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three speed vs c4?

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early ford fan
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three speed vs c4?

Post #1 by early ford fan » Mon Jul 26, 2010 8:25 pm

i have a 1962 econoline with a 170 with a 1978 head,three speed,and 3.50 rearend.i also have a c4.i want to install the c4 and change the rear ratio to 3.00 so i can more comfortly drive on the interstate..my van supposedly weighs 2600 pounds.it has 26 inch tall tires.if i do this will i lose accelleration or will the torque converter compensate?

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Re: three speed vs c4?

Post #2 by rbohm » Tue Jul 27, 2010 2:10 pm

8) just changing to the 3.00 gear means you will lose acceleration, regardless of which transmission you use. the torque converter will help compensate slightly, but not enough to really notice. if you want to go with the automatic but also want to lower the final drive ratio for quieter highway cruising, then add a gear vendors overdrive unit to the C4 and keep the 3.50 gear.
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early ford fan
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Re: three speed vs c4?

Post #3 by early ford fan » Wed Jul 28, 2010 8:24 pm

two problems...the gear venders unit costs more than my van did and id end up with a one foot long driveshaft. :mrgreen:

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Re: three speed vs c4?

Post #4 by rbohm » Wed Jul 28, 2010 9:22 pm

early ford fan wrote:two problems...the gear venders unit costs more than my van did and id end up with a one foot long driveshaft. :mrgreen:


what you got some problem with spending lots of money, and having severe drive shaft angles? wussy! :rolflmao: :rolflmao: :rolflmao: :rolflmao:
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early ford fan
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Re: three speed vs c4?

Post #5 by early ford fan » Thu Jul 29, 2010 8:08 pm

if i had two thousand to spend id rebuild the 250 i have in the shed and buy the five hundred dollar computer to use the 4r70w[electronic wide ratio aod]i have in the other shed that bolts right up.lol

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Re: three speed vs c4?

Post #6 by Lazy JW » Fri Jul 30, 2010 2:35 pm

early ford fan wrote:.......if i do this will i lose accelleration or will the torque converter compensate?


This is a tough situation; the C4 will soak up some of power and lose acceleration even if you kept the existing rear gears, switch to 3.00's plus the C4 and your poor little 170 will really be struggling.

This is precisely why 5-speeds were invented but that poses some challenges in itself; an old-style overdrive bolted on to your existing tranny would be ideal but those are rare and I don't know if they are compatible with your present equipment. :hmmm:
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early ford fan
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Re: three speed vs c4?

Post #7 by early ford fan » Fri Jul 30, 2010 5:49 pm

i have a few of those too.the electric solinolds are hard to find.i looked into swapping one into my van.first problem is that altough the bolt pattern is the same they all have v8 input shafts which are 1/2"longer and more splines.so i tried to swap input shafts but the first gear ratio was different so the teeth count is different.i also have a toploader four speed od that i could use if i could find a 1967 up bellhousing but all the ford straight six cars in the junkyards around here.around here have been crushed.

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Re: three speed vs c4?

Post #8 by rbohm » Fri Jul 30, 2010 6:43 pm

early ford fan wrote:i have a few of those too.the electric solinolds are hard to find.i looked into swapping one into my van.first problem is that altough the bolt pattern is the same they all have v8 input shafts which are 1/2"longer and more splines.so i tried to swap input shafts but the first gear ratio was different so the teeth count is different.i also have a toploader four speed od that i could use if i could find a 1967 up bellhousing but all the ford straight six cars in the junkyards around here.around here have been crushed.


8) why not use a 2.77 to 3.03 adapter plate instead of looking for a bell housing?
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Re: three speed vs c4?

Post #9 by early ford fan » Fri Jul 30, 2010 8:26 pm

where do i get that?

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Re: three speed vs c4?

Post #10 by bubba22349 » Sat Jul 31, 2010 12:36 am

A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

early ford fan
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Re: three speed vs c4?

Post #11 by early ford fan » Sat Jul 31, 2010 7:38 am

i can't use a t5 unless i hire someone to sit in back and shift it.lol.

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Re: three speed vs c4?

Post #12 by rbohm » Sat Jul 31, 2010 12:02 pm

early ford fan wrote:where do i get that?


8) try places like autokrafters, virginia classic mustang, national parts depot, dallas mustang parts, even california pony cars, among others.
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Re: three speed vs c4?

Post #13 by 64 200 ranchero » Sat Jul 31, 2010 8:02 pm

i have a c4 with my 200 and it hauls ass lol
60 ford ranchero daily driver. 200 tri power, modified c4 trans, ds2 distributor, msd programable 6al2, weber ict's, 8" rear end with full spool, 3.80 gears, 245 tires, CI dual out header, Dynomax muffler, 114hp shot wet nitrous kit. JE Forged pistons, 280 110lc cam, around 11-1 compression.

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Re: three speed vs c4?

Post #14 by rbohm » Sat Jul 31, 2010 8:32 pm

64 200 ranchero wrote:i have a c4 with my 200 and it hauls ass lol


8) yeah, but that is in a car built for hauling........ :lol: :lol:
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Re: three speed vs c4?

Post #15 by 64 200 ranchero » Sat Jul 31, 2010 9:23 pm

oh i see its in an eccoline, those weigh like doubble what mine does lol :rolflmao:
60 ford ranchero daily driver. 200 tri power, modified c4 trans, ds2 distributor, msd programable 6al2, weber ict's, 8" rear end with full spool, 3.80 gears, 245 tires, CI dual out header, Dynomax muffler, 114hp shot wet nitrous kit. JE Forged pistons, 280 110lc cam, around 11-1 compression.

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