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03-21-2013, 08:40 PM
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#1 |
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Registered User
Join Date: Jan 2013
Location: sacramento, california
Posts: 21
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Transmission and Gears!
Im gonna be running a 454 40 over hydraulic cam, Im thinking of going with a
700R4 what is your guys knowlege for best performance for street and highway to have fun and cruise, so I dont have to go 55 on the freeway, ha. |
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03-21-2013, 10:46 PM
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#2 |
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Senior Member
 
Join Date: Jan 2002
Location: Williston, ND
Posts: 2,999
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Re: Transmission and Gears!
i have a built th400 and 3.42 gears in my 72. The stall in the tranny is 2800 and at 65 mph it just gets to lockup. It cruises really well on the highway.
__________________
68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi |
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03-22-2013, 07:21 AM
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#3 |
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Registered User
Join Date: Jan 2011
Location: Chattanooga, TN
Posts: 2,165
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Re: Transmission and Gears!
What size tires are you running?
__________________
'83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project |
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03-22-2013, 08:46 AM
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#4 |
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Senior Member
Join Date: Jan 2002
Location: Williston, ND
Posts: 2,999
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Re: Transmission and Gears!
Let me double check but I think 295/65/15 in the back
Posted via Mobile Device
__________________
68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi |
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03-23-2013, 12:50 PM
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#5 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,727
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Re: Transmission and Gears!
That's a 30" tall tire. Is this a fuel injected motor? With the TH700 I would run at least 4.10 if not 4.56. 30" tire with 4.10 at 70 mph = 2250 rpm and with 4.56 = 2500 rpm. Fuel injection would allow it to work better at the lower rpm than a carb, the cam you choose will also make a difference. With a .050 duration of 210 degrees or less the 4.10 would be my choice. Also allowing you higher speed when towing if you stay in 3rd gear which I would recommend with the 700 and any real weight (5000# or more). With a .050 duration of 220 degrees or more, I'd go with the 4.56 and something in the middle either gear would probably work well.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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