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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: jcastle1]
#1081833
09/24/11 11:50 PM
09/24/11 11:50 PM
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Joined: Dec 2004
Posts: 10,552
Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,552
Rittman Ohio
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Yep split the sleeve,lost all the preload then mayhem was introduced  They all fail eventually  Gus 
64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: jcastle1]
#1081836
09/24/11 11:57 PM
09/24/11 11:57 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Another pic of axle splines
For stock axles the splines arent too bad... my go fast
axles look worse than that... they took a set and have
stayed that way ever since
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: jcastle1]
#1081838
09/25/11 12:04 AM
09/25/11 12:04 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
What do you mean by "split the sleeve"?
I don't understand.
Its a 489 case, right... it uses a crush sleeve on
the pinion... apply enough load and the pinion will
push forwards and crush it more and thats the start
of what you have... heavy cars WILL break a 8 3/4...
I still use a 8 3/4 but my car is light... with a 1.19 60'
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: jcastle1]
#1081839
09/25/11 12:07 AM
09/25/11 12:07 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
For stock axles the splines arent too bad... my go fast
axles look worse than that... they took a set and have
stayed that way ever since
Not afraid of them breaking off when twisted like that?
Anything is possible... but they have been in there
that way for 8 years now
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: jcastle1]
#1081841
09/25/11 12:28 AM
09/25/11 12:28 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Mike,
a friend helped me drill out the 7290 yolk and attached heavier straps and grade 8 bolts/nuts the day before I went to the track.
I removed the yolk for drilling.
I knew I had the 489 with a crush sleeve.
The pig was just freshened with new bearings & pinion seal last fall.
I re-installed the yolk and torqued it to 190 lbs.
I was told by the person who re-built my pig that he torqued it to 225 ft. lbs.
The yolk definately felt different(tighter)after I torqued to 190
I was gonna step it to 225lbs after I reached 190 but stopped because it felt tighter.
The next day after driving it to the track,it broke on the starting line after 1 easy pass to break in the new slicks.
Do you think I probably crushed the sleeve further,and changed the pre-load?
John
If I were to race(or even street drive) the 489 I
would go with the solid sleeve... did you change the
pre-load... most likely... if I need to pull the yoke
I torque it back to spec(or damn close).... JMO on
the preload... but either way... a heavy car and 4 speed
with slicks and have good bite.... something has to give
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: DemonDust]
#1081850
09/25/11 02:32 PM
09/25/11 02:32 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
My engine must be a POS... I never broke my 8 3/4 yet....
I had over 600 passes on a stock 489 till it spit the
caps off, thats when I changed over to the alum center
but again its a light car
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: DemonDust]
#1081852
09/25/11 02:48 PM
09/25/11 02:48 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
What do you gain with the alum center?
I'm running a 742 case with 5.13, billet caps, spool and Cass's race axles. I've recently back braced it since the tubes were starting to twist.
The alum center is based on the 742 but its just
beefier and stronger... it has threw bolts(on 3 of
them) to hold the caps which are big... when I bought
mine they were reasonable on price and I got 35% off,
now days they're pretty pricey
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: MR_P_BODY]
#1081853
09/25/11 02:51 PM
09/25/11 02:51 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Quote:
What do you gain with the alum center?
I'm running a 742 case with 5.13, billet caps, spool and Cass's race axles. I've recently back braced it since the tubes were starting to twist.
The alum center is based on the 742 but its just
beefier and stronger... it has threw bolts(on 3 of
them) to hold the caps which are big... when I bought
mine they were reasonable on price and I got 35% off,
now days they're pretty pricey
Yup, if I remember right. A lot of strength is gained with the through bolts, even though it's aluminum. 
Sorry to hear about rear, jcastle1, don't have any leads for ya for on dana 60 rear ends.
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: jcastle1]
#1081855
09/25/11 04:32 PM
09/25/11 04:32 PM
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Joined: Jan 2003
Posts: 74,976
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,976
U.S.S.A.
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Quote:
Mike,
The pig was just freshened with new bearings & pinion seal last fall.
I re-installed the yolk and torqued it to 190 lbs.
I was told by the person who re-built my pig that he torqued it to 225 ft. lbs.
The yolk definately felt different(tighter)after I torqued to 190
I was gonna step it to 225lbs after I reached 190 but stopped because it felt tighter.
The next day after driving it to the track,it broke on the starting line after 1 easy pass to break in the new slicks.
Do you think I probably crushed the sleeve further,and changed the pre-load?
John
if it felt tighter then yes you over torqued it and that is why it broke ...
But I have to ask why ANYONE still uses a crush sleeve ??? It's an accident waiting to happen, solid spacers have been available for the 489 for close to 20 years ...
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: DemonDust]
#1081856
09/25/11 04:34 PM
09/25/11 04:34 PM
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Joined: Dec 2009
Posts: 20,630
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,630
in a cattle trailer down by th...
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Quote:
Whats the P/N?
http://www.summitracing.com/parts/DCC-4876445/?rtype=10
I've been using one for well over 10 years now and since I went to the pro gear I've not broken anything. Even my 30 spline Moser axles splines are still nice and straight.
Mancini is the cheapest I've found though.
http://chucker54.stores.yahoo.net/moal8ca742ca.html
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: DemonDust]
#1081857
09/25/11 04:34 PM
09/25/11 04:34 PM
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Joined: Jan 2003
Posts: 74,976
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,976
U.S.S.A.
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Quote:
My engine must be a POS... I never broke my 8 3/4 yet....
Have you ran it other than on the ice ?
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: JohnRR]
#1081858
09/25/11 05:01 PM
09/25/11 05:01 PM
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Joined: Feb 2005
Posts: 5,207
Menomonee Falls
DemonDust
master
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master
Joined: Feb 2005
Posts: 5,207
Menomonee Falls
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Quote:
Quote:
My engine must be a POS... I never broke my 8 3/4 yet....
Have you ran it other than on the ice ?
Yeah I ran it on the asphalt, got a 1.36 60 ft... But the belleville unwound and the high clutches had a nuclear meltdown.... Currently under reconstruction 
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: fourgearsavoy]
#1081859
09/25/11 05:16 PM
09/25/11 05:16 PM
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Joined: May 2003
Posts: 2,117
Cleveland Ohio
10secGTX
top fuel
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top fuel
Joined: May 2003
Posts: 2,117
Cleveland Ohio
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Quote:
Yep split the sleeve,lost all the preload then mayhem was introduced
They all fail eventually
Gus
Gus.... You Got a pretty way of sayn things....
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: fourgearsavoy]
#1081862
09/25/11 10:13 PM
09/25/11 10:13 PM
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Joined: May 2003
Posts: 2,414
St. Croix, US Virgin Islands
David_in_St_Croi
top fuel
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top fuel
Joined: May 2003
Posts: 2,414
St. Croix, US Virgin Islands
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Call Cass Eslick aka Dr. Diff out in Montana. He can set you up with a Strange 60. We went the S60 route with a Detroit Tru-Trac. Has worked great. The 8-3/4 brakes bolted right up, which saved some coin.
Tried to find a Dana in a junkyard, but decided the time spent to find one, change gears, put in limited slip of some type, weld on axle ends was better spent doing what I do well, which is designing boats, and paying Cass for brand new parts that showed up in a nice crate.
Oh yeah, on our 8-3/4 the spider gears broke, the left axle shaft twisted off and the right one was twisted like you show. There were also signs of the ring gear hitting the housing. Same deal, stout 383, heavy car (70 RR) 4 speed, slicks. Now that we have a Performance Only 452 I am really good that we have the S60.
The problem was, no matter what axles I put in, the spider gears would be the same. I would have to back brace the housing (welding, distortion, straightening), buy new shafts etc so went right to overkill.
Bummer about the breakage regardless.
I will also mention might want to think about a different clutch too since we are all spending your money with our suggestions. I have been very pleased with our Tim Hyatt built Mcleod based Soft-Lock. Loosen it up for the track, tighten it up for the street.
Last edited by David_in_St_Croi; 09/25/11 10:30 PM.
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: jcastle1]
#1081870
09/28/11 12:12 AM
09/28/11 12:12 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
If I switch from an 8 3/4 to a Dana60,will I be able to use the same driveshaft?Or will I have to have it cut down?
John
no the currant one will not fit
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: jcastle1]
#1081873
09/29/11 12:00 AM
09/29/11 12:00 AM
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Joined: Oct 2006
Posts: 1,264
New York, USA
Chargerfan68
pro stock
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pro stock
Joined: Oct 2006
Posts: 1,264
New York, USA
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Quote:
Is there a difference between a trac-loc and a power-loc?
Is there benefits of 35 spline axles over 30 spline?
Also, I was using a pinion snubber,adjusted 3/4 from floor.I know a lot of you are against them.
What will I do in place of one?I have extra heavy duty leaf springs under the car which I cannnot afford to replace right now.
Powerloc has the clutches in the Sure Grip unit and is rebuildable and arguably will transmit more torque through it before slipping, compared to the Tracloc, which has the cone type sure grip that is not rebuildable (although it can in certain instances be remachined to work again).
The 35 spline axles are stronger due to the increased surface contact of the splines compared to the 30 splines. The 40 splines are stronger than the 35 and so on.
35 splines are very adequate on many very high torque/horsepower applications. Just do regular maintanance check ups on them for twist and if there are any problems peeking around the corner, you can usually catch them before they bite you.
1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: Chargerfan68]
#1081874
09/29/11 01:55 PM
09/29/11 01:55 PM
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Joined: Jan 2003
Posts: 2,734
Charlotte, NC
446acuda
master
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master
Joined: Jan 2003
Posts: 2,734
Charlotte, NC
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Quote:
Quote:
Is there a difference between a trac-loc and a power-loc?
Is there benefits of 35 spline axles over 30 spline?
Also, I was using a pinion snubber,adjusted 3/4 from floor.I know a lot of you are against them.
What will I do in place of one?I have extra heavy duty leaf springs under the car which I cannnot afford to replace right now.
Powerloc has the clutches in the Sure Grip unit and is rebuildable and arguably will transmit more torque through it before slipping, compared to the Tracloc, which has the cone type sure grip that is not rebuildable (although it can in certain instances be remachined to work again).
The 35 spline axles are stronger due to the increased surface contact of the splines compared to the 30 splines. The 40 splines are stronger than the 35 and so on.
35 splines are very adequate on many very high torque/horsepower applications. Just do regular maintanance check ups on them for twist and if there are any problems peeking around the corner, you can usually catch them before they bite you.
Actually the trac lok has clutches and is rebuildable but is a one piece case with 2 spider gears compared to the Power lok that is a 2 piece case with 4 spider gears.
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: jcastle1]
#1081875
09/29/11 10:29 PM
09/29/11 10:29 PM
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Joined: Nov 2009
Posts: 2,275
Desert Tracker
HYPER8oSoNic
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,275
Desert Tracker
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Quote:
Is there benefits of 35 spline axles over 30 spline?
Also, I was using a pinion snubber,adjusted 3/4 from floor.I know a lot of you are against them.
What will I do in place of one?I have extra heavy duty leaf springs under the car which I cannnot afford to replace right now.
You running a dual-purpose car or is it strictly
for the track? Track only, lose 200-300 lbs (3600lbs total weight) and get the Dana 60 assembly. Dual purpose, just stick to Dana 60 .. period. The 35 spline axles will handle the abuse given. When opportunity arises - switch to the Superstock springs and long shocks, regardless of street or strip. Car weight will dictate which spring application you need.
Or you can run Caltracs, your choice. The extra HD springs are O-K for now, just need to put spring clamps on the front half of the leaves. The pinion snubber, at that height, was doing it's job, but do you have a reinforcement plate above it? If not, put one in. And think about also putting in subframe connectors. Stiffens the frame
and adds some life to the chassis, especially with a 4-speed!! Food for thought!! 
"Stupidity is Ignorance on Steroids"
"Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: jcastle1]
#1081876
09/29/11 11:06 PM
09/29/11 11:06 PM
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Joined: Oct 2003
Posts: 11,684
W. Kentucky
justinp61
I Live Here
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I Live Here
Joined: Oct 2003
Posts: 11,684
W. Kentucky
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Quote:
Also, I was using a pinion snubber,adjusted 3/4 from floor.I know a lot of you are against them.
What will I do in place of one?I have extra heavy duty leaf springs under the car which I cannnot afford to replace right now.
If you get a Strange S-60 it will have tne mounts for a snubber.
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: justinp61]
#1081877
10/02/11 11:09 PM
10/02/11 11:09 PM
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Joined: Apr 2003
Posts: 959
Cincinnati,Ohio
jcastle1
OP
super stock
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OP
super stock
Joined: Apr 2003
Posts: 959
Cincinnati,Ohio
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Okay,decided to upgrade to a Dana 60,shorten driveshaft,and go with the 1350 joint/yoke.
Dr. Diff is in Montana,and I was given a number to a guy in Dayton,Ohio about an hour from me call GRGS (Greg's rear-ends).He uses new housings that he gets somewhere in Michigan.(truck,I guess?)
Anyways,he uses Yukon 35 spline axles,4:10 ring/pinion,and choice of sure-grip.No pinion snubber mount is there.
I don't want to be a traitor(this site uses Dr. Diff)but I can save a couple hundred $$ on shipping(since I can drive there)and he says he buys the parts from Cass.The complete unit is about $800 cheaper as well.
I'm not sure who to use,I don't know anything about this guy other than Kammer & Kammer in Dayton reccomend him.
I also have no idea who Yukon is.
I don't want to cut corners here,although I am on a budget.
Please give me some insight here.
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: justinp61]
#1081879
10/03/11 08:18 PM
10/03/11 08:18 PM
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Joined: Jan 2003
Posts: 74,976
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,976
U.S.S.A.
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Quote:
Quote:
Also, I was using a pinion snubber,adjusted 3/4 from floor.I know a lot of you are against them.
What will I do in place of one?I have extra heavy duty leaf springs under the car which I cannnot afford to replace right now.
If you get a Strange S-60 it will have tne mounts for a snubber.
Yes it will plus it's easier to set up because of the adjusters for carrier preload.
Quote:
Anyone have any thoughts?
Do what you gotta do , if Kammer is recommending the guy then you can't really go wrong there. Do you need the snubber on the rear ?
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Re: Healthy 383+4-speed+slicks=junk 8 3/4
[Re: jcastle1]
#1081891
11/05/11 10:52 AM
11/05/11 10:52 AM
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Joined: May 2003
Posts: 2,414
St. Croix, US Virgin Islands
David_in_St_Croi
top fuel
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top fuel
Joined: May 2003
Posts: 2,414
St. Croix, US Virgin Islands
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Quote:
Anybody else use a true-trak diff?
Just looking for some insight as to what it feels like street or track,compared to a cone-style sure grip on an 8 3/4.
pacing,
John
With our S-60 I noticed it works great, much smoother. Our 8-3/4 had a clutch style Sure-Grip and on tight slow speed corners you could feel the inner tire chirping. With the True-Trak there is none of that. There are some really tight uphill turns here where you drop down to 1st or 2nd where the difference is very noticeable. Driving up our dirt road no problems with traction.
At the track with slicks it grips great.
Very pleased with it and Cass gives great support before and after the sale.
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If you go this route, be sure to let it dry undisturbed for a good 24-36 hours. It takes this stuff a while to dry.
