive shaft? [Re: 88ss408]  
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88ss408 Offline
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miramichi, NB
Do I need to change the differential mounting flange if I go with 1350 u joints instead of the 1310?


1988 monte carlo ss 408 sbc
-----------------------------------------------------
1984 monte carlo cs 400 sbc
#1049287 - 03/27/17 11:13 PM Re: drive shaft? [Re: 88ss408]  
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Onebadbowtie86 Offline
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Traverse City Michigan
You can either change the pinion yoke or use a conversion u joint. IMO factory 3r u joints would be fine to run in most cases, especially if you are running the factory 7.5" rear end. I want to say 3r spicer solid u joints are rated for 600 hp.


'86 Monte carlo ss-Frame off resto-mod.
Ls2/t56/8.5"
#1049308 - 03/28/17 05:25 PM Re: drive shaft? [Re: 88ss408]  
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Joe87monteSS Offline
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Memphis,TN
I think I have a new conversion U joint if you need it.


Joey
Engine/head builder/machinist
1987 Monte Carlo SS 383/4 Speed
2004 Silverado
Facebook

#1049363 - 03/29/17 11:23 PM Re: drive shaft? [Re: 88ss408]  
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88ss408 Offline
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miramichi, NB
Hey guys I was looking on Dennys drives haft site for parts. And found weld on 3.5 yokes neapco n3r-28-427 how strong are they? Also looking at the n3r-3-6081x slip yoke?

Sorry I can't link I don't know how with my tablet.


1988 monte carlo ss 408 sbc
-----------------------------------------------------
1984 monte carlo cs 400 sbc
#1049364 - 03/30/17 12:14 AM Re: drive shaft? [Re: 88ss408]  
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Onebadbowtie86 Offline
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Traverse City Michigan
Are you building the shaft your self?


'86 Monte carlo ss-Frame off resto-mod.
Ls2/t56/8.5"
#1049365 - 03/30/17 12:19 AM Re: drive shaft? [Re: 88ss408]  
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Onebadbowtie86 Offline
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Traverse City Michigan
This company is popular on ls1tech and who I went with.

http://www.pstds.com/

They build awesome drive shafts, they are fast and a better deal then the local truck/driveshaft place local to me. They can install a conversion u joint on the back of the shaft to use your stock pinion yoke also.

[Linked Image]

Last edited by Onebadbowtie86; 03/30/17 12:20 AM.

'86 Monte carlo ss-Frame off resto-mod.
Ls2/t56/8.5"
#1049367 - 03/30/17 01:38 AM Re: drive shaft? [Re: 88ss408]  
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mmc427ss Offline
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Pottstown, Pa
You quickly become aware of the cost of putting together a good shaft. The trick is to only do it once. Every time you change either the trans, rear, or engine the length of the driveshaft may change, Some shafts can be shortened, like steel, but carbon and alum are a different story. So if you intend to use a 7 1/2" rear for a long time spend the money.

I went from a Chevy alum stick belhousing to a Lakewood scattershield. The 1/8" thick blocksaver plate removed 1/8" endplay from the shaft. I'm still good but wouldn't move the rear 1/8" forward. Things to consider. Just like a 2x4, measure twice, cut once.
By the way the stock shaft is not something to spend money on if you have more power and better traction.
Oh, got a loop on the shaft yet?
Bob

#1049368 - 03/30/17 01:45 AM Re: drive shaft? [Re: 88ss408]  
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Onebadbowtie86 Offline
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Thats one thing I still need, a driveshaft loop.


'86 Monte carlo ss-Frame off resto-mod.
Ls2/t56/8.5"
#1049375 - 03/30/17 05:19 AM Re: drive shaft? [Re: 88ss408]  
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mmc427ss Offline
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I've seen the carnage once first hand, one came out from under a Monte on one of those dynos on a trailor, Jonathan, Monte ExpeSS, pretzeled one on a chassis dyno when he installed the LS. Seen a few at the track, good thing the cars are only a few feet out from the lights.

A T56 moves the usually loop location for a stock SS several inches rearward, requires an offset loop. If you build a loop make sure it's NHRA spec, all material 1/4x2, 6" or less from the u-joint You can use the stock tunnel brace holes, but if the carpets are removed, backing up the bolt hole location would be good. An exhaust H pipe behind the trans make the install a little more interesting. I found a piece of 5" OD 1/4" wall tubing, had it cut to 2". Put the car at ride height, used 1/2" wood dowel to hold the 4 1/2" ID tube centered on the 3 /2" shaft and built from there. Jason, want a pic. Would have been much easier on a lift.

Back to shafts. How much freeplay is important, the rear suspension is an unequal length 4 link, the rear move closer to the trans both in compression and droop. Measurements taken years ago were 1/8" closer at full compression, 5/16" at full droop. The 5/16" is significant because 3/4" I believe is considered the norm for freeplay, leaves 7/16" to play with. Later if you change LCAs to something shorter than stock the rear moves closer again. Spohn adj LCA replaced the Global West arms I ran for years, out of the box 3/16" shorter, both were shorter than stock LCAs. Lengthened the Spohn to the Global length to maintain freeplay. 1/8" for a blocksaver plate, 5/16" at full droop, 3/16" for LCA,, many things can affect freeplay, 3/4" at ride height become a critical measurement.
Bob

#1049377 - 03/30/17 05:38 AM Re: drive shaft? [Re: 88ss408]  
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mmc427ss Offline
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Me bad, the steel tube for the loop was 5 1/2" OD, 5" ID, used four 3/4" wood dowels to center the tube on the shaft. Who said 66 is the new 50?
Bob

#1049379 - 03/30/17 05:43 AM Re: drive shaft? [Re: mmc427ss]  
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Onebadbowtie86 Offline
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Originally Posted by mmc427ss
Me bad, the steel tube for the loop was 5 1/2" OD, 5" ID, used four 3/4" wood dowels to center the tube on the shaft. Who said 66 is the new 50?
Bob


lol! I need to build one/ buy one. I haven't bought one because I haven't found any for sale that are offset for the t56. I could build one easy enough I'm sure I just haven't got around to it. There's no tech inspection at the track I go to at least for the test n tune.


'86 Monte carlo ss-Frame off resto-mod.
Ls2/t56/8.5"
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