TH400 Weight? - Impala Tech
Transmission & Driveline Transmissions & Differentials

 
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post #1 of 10 (permalink) Old 12-14-2018, 03:58 PM Thread Starter
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TH400 Weight?

Does anyone know the approximate weight of a TH400? I'm trying to figure out if I can pull the engine (396) and trans at the same time or should I pull them separately. My hoist has a 1000 lb limit at full extension. Thanks.

1968 Impala SS
496 Stroker
T56 Conversion
3.73 Posi-Trac
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post #2 of 10 (permalink) Old 12-14-2018, 04:13 PM
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Depends upon the capacity of your hoist.

TH400 short output shaft (4" length instead of the 9" used on pick-up trucks or 13" used on motor homes and buses) weight is 130 pounds.

Add another 680 pounds for an all cast iron 396-454 and you get 820 pounds hanging off your engine crane (most cheap consumer versions are limited to only 1000 pounds). Also have to consider how high it can lift it to clear fenders and radiator support. As it goes up it gets closer to the front post not to where you want to put it. I use a five ton commercial engine puller than can lift a Cummins or Detroit V8 diesel engine six feet off the ground and roll it around. My problem with my lift is getting the legs under the car as it is designed for truck maintenance.

Big Dave
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post #3 of 10 (permalink) Old 12-15-2018, 09:43 AM
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Sounds like you have a standard 2 ton cherry picker that you can buy or rent anywhere and you will find in millions of garages. Except for the HF 1 ton model - STAY AWAY FROM. They all go from 2 ton to 1/2 ton at full extension. I & many of my buddies have pulled & installed many big block engine/trans combos together. I would guess more guys pull them together than separately. Don't even give it a second thought.
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post #4 of 10 (permalink) Old 12-15-2018, 04:48 PM Thread Starter
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AC Delco hoist from O'Reilly. 2 ton. I've done a ton of measurements and should be OK weight and clearance wise at full extension. Just never pulled an engine before - much less a BBC - so I'm trying to make sure I've thought of everything.

1968 Impala SS
496 Stroker
T56 Conversion
3.73 Posi-Trac
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post #5 of 10 (permalink) Old 12-16-2018, 11:35 AM
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Don't worry about full extension. We've pulled/installed big block engine/trans combos on my buddies 70 Grand Prix & my 75 Monte. Both about the longest front ends ever put on cars.
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post #6 of 10 (permalink) Old 12-16-2018, 07:31 PM Thread Starter
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Full extension is about the only way I'll be able to pull her outta there. Note the proximity of the cylinder to the front bumper.
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1968 Impala SS
496 Stroker
T56 Conversion
3.73 Posi-Trac
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post #7 of 10 (permalink) Old 12-17-2018, 04:16 PM Thread Starter
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Success!
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1968 Impala SS
496 Stroker
T56 Conversion
3.73 Posi-Trac
68WASAGOODYEAR is offline  
post #8 of 10 (permalink) Old 12-18-2018, 08:24 AM
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Garage


There was a time when I would pick that transmission up and move it as needed.

That time has passed.

1969 Impala convertible build thread here:
https://www.pro-touring.com/threads/...ghlight=impala
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post #9 of 10 (permalink) Old 12-18-2018, 03:58 PM Thread Starter
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Same. Believe it or not, there is no such thing as a transmission stand for a TH400 (that I could find anyway). After separating the trans from the engine, I had it sitting on a piece of 2x10 on my floor jack and while moving it out of the way it rolled off onto the floor. I decided to skip throwing out my back trying to pick it up and just used the hoist to set it back on the jack.

Does anyone know a fair price for a used 396 and TH400? I work with a guy that is interested, but I don't know where to start as far as price. I know it needs a new carb and the trans needs a new pump seal but other than that it runs fine. Everything else about it is mystery. Thanks.

1968 Impala SS
496 Stroker
T56 Conversion
3.73 Posi-Trac
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post #10 of 10 (permalink) Old 12-18-2018, 04:18 PM
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Quote:
Originally Posted by 68WASAGOODYEAR View Post
Same. Believe it or not, there is no such thing as a transmission stand for a TH400 al but other than that it runs fine. Everything else about it is mystery. Thanks.
Something like this is used by professional transmission rebuilders. You can bolt a tranny to an engine stand but it is hard to get inside that way.

https://www.amazon.com/SST-0156-B-Tr.../dp/B011SBHV1U

Big Dave
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