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#1 |
Senior Member
Join Date: Sep 2006
Location: Vancouver, WA
Posts: 1,015
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700R4 question
Hey guys, what are the "good" years of 700R4's wasn't there something about the earlier ones had weak parts in them or somehting? I found a deal on an 88 700R4 out a cop car & I'm wondering if that is worth messing with. it's for my 71 C-10 with a 350
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#2 |
Registered User
Join Date: Feb 2007
Location: Austin, TX
Posts: 3,930
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Re: 700R4 question
Not sure exactly on the years but I believe it's 1987 and up that had better parts in them. With a 700R4 though, I would definetly go for a rebuilt one either way. Anything used and still on the factory build will probably not last long.
Last edited by Pyrotechnic; 03-13-2007 at 06:34 PM. |
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#3 |
Registered User
Join Date: Jan 2006
Location: Morro Bay C.A
Posts: 179
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Re: 700R4 question
87 and up i believe was the 30 spline. i believe they also had the better lockup... not totally positive though..i would go with something above 87
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'69 C10 SWB 350 edelbrock int/carb .420 .442 cam 700r4 70 lwb c10 work truck 250 I6 with two inch lift springs and a two inch bodylift and 33/12.5s |
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#4 |
Registered User
Join Date: Apr 2006
Location: MinneSNOWta
Posts: 1,381
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Re: 700R4 question
I also believe that the truck tranny's were beefier than the car tranny's.
I see it alot in the 3rd gen Fbody crowd, people ditching their 84-87 700's in favor of the early 90's Truck 700's. I will be running a 700r4 from a 92 camaro, primarily because i have one sitting in my garage. I recently sold my 84 camaro, and it was one of my unused parts, so i may as well put it to use.
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2003 GMC Sierra 1500 WT 1995 Nissan Hardbody 2016 Hyundai Veloster Turbo DC2 (SW/AW) Clyde W. Harvey USN "Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery" Winston Churchill |
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#5 |
Senior Member
Join Date: Sep 2006
Location: Vancouver, WA
Posts: 1,015
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Re: 700R4 question
cool, thanks you guys, I'm gonna pass on this one cause they say the mileage is unknown, my search continues.
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#6 |
Senior Member
Join Date: Oct 2006
Location: Edmonton Alberta
Posts: 458
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Re: 700R4 question
87 and up are good trannys because they use an auxilary valve body and most updates are done. Stay away from 83 and 84 which had 27 spline input. V6 trannys have less clutches and are less desirable.
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#7 |
Registered User
Join Date: Mar 2007
Location: C-Town, OK
Posts: 9
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Re: 700R4 question
did they make manual (not computer operated) 700r4s past 1987?
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#8 |
Hittin E-Z Street on Mud Tires
![]() Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
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Re: 700R4 question
All 700R4's had computer assisted operation.
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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! Last edited by 67ChevyRedneck; 03-14-2007 at 10:52 AM. |
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#9 |
Registered User
Join Date: Feb 2007
Location: Austin, TX
Posts: 3,930
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Re: 700R4 question
All factory transmissions have the electronic lockup clutch, but I've seen some that have been modified to engage the lockup hydraulically. Thats strictly an aftermarket thing though.
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#10 |
Senior Member
Join Date: Oct 2006
Location: Edmonton Alberta
Posts: 458
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Re: 700R4 question
the 700 is not computer controled, the lockup is elecricaly controled but has no computer to run it. All 4l60 trannys are a computer controled version of the 700 which is why they dont have a tv cable. The diesel trucks were hydraulically locking tcs from the factory, which is what i do to my 700s instead of running wires.
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#11 |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,477
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Re: 700R4 question
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Here's the skinny. The most desireable ones for our trucks with the stock type engines are the 1985-88 passenger car & trucks. The pre 85 units are not as strong and the later ones use electronic sensors to operate properly. The rear tranny mount will have to be moved also. I had to drill new holes in the frame for mine... If it's a decent looking one & cheap enough I'd probably buy it and have it checked out and rebuilt if it needs it. LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 03-14-2007 at 06:23 PM. |
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#12 |
Senior Member
Join Date: Sep 2006
Location: Vancouver, WA
Posts: 1,015
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Re: 700R4 question
Hey thanks LocDoc, I do want a good one, & the only reason i was considering one from a car is they said it was from a cop car, & I'm sure those would have some beefier components in them, it was only $225 but there was no pic & the Mileage was unknown.
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#13 |
Senior Member
Join Date: Oct 2006
Location: Edmonton Alberta
Posts: 458
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Re: 700R4 question
the only difference to the fuel injected 700s is the electronic speedo gear which can be changed easily. The fuel injected 700s use 10 or 13 vein pump instead of 7 vein, and the drum and planetary are updated also
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#14 |
Senior Member
Join Date: May 2004
Location: johnstown, NY
Posts: 2,393
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Re: 700R4 question
don't mean to hijack, but what is the more desirable tranny for a street truck, a thm350 or the later 700r4? just starting to learn about trannies...
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#15 |
Registered User
![]() Join Date: Feb 2007
Location: Star Valley, WY
Posts: 2,038
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Re: 700R4 question
strength wise they are similar. The 700r4 has a steeper 1st gear at 3.06 versus the the TH350's 2.52. The 700 will launch you out of the hole faster and has a .73 overdrive.
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#16 |
Senior Member
Join Date: Oct 2006
Location: Edmonton Alberta
Posts: 458
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Re: 700R4 question
everyone loves the 700 but they are more likely to fail compared to the 350. For strength the 400 or 4L80 are king.
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#17 |
Registered User
![]() Join Date: Feb 2007
Location: Star Valley, WY
Posts: 2,038
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Re: 700R4 question
stock units tend to fail however any local reputable tranny shop can build a unit that can stand a lot of torque and won't cost too much over a standard rebuild. I'ver ran a 700R4 in 4x4 applications behind a supercharged small block, stroker, and a big block. I liked it for towing but admittingly it will last longer with a steeper rear gear.
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