two transmissions in one vehicle? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigblock73 · 04-08-2004, 01:37 PM

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 · 04-08-2004, 01:55 PM

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 · 04-08-2004, 04:14 PM

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

phantom dually · 04-08-2004, 04:37 PM

WTF why would you need 3 reverse gears??

87Silvy · 04-08-2004, 05:25 PM

Quote:

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

EXACTLY what I was thinking.

C&C Chevy · 04-08-2004, 05:32 PM

Quote:

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

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

*1FaastC10* · 04-08-2004, 08:07 PM

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

1969 GMC · 04-08-2004, 08:37 PM

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 · 04-08-2004, 10:02 PM

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

Grim Reaper · 04-12-2004, 01:39 PM

Quote:

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 · 04-12-2004, 03:29 PM

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

messed up c-10 · 04-12-2004, 07:51 PM

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 · 04-13-2004, 04:31 AM

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 · 04-13-2004, 12:27 PM

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

04-08-2004, 01:37 PM	#1
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,824	two transmissions in one vehicle? 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. __________________ Jeff 73-87.com 73-87.com Facebook page 73-87 cab corner 6x9 speaker brackets for sale 67-72 cab corner speaker brackets for sale 47-54 cab corner speaker brackets for sale

04-08-2004, 01:55 PM	#2
Low87on20s Live from Atlanta Join Date: May 2003 Location: Atlanta, GA Posts: 511	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... __________________ Paul

04-08-2004, 04:37 PM	#4
phantom dually Project92 SWB stepside Join Date: Feb 2003 Location: Louisville KY Posts: 4,792	WTF why would you need 3 reverse gears?? __________________ 92 C1500 stepside 496 Stroker Competiton Engineering Ladder bars/QA1 coilovers. Dana 60 rear with 4.10 gear and posi. Bonspeed Palisade 20x12 in rear w/335/30/20 and 20x8.5 front w/245/40/20. 5/8 drop with Belltech springs/DJM spindles/drop shocks. WWS Progress thread http://67-72chevytrucks.com/vboard/s...d.php?t=140448

04-08-2004, 08:37 PM	#8
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	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... __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

04-12-2004, 07:51 PM	#12
messed up c-10 RHCP afficianado Join Date: Oct 2002 Location: McLoud, OK Posts: 789	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. __________________ ~Ryan~ 89 S-10 Blazer with a 4.3L 96 Ford Crown Vic P71 4.6L V8. This car rocks. Here are some links to some good music. Jack Johnson Donavon Frankenreiter

04-08-2004, 04:14 PM	#3
NeCrOmAnCeR Registered User Join Date: Feb 2004 Location: Hodgenville, Ky Posts: 735	I'd like to see how they provide hydraulic pressure to the second tranny.

04-08-2004, 08:07 PM	#7
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,399	MJ at CK5 is rumored to be working on putting dual SM465s in his truck.

04-08-2004, 10:02 PM	#9
edog1 Registered User Join Date: Oct 2003 Location: Santa Maria ,CA Posts: 142	I remember reading about that in a Car mag back in the late 80's or 90's.

04-12-2004, 03:29 PM	#11
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	i can understand 2 tcases, but 2 trans... dont guess i ever thought about it.

04-13-2004, 04:31 AM	#13
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	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.

04-13-2004, 12:27 PM	#14
arveetek Ultimate Diesel Dude Join Date: Oct 2002 Location: Southwest Missouri Posts: 328	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 __________________ Project truck: '81 C/20 converted to 6.2L TURBO DIESEL bored .040", gear drive, 6.5L injectors/pump, custom pistons, custom 4" exhaust, 700R4, 4.10's Daily Driver: '95 K1500 Tahoe, 6.5L TURBO DIESEL, NP241, 4L80E, 3.42's



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