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04-07-2006, 11:14 AM
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#1 |
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Next project: 1970 K10
Join Date: Feb 2004
Location: Fort Collins, Colo 80524
Posts: 6,684
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Which TH-700R4 : Lockup or non-lockup
I want to use a 700R4 in the 68. What is the difference between a lockup and a non-lockup? Is it mearly electronics? Advantages/disadvantages between the two?
 Thanks! Bob
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Bob 1970 Chevy K10 LWB "Goldie" 350/TH350 next project!! 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE |
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04-07-2006, 11:37 AM
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#2 |
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Hittin E-Z Street on Mud Tires
 
Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
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Re: Which TH-700R4 : Lockup or non-lockup
ALL stock 700R4's should have a locking TC.
Locking: ADV: Better fuel economy, lower trans temp, longer trans life. DIS ADV: Need to purchase lock-up kit and tv cable kit. Check out bowtieoverdrives.com for these kits and more information. They are supposedly an easy install and I will be adding them to my truck soon. Non-locking ADV: Don't need to purchase electronics. Dis Adv: lower fuel economy, higher trans temps due to TC slippage, shorter trans life due to TC slippage and excessive heat.
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Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride  American Born, Country by the Grace of God  1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! |
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04-07-2006, 09:46 PM
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#3 |
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Registered User
Join Date: Jan 2001
Location: Killingworth, CT. USA
Posts: 3,378
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Re: Which TH-700R4 : Lockup or non-lockup
I went with the nonlocking TC for simplicity. I logged on aprox 40K with the 700R4 in my truck before I retired it. It was a daily driver and also towed my 22' camper several hundred miles a year. I believe I could have dropped another 100 to 150 rpm's at cruising speed (65 mph) with a lockup, but it still gave me an average of 17 mpg without the lockup. I had a transmission oil temp gauge installed in the out-going cooling line and I never seen it go over 155 degrees F. I did have a auxiliary cooler in line with the radiater cooler. When that truck is reassembled I will probably use that same transmission.
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1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist. |
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04-07-2006, 10:50 PM
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#4 |
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Next project: 1970 K10
Join Date: Feb 2004
Location: Fort Collins, Colo 80524
Posts: 6,684
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Re: Which TH-700R4 : Lockup or non-lockup
Cool, thanks for the info guys!
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Bob 1970 Chevy K10 LWB "Goldie" 350/TH350 next project!! 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE |
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