How did I do?
Lead Driver
Joined: Jun 2006
Posts: 5,641
Likes: 968
From: Near Yosemite CA
I'll jump in here on the 3.00 gears... NO! My 66 F100 when I got it had the 240, I went through all the mechanicals and started driving him, I live in the mtns, so I'm either going up or going down, when I'd make a run to Fresburg he was "ok" but just lacking, I figured the 240 was tired, found a 302 I was going to drop in, had a noise in the rear end, pulled the 9" and found I had 3.00's mind you, I have a T18 with granny first gear, so I had to use that to get going... found a guy with 3.70's that wanted 3.00's (remember to look at spline count) I swapped in the 3.70's WOW!!! What a HUGE improvement in drivability and pep!! Brought the rpms up into the sweet spot, mileage went up and the fun factor! I still have that 302 sitting in my shop 
My other 300's all had 4.10's, and with 33's they were perfect, as I said, my 79 F250 4x I drove from Ca to MO averaged 18+ for 1800 miles, granted I kept it between 55-65, but that's the happy spot I found for him, Shrek my 66 F100 likes 55-60.
If you're going to rebuild your 9" I highly suggest going to 3.70's+ depending on tire size...
My other 300's all had 4.10's, and with 33's they were perfect, as I said, my 79 F250 4x I drove from Ca to MO averaged 18+ for 1800 miles, granted I kept it between 55-65, but that's the happy spot I found for him, Shrek my 66 F100 likes 55-60. If you're going to rebuild your 9" I highly suggest going to 3.70's+ depending on tire size...
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Tuned
Joined: Aug 2024
Posts: 406
Likes: 248
I'll jump in here on the 3.00 gears... NO! My 66 F100 when I got it had the 240, I went through all the mechanicals and started driving him, I live in the mtns, so I'm either going up or going down, when I'd make a run to Fresburg he was "ok" but just lacking, I figured the 240 was tired, found a 302 I was going to drop in, had a noise in the rear end, pulled the 9" and found I had 3.00's mind you, I have a T18 with granny first gear, so I had to use that to get going... found a guy with 3.70's that wanted 3.00's (remember to look at spline count) I swapped in the 3.70's WOW!!! What a HUGE improvement in drivability and pep!! Brought the rpms up into the sweet spot, mileage went up and the fun factor! I still have that 302 sitting in my shop My other 300's all had 4.10's, and with 33's they were perfect, as I said, my 79 F250 4x I drove from Ca to MO averaged 18+ for 1800 miles, granted I kept it between 55-65, but that's the happy spot I found for him, Shrek my 66 F100 likes 55-60.
If you're going to rebuild your 9" I highly suggest going to 3.70's+ depending on tire size...
My other 300's all had 4.10's, and with 33's they were perfect, as I said, my 79 F250 4x I drove from Ca to MO averaged 18+ for 1800 miles, granted I kept it between 55-65, but that's the happy spot I found for him, Shrek my 66 F100 likes 55-60.If you're going to rebuild your 9" I highly suggest going to 3.70's+ depending on tire size...
it’s a 2wd with 29” tires, which I like that size. They are just cheap Toyo’s mini van tires but only 3 years old and 90% tread. Once those wear out I’ll put a decent set of AT truck tires on it. I am sure she is a little embarrassed rolling on mini van tires.
ill have do the math for the tire size and rpm range I want to be at but somewhere around 3.50’s should be the sweet spot. A nice balance between town/backroad long distance trips.
My son is 3 right now (my daughter is in collage) but hoping he likes camping/fishing and dirt/mountain biking like me. I think it would be awesome to take lots of dad and son trip in the truck. Time will tell.
this truck’s name is Spirit since it’s a 76 and I was born on 4th of July 1976.
I built a white 68 mustang, her name is Cinderella since it was my dream car and she is white.
Lead Driver
Joined: Jun 2006
Posts: 5,641
Likes: 968
From: Near Yosemite CA
Thanks! I’ll take advice even from a leather neck :-)
it’s a 2wd with 29” tires, which I like that size. They are just cheap Toyo’s mini van tires but only 3 years old and 90% tread. Once those wear out I’ll put a decent set of AT truck tires on it. I am sure she is a little embarrassed rolling on mini van tires.
it’s a 2wd with 29” tires, which I like that size. They are just cheap Toyo’s mini van tires but only 3 years old and 90% tread. Once those wear out I’ll put a decent set of AT truck tires on it. I am sure she is a little embarrassed rolling on mini van tires.
Well... that's not always advisable 
we do chew on crayons for snacks...
Lead Driver
Joined: Mar 2008
Posts: 7,177
Likes: 377
From: Near Los Angeles
My dd is a hp 300. I also have a ZF5 manual trans. My rear gears are 3.31 (can never remember the correct number). I have poor low end power and am wanting to swap in a 3.73 but have been waiting to do a 05+ superduty rear in order to get the parking brake.
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Tuned
Joined: Aug 2024
Posts: 406
Likes: 248
seems like the ZF5 is a popular swap, unless I start long distance drives all the time I think the column shift is cool/different.
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Murphy1966
1961 - 1966 F-100 & Larger F-Series Trucks
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Dec 11, 2018 07:29 AM
