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Author Topic:   tranny
bill haab
Gearhead

Posts: 143
From: south bend in.
Registered: Oct 2002

posted 10-05-2003 09:47 AM     Click Here to See the Profile for bill haab   Click Here to Email bill haab     Edit/Delete Message   Reply w/Quote
ok guys i have a 66 fastback. With 289 all rebuilt with a paxton supercharger. all new skins on the whole car roll cage 6 point.smiths radiator moser rear end 457 gears. im putting this car together this winter. Ok here is the ? I think I want a 6 speed tranny. I will be running on the street & going to strip once a month. what tranny should I buy. Plus I'm want to buy new.

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bill haab
Gearhead

Posts: 143
From: south bend in.
Registered: Oct 2002

posted 10-06-2003 10:35 PM     Click Here to See the Profile for bill haab   Click Here to Email bill haab     Edit/Delete Message   Reply w/Quote
A little advice would be helpful. thanks

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steve'66
Gearhead

Posts: 6602
From: Sonoma,CA,USA
Registered: Mar 2000

posted 10-06-2003 11:39 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
Bill,

I think the 6 speed or even a 5 speed has too low a 1st gear w/4.56 gearing.

Maybe a 5 speed with 4.10 rear would be ok, but even then the launch ratio is too low. You'll be shifting to second in less than a second.

The 5 or 6 speed would be good with a 3.89/3.90 rear and then you'll only need the 6 speed if you want to try for the 180mph mark.

SteveW

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Tea'sGrabber
Gearhead

Posts: 189
From: Seattle, Wash.
Registered: Feb 2003

posted 10-07-2003 01:35 PM     Click Here to See the Profile for Tea'sGrabber   Click Here to Email Tea'sGrabber     Edit/Delete Message   Reply w/Quote
ditto....66!!

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Todd 71 Mav Grabber All orig 306 cu.in. Cast Iron heads. Carillo Rods.Best et. 10.71 @ 124 thru the mufflers.
http://mustangsandmore.50megs.com/MembersPics/TeasGrabber.html

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bill haab
Gearhead

Posts: 143
From: south bend in.
Registered: Oct 2002

posted 10-07-2003 06:00 PM     Click Here to See the Profile for bill haab   Click Here to Email bill haab     Edit/Delete Message   Reply w/Quote
moser told me they did not have a 456 gearing. only 457. this was before the plane story happened.

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CHIPSBAD67
Journeyman

Posts: 71
From: LOU,KY;USA
Registered: Sep 2003

posted 10-07-2003 07:59 PM     Click Here to See the Profile for CHIPSBAD67   Click Here to Email CHIPSBAD67     Edit/Delete Message   Reply w/Quote
to much rear gear hurts worse than not enough. with the blower i dont think torque will be a problem. id go tkoII and 3:80's.

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306, 4speed, 4.11's....best 1/8 mile 7.58 at 92mph with 1.72 60ft. PUMP GAS/NO ADDERS/STREET TIRES

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kid vishus
Gearhead

Posts: 4736
From: middle of NC
Registered: Oct 2000

posted 10-08-2003 08:18 AM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
I agree, too much total low gear ratio. A buddy of mine was running a 4.71 gear in his mustang, and using a Jerico 4 speed with a 3.08 first gear. It was too low, he was shifting into second before he got to the tree. He had to go to a 4.11 gear to kill some total low gear ratio. A 5 speed with your current rear gear ratio would be like trying to hi speed take off in a truck with a granny low 4 speed.

I suppose you could get a 5 speed with a custom gear ratios in it to compensate for the low rear gear.

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mvierow
Gearhead

Posts: 199
From: Bay Area, Ca
Registered: Apr 2001

posted 10-08-2003 02:47 PM     Click Here to See the Profile for mvierow   Click Here to Email mvierow     Edit/Delete Message   Reply w/Quote
Bill, I'd give Dark Horse performance a call. They can build you up a custom geared 5 speed that will be able to handle the torque your putting down. The size of the 6 speed makes installation a pain, and will require you to cut/modify the tunnel inorder to fit it all under there.

http://www.darkhorseperformance.com
http://www.darkhorseperformance.com/acatalog/3550_TKO_Crossmembers_and_Parts.html

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bill haab
Gearhead

Posts: 143
From: south bend in.
Registered: Oct 2002

posted 10-08-2003 07:15 PM     Click Here to See the Profile for bill haab   Click Here to Email bill haab     Edit/Delete Message   Reply w/Quote
thank's guy's i'm talking to dark horse today !

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Mark T 7724
Journeyman

Posts: 86
From: Palmdale, CA
Registered: Nov 2000

posted 10-09-2003 01:34 AM     Click Here to See the Profile for Mark T 7724     Edit/Delete Message   Reply w/Quote
I disagree with you KV it depends on what motor you run, I run a 3.25 low gear in a Jerico with 6.00 gears. So it depends on how high your motor makes power. So it is all what you want to do with your car, Street or Track. By the way I hit second in the "Air"

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