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#1 |
So Many Ideas, So Little Money
Join Date: Sep 2001
Location: Marshalltown, IA
Posts: 1,610
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Overdrive trannys, what have you done?
ok, just curious I have a 3.73 rear witha a TH350 and a 454 ahead of it all. I am curious to look into overdrives not knowing what would handle a 454 ok. I know some say 700r4s won't even handle a built 350 which I know is BS since I've gone and bared tires in a posi 85 Camaro with 3.73, 700R4 and a 350+ HP 350SBC. Just lookin to see what people have done and what it takes. I saw something about a 4L80E a whil back?? what did it take to get that in? costs???
Bryce
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72 Blazer 3/4 ton running gear 4.10s NP205/TH350 350 4in lift half doors 71 C10 with 454 99 S-10 5.1L SBC 700R4 09 Malibu ![]() Marshalltown, Iowa |
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#2 |
14.1 @ 96MPH
Join Date: Jul 2001
Location: Mesa, AZ
Posts: 2,811
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I have a 700R4 behind my (decidedly not built) 350...
They can be built to take the power no problem, it just takes money. Considerably less money, IMO, than a 4L80E, though. 4L80E's are effectively TH400's + OD but they cost an arm and a leg to even get, let alone rebuild and buy the computer for.
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Project1970 - LS1 Swap Complete! ![]() |
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#3 |
CCRider
Join Date: Feb 2000
Location: Olive Branch,MS,USA
Posts: 2,232
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Early 700R4's were crap, even behind weak 305's. As the years went by the factory made many improvements. With the factory improvements and many aftermarket heavyduty parts you can build a pretty stout 700R4. I would still dought how well they would last behind a 454 in a towing situation. If you just want to save some gas a 700 built right would be fine. If you ever want to do some heavy duty towing I would step up to the plate and find a 4L80E. Any gas 3/4 ton Chevy or Sub would have one so you should start seeing more and more in the bone yards. I have one in my 2001 1500HD and it's great. I have a big trailer[8 x8 x20] that I pull at 75 in overdrive no problems. You can get aftermarket computers to make them work and even tailshafts to use a cable driven speedo. Check out this link.
http://www.autotransinc.com/eplace.htm
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72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS |
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#4 |
So Many Ideas, So Little Money
Join Date: Sep 2001
Location: Marshalltown, IA
Posts: 1,610
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you have a 700R4 in ur burb or a 4L60E?? I know the 4L80E would be the best, hell, I only have a TH350 in my truck now, dad has a 94 2500 GMC with 4L80E.. I wouldn't be towing an enclosed trailer, just thinkingthe tiltbedH&H trailer with a car on it. and the occational romp(I am a kid after all!) We have a wll built 700, its just in camaro right now and talkin dad into letting me yank the sucker may be a job...
bryce
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72 Blazer 3/4 ton running gear 4.10s NP205/TH350 350 4in lift half doors 71 C10 with 454 99 S-10 5.1L SBC 700R4 09 Malibu ![]() Marshalltown, Iowa |
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#5 |
Registered User
Join Date: May 2002
Location: Wingate NC
Posts: 456
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87 up 700r4's are going to handle most anything on the street so long as you dont run slicks with it.
The most common upgrades are the vette servo and a hardend sun shell. You can get the best 700r4 info from www.700r4.com They sell heavy duty parts that can take pretty much anything. A 4L80E is pretty much a 400 with overdrive and they cost a arm and a leg. Not to mention they are HEAVY and use a use up a bit more power than a old turbo 400 would. There is also the 200 but Im not all that fond of them. Not saying they cant work but I can get a 700 and build it to last for less $$$.
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Life is good with a 6-71 supercharged 355 in a 72 camaro ![]() |
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#6 |
Recovering 67-72 Addict
![]() Join Date: Oct 2000
Location: North Bend, WA
Posts: 1,788
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I have been trying to stay out of these 700 threads because there are people that are convinced that they are not good for high output engines and I am tired of debating it. I have a 67 Camaro with a stout 427 (over 500 hp and 450 ft/lbs of torque) and have driven it hard including a full day of maximum fun driving at a road course here in Seattle. I love it. I love it so much that I am putting the same thing in my 68 4x4 short step. In both applications I am using the level III from Bowtie Overdrives ( http://www.700r4.com/trans/level3.htm ). These babies are rated at over 600 ft/lbs of torque! Anyway, I strongly endorse these transmissions. As with anything, you just have to make sure that you are matching your components. Don't expect to take a junkyard 700 and put it behind a stout motor and expect it to live. OK, I am staying out of this now
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68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women" |
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