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  C4 Trans Gear Ratio.....

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Author Topic:   C4 Trans Gear Ratio.....
70 Pony
Gearhead

Posts: 1815
From: Glenmoore, PA, USA
Registered: Jan 2000

posted 07-19-2001 10:51 PM     Click Here to See the Profile for 70 Pony   Click Here to Email 70 Pony     Edit/Delete Message   Reply w/Quote
Can anyone tell me what the 1st gear ratio is on a 1970 C4....and is there a way to increase this ratio in order to get...a steeper rear gear advantage without change the rear ratio.....
In other words getting say 4.00 to 1 rear results out of a 3.55 by upping 1st gear ratio...
Thanks

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EDDIE D
Resto Mod '70 Sport Roof
Arrest Me Red

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7DMACH1
Gearhead

Posts: 2281
From: PHILA. PA.
Registered: Feb 2001

posted 07-19-2001 11:17 PM     Click Here to See the Profile for 7DMACH1   Click Here to Email 7DMACH1     Edit/Delete Message   Reply w/Quote
I can solve it. Real race cars have three pedals!!! LOL. Ray

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1970 MACH 1 351C 4SPD
1986 CAPRI 5.0 5 spd.
2001 LINCOLN LS V8

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kid vishus
Gearhead

Posts: 6006
From: middle of NC
Registered: Oct 2000

posted 07-20-2001 12:03 AM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
First gear is 2.47 I believe. You can buy a different planatery set for them, a 2.75 ratio. ATI makes them as does several other manufacturers.

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JAAZZY
Gearhead

Posts: 772
From: Bay Area, CA
Registered: Apr 2001

posted 07-20-2001 12:14 AM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote

I don't know the first gear ratio but I think it is about 2.5-2.6. I know different gears are available but I think they are expensive. Try these guys:

Art Carr 888-526-5868
Performance Automatic 800-767-8174

I never purchased them so I don't know anything about the quality. Good luck.

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mustangs68
Moderator

Posts: 21889
From: Buckroe Beach Va MCA#39406 M&M #12 Member Mustang Club of Tidewater
Registered: May 99

posted 07-20-2001 12:56 AM     Click Here to See the Profile for mustangs68   Click Here to Email mustangs68     Edit/Delete Message   Reply w/Quote
Eddie,
I had my C4 redone (rebuilt) with all TCI parts and StreetFighter converter and happy:0

sam

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Rustang
Gearhead

Posts: 709
From: Clarion PA
Registered: Nov 2000

posted 07-18-2001 11:01 PM     Click Here to See the Profile for Rustang   Click Here to Email Rustang     Edit/Delete Message   Reply w/Quote
I'm pretty sure the ratios are 2.46, 1.46, then 1:1

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mellowyellow
Gearhead

Posts: 6609
From: So. Fl.
Registered: Aug 2000

posted 07-19-2001 08:31 AM     Click Here to See the Profile for mellowyellow     Edit/Delete Message   Reply w/Quote
There is a co.article in M&Fords that featured a c-4 with different 1st and intermediate gears, leaving the final original. Sounds good---particularly if a person doesn't have "gears in the rear"!!!!

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70 Pony
Gearhead

Posts: 1815
From: Glenmoore, PA, USA
Registered: Jan 2000

posted 07-20-2001 08:37 AM     Click Here to See the Profile for 70 Pony   Click Here to Email 70 Pony     Edit/Delete Message   Reply w/Quote
Thanks all/....as usual, very informative replies....
Hey Ray.....love the 4 speed...and every once in a while get the urge to go "Stick"..
Then again.....getting too old and uncoordinated for 3 pedals.....hard enough with 2....
I'll check out the sights and co's you all mentioned....
Would love a little more pull in first...but want to keep the 3.55's for cruising..

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EDDIE D
Resto Mod '70 Sport Roof
Arrest Me Red

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