Need Gear Vendors OD Dimensions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SCOTI · 02-08-2016, 01:35 PM

I know there were a couple of the Squarebody group that had GV OD units in their trucks. I looked on their website but don't see the dimensions to get an idea if one of these units will fit under my truck w/o a domino effect. They list the tailhousing assembly circled in yellow @ 12.25" (TH400/mech speedo app) but don't list the dimensions of the other section circled in red.

This could possible interfere w/my exhaust crossover and/or exhaust flanges. Does any have the length for the adapter portion in red?

monte0185 · 02-08-2016, 03:14 PM

Wish I still had that dually Id gladly measure it for ya. Sold it and bought a 91 crew with the 4l80.

KQQL IT · 02-08-2016, 04:38 PM

18-3/8

SCOTI · 02-08-2016, 04:48 PM

Quote:

Originally Posted by KQQL IT

18-3/8

Wow..... That adds significanly to the overall length.

KQQL IT · 02-08-2016, 05:04 PM

A friend has a new one and about to install it, that was from the adapter to the rear seal.

68Timber · 02-08-2016, 05:10 PM

So that's those two pieces combined, and it replaces the 4" tailshaft?

SCOTI · 02-08-2016, 05:54 PM

Quote:

Originally Posted by KQQL IT

A friend has a new one and about to install it, that was from the adapter to the rear seal.

Would it be possible to snag a pic of the assembled unit if you're able?

Firebirdjones · 02-08-2016, 06:57 PM

Quote:

Originally Posted by 68Timber

So that's those two pieces combined, and it replaces the 4" tailshaft?

yes, the 2 pieces combined are a little over 18 inches, and it replaces the original tail shaft.

On the ones I've installed, shortening the driveshaft is a must, and sometimes changing the exhaust around if you have an X pipe. Sometimes floor mods are needed in some cars as the tunnel gets a little tight back there on some models.

KQQL IT · 02-08-2016, 07:43 PM

Quote:

Originally Posted by SCOTI

Would it be possible to snag a pic of the assembled unit if you're able?

This weekend, his wife didn't appreciate the new parts in the kitchen...

tucsonjwt · 02-08-2016, 08:30 PM

My 83 C20 has a GV unit but I have a SM465 granny so the adapter is different. Driveshaft must be shortened and rebalanced - that balancing is critical or you will get a bad vibration.

SCOTI · 02-08-2016, 09:35 PM

I knew the driveshaft had to be cut & re-balanced. It was the closer inspection of the length that surprised me. Might re-think the 4l80e....

Edahall · 02-08-2016, 10:22 PM

Here are some photos of the GV unit on my Suburban.

345HP87SSAC · 02-08-2016, 10:32 PM

So is the GV unit eorth it or should an owner switch to a 4l80?

Edahall · 02-08-2016, 10:57 PM

Quote:

Originally Posted by 345HP87SSAC

So is the GV unit eorth it or should an owner switch to a 4l80?

And there is also the option of using a 4L80E and GV so you get double overdrive. With the double overdrive setup on my vehicle, the RPM's at 60 mph is 1250 RPM's. The engine is barely off an idle at that speed.

345HP87SSAC · 02-08-2016, 11:06 PM

Cant decide what way to go wit my 89.

KQQL IT · 02-09-2016, 12:47 AM

Quote:

Originally Posted by SCOTI

I knew the driveshaft had to be cut & re-balanced. It was the closer inspection of the length that surprised me. Might re-think the 4l80e....

More pics....

SCOTI · 02-09-2016, 01:06 AM

Visually, that has more bulk to it vs what I saw from the dimensions pic on their website. What is your buddy's specific app? Mine is a th400/mechanical speedo so I wonder if that's part of it?

Edahall · 02-09-2016, 01:18 AM

The unit is not bulky. However, the length combined with the NV5600 transmission and NP205 transfer case creates quite a short drive line.

KQQL IT · 02-09-2016, 01:29 AM

Quote:

Originally Posted by SCOTI

Visually, that has more bulk to it vs what I saw from the dimensions pic on their website. What is your buddy's specific app? Mine is a th400/mechanical speedo so I wonder if that's part of it?

Tbi 7.4 TH400 ext cab dually

KQQL IT · 02-09-2016, 01:37 AM

Used to be a guy in town, 55 chevy 502 bbc TH400 and GV overdrive ran mid 11's did 1-2-2 over-3 over at the track.
Seemed tough enough and fit.

SCOTI · 02-09-2016, 10:46 AM

Quote:

Originally Posted by KQQL IT

Tbi 7.4 TH400 ext cab dually

Will he be shifting the trans x-member back? it's difficult to visualize if the mount is affected. I recall it being part of the case vs the tail housing but need to crawl under mine to confirm.

Firebirdjones · 02-09-2016, 11:07 AM

Quote:

Originally Posted by KQQL IT

Used to be a guy in town, 55 chevy 502 bbc TH400 and GV overdrive ran mid 11's did 1-2-2 over-3 over at the track.
Seemed tough enough and fit.

Definitely tough enough, they are rated to about 2,000 hp. It's what most of the drag week guys with auto's use that race down into the 7 second zone at over 200 mph and then drive the car between tracks.

SCOTI · 02-09-2016, 11:59 AM

Quote:

Originally Posted by Edahall

The unit is not bulky. However, the length combined with the NV5600 transmission and NP205 transfer case creates quite a short drive line.

I was referring to the additional bulk not within the OD of the tube/can structure. My flanged exhaust cross-over tube is approx 3" below/6" behind my drive shaft where it exits the trans. The additional mass circled looks like it would definitely interfere.

But, I didn't notice this mass in the website pics.....

KQQL IT · 02-09-2016, 07:24 PM

I believe they have 2 different pans as well.

tucsonjwt · 02-09-2016, 10:12 PM

If you read the GV website you will find that they say adding a GV to an overdrive transmission will not increase fuel economy, just create a better towing experience.

02-08-2016, 01:35 PM	#1
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,939	Need Gear Vendors OD Dimensions I know there were a couple of the Squarebody group that had GV OD units in their trucks. I looked on their website but don't see the dimensions to get an idea if one of these units will fit under my truck w/o a domino effect. They list the tailhousing assembly circled in yellow @ 12.25" (TH400/mech speedo app) but don't list the dimensions of the other section circled in red. This could possible interfere w/my exhaust crossover and/or exhaust flanges. Does any have the length for the adapter portion in red? Attached Images __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

02-08-2016, 03:14 PM	#2
monte0185 Registered User Join Date: Oct 2008 Location: Brighton, TN Posts: 1,267	Re: Need Gear Vendors OD Dimensions Wish I still had that dually Id gladly measure it for ya. Sold it and bought a 91 crew with the 4l80. __________________ A computer once beat me at chess, but it was no match for me at kick boxing. Duct tape is like the force. It has a light side, a dark side, and it holds the world together.

02-08-2016, 04:38 PM	#3
KQQL IT At the body shop. Join Date: Aug 2009 Location: Land of fruits and nuts. Posts: 5,192	Re: Need Gear Vendors OD Dimensions 18-3/8 __________________ " That didnt make it any newer " " Dont antique the equipment "

02-08-2016, 05:04 PM	#5
KQQL IT At the body shop. Join Date: Aug 2009 Location: Land of fruits and nuts. Posts: 5,192	Re: Need Gear Vendors OD Dimensions A friend has a new one and about to install it, that was from the adapter to the rear seal. __________________ " That didnt make it any newer " " Dont antique the equipment "

02-08-2016, 05:10 PM	#6
68Timber I know the pieces fit Join Date: Nov 2007 Location: MONTGOMERY, AL Posts: 5,523	Re: Need Gear Vendors OD Dimensions So that's those two pieces combined, and it replaces the 4" tailshaft? __________________ John 79 2wd Blazer (Bruiser) 85 M1009 Blazer (Sarge) build 74 Honda Z50 build

02-08-2016, 08:30 PM	#10
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,188	Re: Need Gear Vendors OD Dimensions My 83 C20 has a GV unit but I have a SM465 granny so the adapter is different. Driveshaft must be shortened and rebalanced - that balancing is critical or you will get a bad vibration.

02-08-2016, 09:35 PM	#11
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,939	Re: Need Gear Vendors OD Dimensions I knew the driveshaft had to be cut & re-balanced. It was the closer inspection of the length that surprised me. Might re-think the 4l80e.... __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

02-08-2016, 10:22 PM	#12
Edahall Registered User Join Date: May 2011 Location: Goliad, TX Posts: 672	Re: Need Gear Vendors OD Dimensions Here are some photos of the GV unit on my Suburban. __________________ 1990 ¾ ton 4x4 Chevy Suburban -Cummins Diesel - 12 valve - factory rebuilt -6 speed bullet proof manual transmission - NV5600 -Gear Vendors Overdrive - HX35 Holset Turbo -NP205 iron transfer case -3.73 gears -2" Lift

02-08-2016, 10:32 PM	#13
345HP87SSAC Registered User Join Date: Jul 2010 Location: Stanberry, Missouri Posts: 223	Re: Need Gear Vendors OD Dimensions So is the GV unit eorth it or should an owner switch to a 4l80?

02-08-2016, 11:06 PM	#15
345HP87SSAC Registered User Join Date: Jul 2010 Location: Stanberry, Missouri Posts: 223	Re: Need Gear Vendors OD Dimensions Cant decide what way to go wit my 89.

02-09-2016, 01:06 AM	#17
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,939	Re: Need Gear Vendors OD Dimensions Visually, that has more bulk to it vs what I saw from the dimensions pic on their website. What is your buddy's specific app? Mine is a th400/mechanical speedo so I wonder if that's part of it? __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

02-09-2016, 01:18 AM	#18
Edahall Registered User Join Date: May 2011 Location: Goliad, TX Posts: 672	Re: Need Gear Vendors OD Dimensions The unit is not bulky. However, the length combined with the NV5600 transmission and NP205 transfer case creates quite a short drive line. __________________ 1990 ¾ ton 4x4 Chevy Suburban -Cummins Diesel - 12 valve - factory rebuilt -6 speed bullet proof manual transmission - NV5600 -Gear Vendors Overdrive - HX35 Holset Turbo -NP205 iron transfer case -3.73 gears -2" Lift

02-09-2016, 01:37 AM	#20
KQQL IT At the body shop. Join Date: Aug 2009 Location: Land of fruits and nuts. Posts: 5,192	Re: Need Gear Vendors OD Dimensions Used to be a guy in town, 55 chevy 502 bbc TH400 and GV overdrive ran mid 11's did 1-2-2 over-3 over at the track. Seemed tough enough and fit. __________________ " That didnt make it any newer " " Dont antique the equipment "

02-09-2016, 07:24 PM	#24
KQQL IT At the body shop. Join Date: Aug 2009 Location: Land of fruits and nuts. Posts: 5,192	Re: Need Gear Vendors OD Dimensions I believe they have 2 different pans as well. __________________ " That didnt make it any newer " " Dont antique the equipment "

02-09-2016, 10:12 PM	#25
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,188	Re: Need Gear Vendors OD Dimensions If you read the GV website you will find that they say adding a GV to an overdrive transmission will not increase fuel economy, just create a better towing experience.



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