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| | | | Joined: Mar 2010 Posts: 10,309 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,309 | I have a plain Jane 350 to go in a '49 3100.
I am leaning towards a 1985-1990 700R4 transmission.
What would be the best rear axle ratio for this combination?
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Aug 2013 Posts: 568 Shop Shark | | Shop Shark Joined: Aug 2013 Posts: 568 | 3:73 nice all around gear
What size rear tire are you running?
Last edited by Hollow65; 02/02/2015 12:08 AM.
I can explain it to you, I can't understand it for you.
| | | | | Joined: Mar 2010 Posts: 10,309 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,309 | Stock tires and rims for a AD 3100.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Aug 2013 Posts: 568 Shop Shark | | Shop Shark Joined: Aug 2013 Posts: 568 | 3.73 would be real nice then. Best of luck to ya
I can explain it to you, I can't understand it for you.
| | | | | Joined: Jun 2005 Posts: 1,003 'Bolter | | 'Bolter Joined: Jun 2005 Posts: 1,003 | Carl, I'm working on the same set up for my 41. My research on the 700r4 shows 87-92 was the better years. Can't remember what change was made for '87, but I can try to find it.
~ Victor 1941 3/4-Ton Pickup (in process). Read about it in the DITY Gallery1955 Grumman Kurbside "Doughboy" 235/3 on tree w/ OD 1957 3100 - moved on 1959 C4500 Short Bus "Magic Bus" - moved on 1959 G3800 1 Ton Dually "Chief" - moved on 1958 C4400 Viking "Thor" ~ moved on to fellow Bolter | | | | | Joined: Aug 2013 Posts: 568 Shop Shark | | Shop Shark Joined: Aug 2013 Posts: 568 | Check a 200r4 also. Lower first gear ratio.
I can explain it to you, I can't understand it for you.
| | | | | Joined: Mar 2010 Posts: 10,309 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,309 | Carl, I'm working on the same set up for my 41. My research on the 700r4 shows 87-92 was the better years. Can't remember what change was made for '87, but I can try to find it. What year did they go away from mechanical speedometer? Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Apr 2005 Posts: 2,102 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,102 | My 88 Silverado has the electronic speedometer.
Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
| | | | | Joined: Jun 2005 Posts: 1,003 'Bolter | | 'Bolter Joined: Jun 2005 Posts: 1,003 | 93 is when the shifting logic went electronic, but I think the electronic speedometer was a couple years before that.
It's my understanding the tailshaft (4 bolt) can be changed out from an earlier mechanical speedometer tranny, even a 350, to install the mechanical speedometer gear.
~ Victor 1941 3/4-Ton Pickup (in process). Read about it in the DITY Gallery1955 Grumman Kurbside "Doughboy" 235/3 on tree w/ OD 1957 3100 - moved on 1959 C4500 Short Bus "Magic Bus" - moved on 1959 G3800 1 Ton Dually "Chief" - moved on 1958 C4400 Viking "Thor" ~ moved on to fellow Bolter | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | Check a 200r4 also. Lower first gear ratio. The 700R4 has a lower first gear that the 200, 3.06:1 in the 700, 2.74:1 in the 200. Also, the 200 was never used in full size trucks.
Bill Burmeister
| | | | | Joined: Aug 2013 Posts: 568 Shop Shark | | Shop Shark Joined: Aug 2013 Posts: 568 | You're right longbox, it was a smoother 1-2 shift I was thinking.
I can explain it to you, I can't understand it for you.
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