two transmissions in one vehicle?

[bigblock73]

I have heard of Advanced Adaptors OD/UD units, but NEVER heard of installing two transmissions together!

Here is the truck.

A column shift AND a floor shift? Sounds confusing.

[Low87on20s]

Hey, with 3 reverse gears...I could put one of those in my truck and go race the "ricers" in reverse at the local drag strip.

I'll tell them it's a new front wheel drive experimental...

[NeCrOmAnCeR]

I'd like to see how they provide hydraulic pressure to the second tranny.

[phantom dually]

WTF why would you need 3 reverse gears??

[87Silvy]

Originally posted by phantom dually
WTF why would you need 3 reverse gears??

EXACTLY what I was thinking.

[C&C Chevy]

Originally posted by phantom dually
WTF why would you need 3 reverse gears??

Probably why there not widely known. Never heard of them.

[1FaastC10]

MJ at CK5 is rumored to be working on putting dual SM465s in his truck.

[1969 GMC]

i can see the advantage of two trannies in a rockcrawler...but not in a street truck. especially two TH400's...i could maybe see a th400 mated to an overdrive trans of some sort...

[edog1]

I remember reading about that in a Car mag back in the late 80's or 90's.

[Grim Reaper]

Originally posted by 1FaastC10
MJ at CK5 is rumored to be working on putting dual SM465s in his truck.

That's been done. Lot of Toyotas 4x4's will put in doal 5 speeds. Gets some ungodly low crawl ratios up around 400:1 I have heard of a 465 on the back of a TH400 but you had to be stopped to shift the 465. It was for rock crawling so not really a problem.y.

I guess I can see the reasoning for a 2wd tow rig. It would be like a one up on a gear splitter. Seems wasted on a 2wd for drag racing.

[Prerunner1982]

i can understand 2 tcases, but 2 trans... dont guess i ever thought about it.

[messed up c-10]

would that be good for highway travel or is that mostly good for offroading? If its cheaper than a gearvenders setup then maybe I can look into doing something like that then I might not have to sell my truck.

[jimfulco]

I went goose hunting in S. La. years ago & the guy who owned the place had a marsh buggy made from an old shorty school bus with the top cut off at window level, tractor tires set up duallie-style, & 2 3-speed trannys in tandem.

[arveetek]

I've seen lots of tandem manual transmission setups and tandem automatic/manual setups, but never tandem automatics! How weird! According to the literature, the second tranny doesn't have a pump. I can see some tubing hooking the two together, so I would bet that the first tranny supplies hydraulic pressure to the rear one. Strange. The pamphlets look old. I wonder if it never caught on.

A friend of mine has an old 65 Ford F-100 with two manual trannys. It makes a great crawler out in the hayfield.

A lot of the older over the road trucks had two transmissions, with two gearshifts sticking out of the floor. The front transmission was a regular 5 or 6 speed forward gears and reverse, while the second tranny was just a 3 speed underdrive, direct drive, and overdrive. In fact, my dad has a custom built truck with an Allison auto followed with one of those 3 speed manuals.

Casey