The TH400 is in my '46 Chevy coupe behind a built '70 model 455,it is tough.
Jimmy
doodle@flintemc.net
http://members.flintemc.net/~doodle/index.html
Wayne Osborne wrote:
> Regarding the TH400----I used to have a chevelle 454 with it behind it, man
> which i had that car back... Oh well,
> These are much heavier duty than the 350---I actually won a 50$ bet one
> night as I told a guy i could put my automatic shifter is low gear, and
> never touch the shifter and it would shift into second gear by itself. The
> TH400 will do this---but you'd think the damn motor was gonna blow before
> it did shift. Talk about a jerk when it did---man!!!! Took his 50$ all
> the way to the bank. DISCLAIMER---dont do this--if your motor is not
> strongly built, it may not be healthy for the motor....
> ---wayne
>
> At 07:42 AM 7/18/01 -0700, joe wrote:
> >You kind of answered the question already by the statement "an awful lot of
> >trucks using the 350/400 combo so it must be a good one".
> >
> >Like the 2-bolt / 4-bolt question, the 2 bolt was more of for the non
> >working trucks that weren't going to need the extra low end protection due
> >to added stress from towing or carrying heavy loads. Most all work trucks
> >have the 4-bolt main engines for that reason.
> >
> >The 400 transmission was also the heavier duty item between the two and that
> >is again why you saw it in work trucks or behind Hp engines.
> >
> >I think I remember you saying the truck was mainly going to be used for
> >cruising and so as long as you pick a 700R4 built after 1987 you should be
> >just fine. Your going to love the lower first gear ratio for acceleration
> >and the overdrive for gas mileage. I plan to purchase my 700R4 transmission
> >from Bow Tie Overdrive http://www.700R4.com/ . They got back to me with the
> >following information:
> >
> >The Th-700R4 have the converter lock up which is a marvelous feature for
> >eliminating the heat production inside the converter and increasing your
> >fuel economy while lowering you cruise rpm a couple hundred rpm while locked
> >up.
> >
> >Let me give you some numbers to play with.
> >Th-700R4 (4L60) transmission with a heavy duty torque converter is $1020.00.
> >We use nothing but late model (1988 to 1993) cores. We then perform a
> >blueprint overhaul using only quality brand name components like Raybestos,
> >Alto, Borg Warner, Torrington, Delco Remy etc. Every transmission features a
> >new pump hardened steel pump rotor and vanes, hardened steel guide rings,
> >double and stronger (high rpm operation) slider springs, H.D. Sprag, output
> >Planetary with hardened ring gear and H.D. Pinion gears, New bushings
> >(doubled in most major areas), Custom made (to our specs) one piece teflon
> >seals, high temperature center seal, custom built servo assembly (our
> >design), larger boost valves (both the main and the low/reverse), special
> >accumulators (our design), custom shift calibration (our specification),
> >nine frictions and steels in the 3/4 clutch pack with a special backing
> >plate, special band anchoring just to name a few things. We perform over 40
> >upgrades and modifications for increased durability and strength. The torque
> >converter features a Kevlar friction, largest Lux dampening assembly
> >available, torrington bearing to replace the thrust washer, largest
> >available sprag, new steel pump drive bushing, brazed turbine vanes and the
> >assembly is precision balanced for smooth operation. These converters are
> >available in 1800 or 2200 stall speeds at the above price.
> >T.V. (throttle valve) cable adapter system for your carburetor is $42.00.
> >This cable controls all pressure manufacture and is the major outside
> >influence on shift timing and feel. The importance of getting this system
> >calibrated for your vehicle cannot be overstated. While other companies tell
> >you it's important, we offer the parts and easy to follow instructions on
> >how to establish this relationship correctly. All of our transmissions come
> >with illustrated instructions on this critical set up.
> >Zero to 300 PSI gauge with six foot hose and close 90 degree fitting is
> >$28.00. This is a basic diagnostic tool that we require be installed during
> >the start up and test driving to confirm the pressures are the same as when
> >the transmission left our test stand.
> >Speedometer calibration gear set is $44.00. This is all new Delco parts and
> >is everything except the speedometer cable and the gauge. We will need your
> >tire size and rear end ratio to accomplish this. When you get the
> >transmission installed, all you will need to do is screw the speedometer
> >cable onto the transmission drive gears and your speedometer should be
> >correct! If you are planning to run electronic gauges, there is no charge.
> >These transmissions already have electronic speed sensors built in that will
> >interface with the after market gauges.
> >Brake pedal switch that will disable the converter lock up whenever you
> >press on the brakes. This feature will prevent you from killing the engine
> >if you should skid the rear tires while braking. This switch will replace
> >the old one under the dash.
> >Plug in wiring harness for connecting from the transmission to the brake
> >light disconnect switch or relay.
> >
> >
> >
> >-----Original Message-----
> >From: Rick Carlisle <rcarlisle@home.com>
> >To: oletrucks@autox.team.net <oletrucks@autox.team.net>
> >Date: Wednesday, July 18, 2001 5:13 AM
> >Subject: [oletrucks] TH400 vs. 700R4 transmission
> >
> >
> >>Thanks for the responses on 2 bolt vs. 4 bolt engines. Very helpful.
> >>
> >>I have another question. I was virtually "sold" on using a 700R4
> >transmission
> >>before the 350 engine/400 transmission deal was offered to me. I admit I
> >>really don't understand the significance of one vs. the other except the
> >700R4
> >>has an overdrive that could help on the highway. But I see an awful lot of
> >>trucks using the 350/400 combo so it must be a good one.
> >>
> >>Can someone help me understand the advantages/disadvantages to using the
> >TH400
> >>vs. the 700R4? Thanks.
> >>oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
> >oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
> >
> Wayne Osborne
> 1956 Chevy Pickup
> LaGrange Ga.
> http://www.chevytrucks.org
> http://www.chevytrucks.org/wayne
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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