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  #1  
Old 12-11-2002, 12:01 PM
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Ted Bromback Ted Bromback is offline
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Question Cheap & Creative? or just Crazy?

I'm thinking of someday building Rod from scratch, being an experienced welder. I had this wild idea the other day, always thinking of the cheap way out because I don't have much money.
Hp V8 Mopar. of course, high geared rearend, put two 727's or 904's in tandem would give you a six speed. Welding first drive shaft to plate bolted to flex plate of second trans. I'm I crazy?
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Old 12-11-2002, 12:12 PM
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rumblefish360 rumblefish360 is offline
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Default And they call me the mad one!

You can do it? Go for it. Weird things get done by hot rodders. You wanna try something like this, don't ask us, show us.
GEar Vendors Overdrive makes a bolt on unit that splits the gear ratios of the tranny. Thus making a 3spd 727 or 904 a 6 spd.
Likewise, a 518 would become an 8spd tranny.
Combine this with a dual gear rear end for more top end.

The hotrodder never sleeps easy on what could "BE" the next big thing, or just something different. Nothing like a one of a kind you custom made.

Is it possible to do, only you'll find out if you try.

Good luck.
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Old 12-11-2002, 12:24 PM
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There was something similar in Hot Rod a few years back. The guy had 2 Chevy transmissions tied together. You don't want a High Rear end ratio because of the multiple reductions of both transmissions. I think the guy in the magazine was running something close to a 3:1 rear end and the car went 12's on a mild engine. Kind of fun to play with the numbers. What's a TF's first gear ratio??? 2.66??

2.66 x 2.66 x 3.23 = 22.84

compared 1 trans with a 4.56 rear

2.66 x 4.56 = 12.13

Heck, you'd be better off with a 2.76 or lower highway gear:

2.66 x 2.66 x 2.76 = 19.52
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Old 12-11-2002, 12:30 PM
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Sounds good so far...

my concern would be that the torque would be multiplied by the first trans feeding into the second, so the second would need to be pretty stout, a well built 727 would do it. You would also be looking for the short tailshaft trannies like out of A vans from the 60's. Would you run the transmission lines together or run separate coolers? I would guess the second would run cooler due to a lack of torque converter. That would be one freaking deep first gear man! 2:73 gears I'm thinking.
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Old 12-11-2002, 12:37 PM
Billydelrio Billydelrio is offline
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Why not just put the second tranny in backwards. This will give you a 2.45:1 low gear and a .408:1 overdrive. Of course, the planetary gears will need to be turned around. Naaa.

Two transmissions inline will work fine. You will only need one converter. The second transmission will need to be strong as it will see 2 1/2 times the torque of the first while the first is in low gear. This will be nice with two pushbutton type shifters. The transmission hump will be a long one.

Billy
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Old 12-11-2002, 02:30 PM
Doug Wilson Doug Wilson is offline
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I really like the idea.

Wouldn't you have a bit of a problem with the front pump on the rear trans??? - like the old ClutchFlytes did??
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Old 12-11-2002, 02:35 PM
6pakman 6pakman is offline
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my friend, you need a worth while hobby to get your mind ticking. how about welding?
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Old 12-11-2002, 02:38 PM
Doug Wilson Doug Wilson is offline
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I like welding... but it's just so hard for me to tote the anvil around.
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  #9  
Old 12-11-2002, 05:12 PM
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Ted Bromback Ted Bromback is offline
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Biggrin I might just do it!

Thanks for the input Guys. I was thinking of a low ratio (high gear) like 2:73 and using both torque converters, and two coolers. Probably a stock 318 to start with, in a rectangular tubing frame and a home-made '33 vicky looking body w/trans hump between front seats and one hump between back seats.
I'll let you know, it may be a few years.
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Old 12-11-2002, 05:46 PM
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Ted,
To answer your main question: yes, you are crazy.
And that'd be one helluva trans tunnel!
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Old 12-11-2002, 10:05 PM
Billydelrio Billydelrio is offline
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You could cut the bell off of the second tranny and use a drive hub to spin the second pump, or use the pump of the front transmission to supply pressure to both. The front can be fully automatic and the rear fully manual!

I think we are going beyond high performance and getting into exotic performance.
Billy
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Old 12-12-2002, 01:50 AM
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dave571 dave571 is offline
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Or better yet use a manual for the second trans, no pump required!


Now that would be wierd!!

I suppose you could use an early iron torqueflite, as the second trans. bolt the forward clutch pac together so it will always have first gear, and once the car is moving the rear pump in the trans will give you line pressure for the other gears.

The second trans won't have reverse, but you won't need it, because the front one will.

Does that work, or am I confusing everyone as much as I'm confusing myself??

I guess the real answer is "Yes, you're crazy" because I think you'll have way to much gear reduction for any practical application.
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Old 12-12-2002, 06:35 PM
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Quote:
Originally posted by dave571
Or better yet use a manual for the second trans, no pump required!


Now that would be wierd!!

I suppose you could use an early iron torqueflite, as the second trans. bolt the forward clutch pac together so it will always have first gear, and once the car is moving the rear pump in the trans will give you line pressure for the other gears.

The second trans won't have reverse, but you won't need it, because the front one will
Hey Dave
I would think you would want the second trans to have reverse.
If it were in the first,what would be the effect of turnning the
input shaft in the wrong direction?
All in all I think I would rather run 2 identical engines and one trans.
A v16 sounds better to me.
I once saw a front engine rail with 2 big blocks tied together.
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