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Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: GY3] #2788673
06/23/20 11:04 PM
06/23/20 11:04 PM
Joined: Jan 2003
Posts: 4,296
Chicago, IL
TonyS451 Offline
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Chicago, IL
Originally Posted by GY3
Funny, this thread is 4 years old!

What I ended up doing was going to a Dana 60 with a Dr. Diff spool and axles. I couldn't be happier!

This car sees a lot of street miles and gets to the track probably 5-6 times during the Summer. Only issues are with tight parking spaces but I can live with that.

I'm now spraying a 200 shot on top of what I was doing and everything works great!

The only thing I will recommend is throwing the wheel studs that come with the Dr. Diff axles in the trash and replacing with something like Strange. They were bending.


I have the same set up from Dr Diff in my Savoy . How are your wheel studs bending?


2 kids and a dog
Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: TonyS451] #2788729
06/24/20 08:14 AM
06/24/20 08:14 AM
Joined: Jan 2003
Posts: 13,319
Marion, South Carolina [><]
an8sec70cuda Offline
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Marion, South Carolina [><]
The ONLY time I've not wanted a spool is when trying to push the car w/ the front wheels turned.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: an8sec70cuda] #2788743
06/24/20 09:35 AM
06/24/20 09:35 AM
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Posts: 900
Washington
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hemienvy Offline
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Washington
Spool Guys:

Just wondering if you have wide tires or "normal" width, I'm wondering how the rear tire width
with a spool affects drivability. I'm looking at doing one car with 18.50 tires.

Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: hemienvy] #2788755
06/24/20 10:29 AM
06/24/20 10:29 AM
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Posts: 964
Odessa, Fl
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blowndart Offline
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Odessa, Fl
I ran a spool with 18.5 tires on the street for awhile. It wasn't bad. I switched to a locker, but a spool will work.

Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: blowndart] #2788756
06/24/20 10:33 AM
06/24/20 10:33 AM
Joined: Feb 2014
Posts: 1,695
central il.
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second 70 Offline
top fuel
second 70  Offline
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Joined: Feb 2014
Posts: 1,695
central il.
Love my s trac

IMG_0906-1.jpg
Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: TonyS451] #2788795
06/24/20 12:16 PM
06/24/20 12:16 PM
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Wichita
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GY3 Offline OP
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Wichita
Originally Posted by TonyS451
Originally Posted by GY3
Funny, this thread is 4 years old!

What I ended up doing was going to a Dana 60 with a Dr. Diff spool and axles. I couldn't be happier!

This car sees a lot of street miles and gets to the track probably 5-6 times during the Summer. Only issues are with tight parking spaces but I can live with that.

I'm now spraying a 200 shot on top of what I was doing and everything works great!

The only thing I will recommend is throwing the wheel studs that come with the Dr. Diff axles in the trash and replacing with something like Strange. They were bending.


I have the same set up from Dr Diff in my Savoy . How are your wheel studs bending?


Big torque and crap quality studs that weren't Grade 8 like they were marked.


'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.

Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: an8sec70cuda] #2788796
06/24/20 12:18 PM
06/24/20 12:18 PM
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Wichita
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GY3 Offline OP
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Originally Posted by an8sec70cuda
The ONLY time I've not wanted a spool is when trying to push the car w/ the front wheels turned.


No doubt! A couple of degrees of steering angle and you're screwed! One of the tracks we go to has a 90* right turn in the staging lanes and then another to get to the burnout box. It gets fired up to move it. runaway


'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.

Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: GY3] #2788818
06/24/20 01:34 PM
06/24/20 01:34 PM
Joined: Jan 2003
Posts: 16,917
NC
440Jim Offline
I Live Here
440Jim  Offline
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NC
What is the practical experience with the warning from the Strange S-trac manual:
Quote
Warning: In extreme situations damage to the unit can occur when one tire spins excessively fast
compared to the other tire. An example of this would be when leaving the water box during a burnout.
Typically one tire will dry up faster than the other creating an unequal traction situation which can cause
an excessive difference in tire speeds. Care should be taken to avoid this situation.

Strange_S-trac.JPG

1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1
Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: 440Jim] #2788822
06/24/20 01:47 PM
06/24/20 01:47 PM
Joined: Nov 2007
Posts: 21,808
Kirkland, Washington
Pacnorthcuda Offline
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From a traction perspective that’s exactly what we want a differential traction device to prevent!!!

Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: GY3] #2788824
06/24/20 01:52 PM
06/24/20 01:52 PM
Joined: Mar 2003
Posts: 1,417
Martinsville, IN
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cdwmotorsports Offline
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Martinsville, IN
Originally Posted by GY3
I have a new Auburn unit in the car (complete 3rd member from Manciniracing) that's already starting to make noises going around corners. Less than 2k miles. down

It's in an 8 3/4 with 3.55 gears and I'm pushing 600 horsepower with ET Street Pro's.

I'm not a fan of the Detroit locker because of the noises it makes in a friend's 9 inch.

I've thought about a spool but not excited about corners on the street with one.

Is the truetrac okay for this level of horsepower and sticky tires?

I've started gathering Dana 60 parts and may just upgrade the whole rear. hammer weld




In my 8.75 I just swapped from a 2.76 single track to a 3.23 suregrip. It was/is only there until I get around to pulling it and swapping in my freshly built 3.91 spool rear. I run an B engined Demon it mostly sees and will continue to see street duty with some racing here and there. I'm hoping at least a stage or two of Drag Week is in that mix this year.

When I build my 512 I may swap to a 60 based rear.

Last edited by cdwmotorsports; 06/24/20 01:52 PM.

eBay-cdwmotorsports
Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: cdwmotorsports] #2789044
06/25/20 12:02 AM
06/25/20 12:02 AM
Joined: Oct 2004
Posts: 16,452
Canada
CrAzYMoPaRGuY Offline
I Live Here
CrAzYMoPaRGuY  Offline
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Posts: 16,452
Canada
Should I assume the Eaton TrueTrac is still hit and miss and to be avoided?
Powerlocker- anybody have good/bad stuff I should know? lol There has been a powerlocker in the car for years and years, I've never had trouble with it....
I know....
Yet lol


CrAzYMoPaRGuY
Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: an8sec70cuda] #2789782
06/27/20 09:25 AM
06/27/20 09:25 AM
Joined: Jan 2003
Posts: 27,421
Balt. Md
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383man Offline
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Originally Posted by an8sec70cuda
The ONLY time I've not wanted a spool is when trying to push the car w/ the front wheels turned.



I ran a spool years ago in my bracket car and loved it for a race car. The one thing I don't like about them is if you have to have the car pushed as then it feels like you put the brakes on when turning. That's why I went with the Detroit Locker for my street car. And its been working fine for about 9 years. Ron

Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: 383man] #2789824
06/27/20 11:25 AM
06/27/20 11:25 AM
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Posts: 30,947
Oregon
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AndyF Offline
I Win
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Oregon
I have a Detroit Locker in the Duster but I'm going to swap it for an S Trac. The Locker is noisy and sometimes it does something weird when I'm not expecting it. Nothing super serious, just a wiggle when I get out of the throttle or something like that. Can be a little spooky if you're coming around a corner or going fast.

Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: AndyF] #2789853
06/27/20 12:57 PM
06/27/20 12:57 PM
Joined: Jan 2003
Posts: 27,421
Balt. Md
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383man Offline
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Balt. Md
Originally Posted by AndyF
I have a Detroit Locker in the Duster but I'm going to swap it for an S Trac. The Locker is noisy and sometimes it does something weird when I'm not expecting it. Nothing super serious, just a wiggle when I get out of the throttle or something like that. Can be a little spooky if you're coming around a corner or going fast.



Andy how does the S Trac work ? Is it a posi type of unit ? Thanks , Ron

Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: 383man] #2790202
06/28/20 07:31 AM
06/28/20 07:31 AM
Joined: Jan 2003
Posts: 2,902
A shed in England
Tig Offline
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A shed in England
We have a Detroit locker in our Dana 60 in a 3900lb (W/D) E body. It works really well, no noises, no shimmy when on and off the throttle. I phoned round looking for something to take 950ft/lb and 1000hp + and no-one would recommend anything but a spool shocked we have little room to turn round where we live so a spool was a no tsk Couldn't be happier really, car goes straight and will carry the wheels 100ft+ on most passes up


'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: Tig] #2790254
06/28/20 11:54 AM
06/28/20 11:54 AM
Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
hemi-itis Offline
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hemi-itis  Offline
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Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
Spool in my car was in there when I bought it 30 years ago. Street driven over 1500 miles a season and an average of 50 passes per season.As of now the car has been 9.3 @ 147 ,,,,,,,,,3700 lbs.

OH,,,,,,,and BLACK LINES MATTER for those with Carownersvirus whistling

IMG_9960.JPG-51.jpg

HEMI-ITIS has no cure.
My condition is fully BLOWN!!
Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: hemi-itis] #2790305
06/28/20 01:21 PM
06/28/20 01:21 PM
Joined: Sep 2003
Posts: 19,239
north of coder
moparx Offline
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Joined: Sep 2003
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north of coder
nice lines -itis ! up up

i did that one time, and my buddy gathered up all the smoking dust particles and rolled them into a bigger than golf ball size ball of rubber. i still have that thing somewhere........
beer

Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: moparx] #2790321
06/28/20 02:06 PM
06/28/20 02:06 PM
Joined: Jan 2012
Posts: 1,541
USA
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hudsonhornet7x Offline
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USA
This thread has been enlightening. I have always read to stay away from a spool if the car is street driven. I am seeing now that may not be the case. How about in a light rain, does a spool make the car step out in a turn?

Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: hudsonhornet7x] #2790328
06/28/20 02:14 PM
06/28/20 02:14 PM
Joined: Nov 2007
Posts: 21,808
Kirkland, Washington
Pacnorthcuda Offline
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Originally Posted by Warhawk
This thread has been enlightening. I have always read to stay away from a spool if the car is street driven. I am seeing now that may not be the case. How about in a light rain, does a spool make the car step out in a turn?


Hell yes. Requires pretty careful application of the throttle in any turn on a slick surface! Roundabouts get really interesting.

Re: Spool, truetrac, clutch sure grip or other for street/strip? [Re: hudsonhornet7x] #2790376
06/28/20 03:59 PM
06/28/20 03:59 PM
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Wichita
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GY3 Offline OP
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Originally Posted by Warhawk
This thread has been enlightening. I have always read to stay away from a spool if the car is street driven. I am seeing now that may not be the case. How about in a light rain, does a spool make the car step out in a turn?


I do my best NOT to get caught in the rain. My tires have no tread! I have a couple of times when it sprinkled and just had to drive slowly and carefully.


'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.

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