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03-10-2015, 11:43 AM | #1 |
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Location: Columbiana Ohio
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Anyone using Gear Vendors Over/Under Unit?
Anyone here using the Gear Vendors Over/Under unit on a TH350 or TH400? You like? Pros and cons? Im reading it makes you 3 speed act like a 6 speed high/low.
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"Hey... its only time and money right? Just do it." 67 Short Bed under major construction http://67-72chevytrucks.com/vboard/s...=651356&page=8 |
03-10-2015, 12:50 PM | #2 |
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Location: Victoria, B.C
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Re: Anyone using Gear Vendors Over/Under Unit?
A buddy of mine went the Gearvendors route in his '68 Charger RT/440. He seems to like it....makes it interesting.
It hasn't given him any real problems at this point...and his (440) engine is making some nice power through it. The main advantage is the top highway gear....the other gears don't make too much difference to any regular driving (mostly novelty shifts)....so consider it for the overdrive (top gear) advantage only. That said, they are not giving it away by any means from a price point. I would simply look for a Heavy duty 700 Series or a 4L60....probably quite a bit cheaper and simpler swap out. all good Coley
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03-10-2015, 02:35 PM | #3 |
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Re: Anyone using Gear Vendors Over/Under Unit?
I had one on my 1970 CST that I sold a couple of years ago. It was fun. Pretty pricey though. I liked it. The new owner likes it too. It was on a TH350 and it was easy to install.
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Larry 1949 Willys CJ2A, Kubota Turbo Diesel engine, Warn Overdrive, 11 inch brakes, 12volt, Warn M8000 Winch "Little Green" 1970 Rustoleum Roller Red C20 Custom Camper 454 TH400 "Big Red" 1971 K20 6.2 Turbo Diesel 4x4 4spd Ranger Overdrive "Pumpkin Wagon" 2005 VW Beetle Diesel 44+ MPG "Silver Bullet" |
03-10-2015, 06:57 PM | #4 |
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Location: Katy TX
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Re: Anyone using Gear Vendors Over/Under Unit?
I have two of them both behind my 650 hp blower motors. that is the main reason for both. the gear vendors will handle up to 1200 hp in their stock configuration and can be modified to hold 2000 hp. I agree with others here that they are pretty expensive but the really work well for high HP engines. one is 12 years old and the other is 9 years old and both have seen the rath of these blower motors with out a hint of problems.
my other vehicles with stock engines all have 700 r or 4l60 in them. the only reason I would use a gear vendor is hp over 500.
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03-11-2015, 01:39 PM | #5 |
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Re: Anyone using Gear Vendors Over/Under Unit?
Yeah that do cost a lot but I like how it splits the gears keeping you in the power making RPM range with no over revving or lugging. That and the OD. Still mowing over options....
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"Hey... its only time and money right? Just do it." 67 Short Bed under major construction http://67-72chevytrucks.com/vboard/s...=651356&page=8 |
03-11-2015, 06:52 PM | #6 |
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Re: Anyone using Gear Vendors Over/Under Unit?
I rode in a 72 GMC once that was powered by the GM 300hp crate motor. We were pulling a 37 chevy on a car trailer through the mountains. I was real impressed how effortless the truck was working when the gears were split.
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03-11-2015, 09:57 PM | #7 | |
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Re: Anyone using Gear Vendors Over/Under Unit?
Quote:
The trans/overdrive combo is long (on mine the yoke is just 8 inches in front of the trailing arm crossmember) so you will need a MUCH shorter driveshaft. It will handle more torque than a 700R4 so for me it was a much better choice. |
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03-11-2015, 10:06 PM | #8 |
Vintage 4x4s
Join Date: Sep 2010
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Re: Anyone using Gear Vendors Over/Under Unit?
For the granny 4 spds (really 3 spds) wide ratios-the gearvendors benefit of filling in the gaps is probably the biggest advantage
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03-13-2015, 10:45 AM | #9 | |
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Re: Anyone using Gear Vendors Over/Under Unit?
Quote:
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"Hey... its only time and money right? Just do it." 67 Short Bed under major construction http://67-72chevytrucks.com/vboard/s...=651356&page=8 |
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02-09-2017, 01:40 AM | #10 |
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Re: Anyone using Gear Vendors Over/Under Unit?
Ttt. I am thinking about putting a gv in my swb and wanted to know if the cross member needs to be moved as well. My bad just realized Fitz account was suspended.
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02-09-2017, 02:53 AM | #11 |
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Re: Anyone using Gear Vendors Over/Under Unit?
Have one in my motorhome absolutely awesome especially for towing. One of these days I want to put one in my 70. Sure they are pricey but definitely worth it in the long run.
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02-09-2017, 05:08 AM | #12 |
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Re: Anyone using Gear Vendors Over/Under Unit?
Only ones that think they are pricey are those that have not priced out a built 2004r or 7004r /4l60 /4l65 and a good converter and in the electric controlled trans the shift controllers..
You will find the 2200-2300 is not pricey when you find a built g.m. o/d automatic will run you 3500-4500 ... Most that have a 2000-2500.oo built 7004r don't have them last for long.. Many get by with them, but then again never really use the power the engine has either.. A th200 can live behind a 500 hp engine if you never hammer it.. |
02-09-2017, 08:47 AM | #13 |
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Re: Anyone using Gear Vendors Over/Under Unit?
I was going to say the same type of thing. A Gear Vendors unit isn't expensive at all when you figure they all outlast even the best O/D automatic. GVs get taken from one vehicle and moved to the next when their host vehicle gives up the ghost. And, if you ned brute strength, they are the way to go. It's a gear box, nothing complex.
I had one in the diesel '84 K/30 I had with Banks Sidewinder. I absolutely loved it behind that TH400. I plan to one day have one in my '67 SWB 327/M22/3.42s for an ultimate hot travelin'/haulin' truck rod.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
02-09-2017, 10:44 AM | #14 |
2WD Jimmy
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Re: Anyone using Gear Vendors Over/Under Unit?
A Great piece of equipment. Top Notch reliable.
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02-09-2017, 10:49 AM | #15 |
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Location: Arvada Colorado
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Re: Anyone using Gear Vendors Over/Under Unit?
I did not have to move the crossmember at all. I had a short shaft TH350 and the GV adapter just bolted on to the back of the transmission. I did have a new shorter driveshaft made. Very easy install as I recall.
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Larry 1949 Willys CJ2A, Kubota Turbo Diesel engine, Warn Overdrive, 11 inch brakes, 12volt, Warn M8000 Winch "Little Green" 1970 Rustoleum Roller Red C20 Custom Camper 454 TH400 "Big Red" 1971 K20 6.2 Turbo Diesel 4x4 4spd Ranger Overdrive "Pumpkin Wagon" 2005 VW Beetle Diesel 44+ MPG "Silver Bullet" |
02-09-2017, 12:05 PM | #16 | |
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Re: Anyone using Gear Vendors Over/Under Unit?
Quote:
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02-09-2017, 12:56 PM | #17 |
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Re: Anyone using Gear Vendors Over/Under Unit?
I have a 2wd, 1987 Sub. 2500, 454, t-400 with 4:10 rear gears. The PO installed a US Gear under/overdrive unit, and I love it.
I agree that you don't switch up and down with each shift, (not practical) but it is useful when running empty to reduce the engine rpm. It takes the 4:10 and reduces it to about 3:10. I have towed many times in the lower numerical range, and the truck responds well with plenty of power. If you get into hills, lower gearing is just a click away. As far as fuel economy, there is no such thing with a 454/t-400 combo, but I figure that keeping the RPMs down at highway speeds is good for my engine. Greg |
02-09-2017, 02:30 PM | #18 | |
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Re: Anyone using Gear Vendors Over/Under Unit?
Quote:
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02-09-2017, 06:07 PM | #19 |
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Location: Santa Ana, CA
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Re: Anyone using Gear Vendors Over/Under Unit?
I've had my Gear Vendors unit for several years now in my K5 Blazer. Had it hanging off the back of my NP205 transfer case when I ran a TH350 auto, and now have it hanging off the back of the same NP205, but now I run an SM465 4 speed. Probably the best upgrade I've ever made, and I've made a lot of nice performance upgrades As others have said, it is a very strong unit. Change the oil/ATF every now and then and it will last a lifetime. As others have said, it provides nice overdrive for cruising down the freeway. But I find that I use it more to help me tow heavy loads over the mountain passes. With my manual tranny, it allows me to split every forward gear to keep the engine in the power band. I have 1st, 1st overdrive, 2nd, 2nd overdrive, 3rd, 3rd overdrive, 4th, and 4th overdrive. When I am pulling a loaded car hauler up the Cajon Pass in SoCal, 3rd overdrive is my sweets spot.
I found the Gear Vendors complete with all wiring, switches, and brain in an '86 2 wheel drive Suburban behind a TH400 at an Ecology Pick a Part several years ago when the cash for clunkers incentive was going on in California. Everyone was cashing in their older rides. Got it for $100. |
02-10-2017, 12:51 AM | #20 |
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Re: Anyone using Gear Vendors Over/Under Unit?
I have one for my Javelin and the only shortcoming with it is no lock up converter with a T400. That would be the ultimate set up.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
02-10-2017, 02:55 AM | #21 | |
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Re: Anyone using Gear Vendors Over/Under Unit?
Quote:
I wouldn't have tried to squeeze it in a lifted Blazer for fear of driveline angle... but a low long wheel base truck... |
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02-10-2017, 05:50 PM | #22 |
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Location: Santa Ana, CA
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Re: Anyone using Gear Vendors Over/Under Unit?
Everyone seems to think that. But it actually fits really well with a perfect driveline angle. I had to source out a 300 series slip yoke from a Cadillac application, which combines the slip yoke and CV joint into the shortest known factory setup. I then cut the spring perches on my rear axle and rotated the axle pinion to point right at the GV output. No vibration, and plenty of play in the slip yoke for axle movement. Been this way for 7 years now. Attached are some old pics during the install.
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07-19-2020, 12:56 PM | #23 |
Just here to tinker
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Re: Anyone using Gear Vendors Over/Under Unit?
I had a gear vendors in my little '78 diesel with T400 and loved it! Made all the difference in the world being able to split gears when towing up a hill.
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