spool vs posi unit

jax702 · 05-11-2002, 10:59 PM

What is the difference between these 2 and which one would be better for a street driven application?

Tim Lester · 05-12-2002, 02:32 AM

The difference between the two the spool has no clutches no spider gears it's solid, so it wil not slip going around corners were the the limit-slip has the clutches & the spider gears to alou slipping when turning.Think of it this way when you turn say to the right the left rear tire has to travel futher then the right rear tire with a spool they are turning at the same speed.Sorry so long good luck Tim.

98SNAKE · 05-12-2002, 10:49 AM

If this is a drag car the spool would be the best choice, as there are no parts that will wear. And they can handle launching with slicks extremly well. But for a street car posi all the way, as long as you get the rear end set up the right way it should last a long time.

Will

1BadCobra · 05-12-2002, 11:40 AM

A spool is not for the street. It really only for drag racing. If you want to upgrade, try a FMS differential. They work well and don't make a bunch of noise (like an Auburn locker). MM & FF had a great artical about 3 or 4 months ago expaining every different type of differential. You may want to see if you can find it on there web site.

SLOW 97 · 05-14-2002, 08:48 AM

You CANNOT use a spool on the street or any application that involves turning of any kind. The stock Traction-Lok rearend is good until you break the S-clip for the Posi mechanism. One of the best all around rearends I think is the Eaton Posi. It uses stronger coil springs instead of the S shaped spring in the Ford T/L.

05-11-2002, 10:59 PM	#1
jax702 Registered Member Join Date: May 2002 Location: vegas Posts: 43	spool vs posi unit What is the difference between these 2 and which one would be better for a street driven application?

05-12-2002, 02:32 AM	#2
Tim Lester Registered Member Join Date: May 2002 Location: IL Posts: 32	The difference between the two the spool has no clutches no spider gears it's solid, so it wil not slip going around corners were the the limit-slip has the clutches & the spider gears to alou slipping when turning.Think of it this way when you turn say to the right the left rear tire has to travel futher then the right rear tire with a spool they are turning at the same speed.Sorry so long good luck Tim. __________________ 1999 Mustang Cobra Solid Axle w/ 4.56's Magnaflow Cat-Back Dr.Gas O/R X-Pipe JBA 1-5/8ths Shorty Headers Homemade Powerpipe March Pulleys JMS Chip Steeda Tri-Ax Shifter Best E.T. w/ parts listed & BFG 275/40/17 D/Rs (10-26-'02; not including JMS Chip)- 12.95 @106.82, 1.79 60FT. Best MPH- 107.43 New Best MPH (4-26-03)- 109.45 316 RWHP/ 309 RWTQ

05-12-2002, 10:49 AM	#3
98SNAKE Registered Member Join Date: Apr 2001 Location: Sterling Heights,Michigan Posts: 129	If this is a drag car the spool would be the best choice, as there are no parts that will wear. And they can handle launching with slicks extremly well. But for a street car posi all the way, as long as you get the rear end set up the right way it should last a long time. Will __________________ SOLD!!! 98Cobra Black on Black Coupe 4.30's DTS diff cover Eaton posi Moser 31 spline axles Spec Stage 2 clutch B&M Ripper shifter BBK off-road x-pipe Steeda pullies Steeda timing adj@14deg MAC cold air Best Time 12.9 @107.5 on street tires New Car 03 Cobra Not Stock

05-12-2002, 11:40 AM	#4
1BadCobra Registered Member Join Date: Apr 2002 Location: Alabama Posts: 10	A spool is not for the street. It really only for drag racing. If you want to upgrade, try a FMS differential. They work well and don't make a bunch of noise (like an Auburn locker). MM & FF had a great artical about 3 or 4 months ago expaining every different type of differential. You may want to see if you can find it on there web site. __________________ Black 97 Cobra - SHM Short Block, Stage 1 ported heads, Tremec 5 speed, 4.10 gears, Alum. Drive Shaft, McLeod Clutch, Pro 5.0 Shifter, Pro-M Mass Air, 36 lbs/hr injectors, MSD Dis4, BBK long tube headers w/ Off Road H-Pipe, Flow Master 2.5" mufflers and pipes and NX 150 wet shot. Teal 93 Cobra - Tremec, ME Axles, Control Arms, 77mm Pro-M.

05-14-2002, 08:48 AM	#5
SLOW 97 Registered Member Join Date: Feb 2002 Location: Arlington Heights,IL Posts: 231	You CANNOT use a spool on the street or any application that involves turning of any kind. The stock Traction-Lok rearend is good until you break the S-clip for the Posi mechanism. One of the best all around rearends I think is the Eaton Posi. It uses stronger coil springs instead of the S shaped spring in the Ford T/L. __________________ '97 Laser Red GT Coupe Stock 2V (Pulled Silencer) 4R70W Automatic Ripped off a BLISTERING 15.37@90MPH With a 2.21 60ft Just Installed- K&N Air Filter Coming Soon...... -4.10's -Flowmaster A/T or Magnapack Cat-Back

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