Gear Vendor's Under/Overdrive - The 1947 - Present Chevrolet & GMC Truck Message Board Network

57chevyman · 02-24-2014, 12:45 AM

Anyone here running this?

http://www.superchevy.com/technical/...411sc_od_copy/

Stepside Jim · 02-24-2014, 12:58 AM

Well... purchased, installed, but I'm still working on the build and haven't gotten a chance to use it yet.

I've done a few pictures of the install in my build thread. 1957 Chevy truck re rebuild. ( Yes Ogre, I need to put it in my signature

)

We have one other who has it installed on one of his vehicles, I believe he will be getting one for his 57 Truck.

Next up will be the Gear vendors vs an over drive transmission, personal preference and cost will also need to be considered.

Speedbumpauto · 02-24-2014, 01:42 PM

I used a US Gear V2 unit/TH400. Kind of the same but not as easy to split gears. The down side of the Gearvendors is it's only 22%, I think. The factory OD's are all about 30% as is the unit I chose. The upside of the Gearvendors is the ease of shifting and splitting gears. Mine is either in or out with a mechanical linkage. Mine has only driven in and out of the shop at this point but in today's world and lower prices, I think I would go with a 4L80 derivitive of some sort. Prices were crazy for stand alone's some years ago when I started my project and I was afraid to trust my 500cid big block to a 700R, etc.

mark '87 930 · 02-24-2014, 08:07 PM

Too expensive for my taste, so i swapped transmissions. I ended up with a better OD ration anyway.

mr48chev · 02-25-2014, 12:34 AM

Well beyond my budget, I missed out on a used one for 700 by a half hour a few years ago when I was planning on running the 396 and turbo 400 in the 48. I like them but that would take a years worth of build budget just for the od.

57chevyman · 02-25-2014, 09:21 AM

Beyond my budget too. I was talking to some guy in the neighborhood about my truck . He mentioned the over/under option , but I'd rather swap the tranny for one with OD.
I will always keep the manual trans.....

whitedog76 · 02-25-2014, 10:15 AM

You could always look for a Borg Warner R10/R11 unit. They are what the gear vendors units were based off of. They were found in cars and trucks from the 40's up to the early 70's. Typically on 3 speed trannies, Some Muncies got them too.

This guy sells parts for them:

http://www.fifthaveinternetgarage.co...counter_3.html

Here's some manuals for them.

http://www.speedprint.com/deves50/doc/bwwiring.pdf

http://carburetor-manual.com/borg-wa...ook-p-322.html

mark '87 930 · 02-25-2014, 03:18 PM

Frank, I did the controversial T5 swap with my small block. I drive it like i own it, so it's no muscle machine and doesn't require a bulletproof transmission. Over 95% of the driving i do is on highways, so my objective was to both lower the engine RPM as well as provide better fuel mileage. T5's are a dime a dozen and clutch packs are available pretty much anywhere. When it's all said and done, I spent about $650 Canadian (so like 100$ US

). I as well wanted to retain the stick, so i chose this much more economical route. At 65 mPH, I'm now revving at 1900rpm running 29" tires. The amount of work is slightly more with the fact that you need to get a new clutch, drive shaft needs to be cut, and you need to cut a new hole in the floor for the new shifter location.

If at a later time i fully resto this truck and drop in a big engine, I'll get a Tremec...but i'll likely win the lottery for that one.

02-24-2014, 12:45 AM	#1
57chevyman Registered User Join Date: Oct 2013 Location: Massapequa Park, NY Posts: 873	Gear Vendor's Under/Overdrive Anyone here running this? http://www.superchevy.com/technical/...411sc_od_copy/ __________________ Frank 1957 Chevy 3100 2000 Silverado z71 SOLD 2012 Ram 1500 Quad Cab 1992 International 4700

02-24-2014, 12:58 AM	#2
Stepside Jim Registered User Join Date: Aug 2012 Location: Salem Mo Posts: 647	Re: Gear Vendor's Under/Overdrive Well... purchased, installed, but I'm still working on the build and haven't gotten a chance to use it yet. I've done a few pictures of the install in my build thread. 1957 Chevy truck re rebuild. ( Yes Ogre, I need to put it in my signature) We have one other who has it installed on one of his vehicles, I believe he will be getting one for his 57 Truck. Next up will be the Gear vendors vs an over drive transmission, personal preference and cost will also need to be considered.

02-24-2014, 01:42 PM	#3
Speedbumpauto Registered User Join Date: Aug 2011 Location: Tucson, AZ Posts: 917	Re: Gear Vendor's Under/Overdrive I used a US Gear V2 unit/TH400. Kind of the same but not as easy to split gears. The down side of the Gearvendors is it's only 22%, I think. The factory OD's are all about 30% as is the unit I chose. The upside of the Gearvendors is the ease of shifting and splitting gears. Mine is either in or out with a mechanical linkage. Mine has only driven in and out of the shop at this point but in today's world and lower prices, I think I would go with a 4L80 derivitive of some sort. Prices were crazy for stand alone's some years ago when I started my project and I was afraid to trust my 500cid big block to a 700R, etc.

02-24-2014, 08:07 PM	#4
mark '87 930 Registered User Join Date: Nov 2011 Location: Toronto, Ontario Posts: 222	Re: Gear Vendor's Under/Overdrive Too expensive for my taste, so i swapped transmissions. I ended up with a better OD ration anyway.

02-25-2014, 12:34 AM	#5
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,314	Re: Gear Vendor's Under/Overdrive Well beyond my budget, I missed out on a used one for 700 by a half hour a few years ago when I was planning on running the 396 and turbo 400 in the 48. I like them but that would take a years worth of build budget just for the od. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

02-25-2014, 09:21 AM	#6
57chevyman Registered User Join Date: Oct 2013 Location: Massapequa Park, NY Posts: 873	Re: Gear Vendor's Under/Overdrive Beyond my budget too. I was talking to some guy in the neighborhood about my truck . He mentioned the over/under option , but I'd rather swap the tranny for one with OD. I will always keep the manual trans..... __________________ Frank 1957 Chevy 3100 2000 Silverado z71 SOLD 2012 Ram 1500 Quad Cab 1992 International 4700

02-25-2014, 10:15 AM	#7
whitedog76 Registered User Join Date: Jan 2014 Location: Peoria, IL Posts: 1,450	Re: Gear Vendor's Under/Overdrive You could always look for a Borg Warner R10/R11 unit. They are what the gear vendors units were based off of. They were found in cars and trucks from the 40's up to the early 70's. Typically on 3 speed trannies, Some Muncies got them too. This guy sells parts for them: http://www.fifthaveinternetgarage.co...counter_3.html Here's some manuals for them. http://www.speedprint.com/deves50/doc/bwwiring.pdf http://carburetor-manual.com/borg-wa...ook-p-322.html Attached Images

02-25-2014, 03:18 PM	#8
mark '87 930 Registered User Join Date: Nov 2011 Location: Toronto, Ontario Posts: 222	Re: Gear Vendor's Under/Overdrive Frank, I did the controversial T5 swap with my small block. I drive it like i own it, so it's no muscle machine and doesn't require a bulletproof transmission. Over 95% of the driving i do is on highways, so my objective was to both lower the engine RPM as well as provide better fuel mileage. T5's are a dime a dozen and clutch packs are available pretty much anywhere. When it's all said and done, I spent about $650 Canadian (so like 100$ US ). I as well wanted to retain the stick, so i chose this much more economical route. At 65 mPH, I'm now revving at 1900rpm running 29" tires. The amount of work is slightly more with the fact that you need to get a new clutch, drive shaft needs to be cut, and you need to cut a new hole in the floor for the new shifter location. If at a later time i fully resto this truck and drop in a big engine, I'll get a Tremec...but i'll likely win the lottery for that one.



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