Ford Truck Enthusiasts Forums - View Single Post - Gearvender Deep Sump Installation Tutorial (Maximum Overdrive)

08-04-2013, 03:44 AM

genscripter

Cargo Master

Join Date: Oct 2012

Location: California

Posts: 3,061

Likes: 19

Received 39 Likes on 27 Posts

Gearvender Deep Sump Installation Tutorial (Maximum Overdrive)

Hi all. I thought I’d put my Deep Sump installation on the forum. It’s not a difficult installation and a perfect project for DIY’er, regardless if he/she is a novice or expert mechanic.

Why install a Deep Sump?
Installing a Deep Sump for your overdrive is good for a number of reasons. It can aid with cooling, especially if you are driving for extended periods of time, hauling large loads, or traveling at higher speeds. The greater oil capacity and cooling fins on the Deep Sump facilitates this cooling. Also, it has a drain plug, so you don't have to pull the pan to change your GVOD oil, which can be messy and/or damage the seal. Lastly, the Deep Sump has a temp probe port, so you can register the Overdrive temperature on a dash mounted gauge.

Before we begin...
First, you need a Gearvendor Overdrive. If you don't have a GVOD, then you might want to bookmark this page for when you obtain a GVOD. Just in case you don't know what that is, this is an auxiliary overdrive, that is installed at the end of the transmission's tailshaft housing. This tutorial does not cover the installation of the GVOD, and it assumed you already have a GVOD and you want to upgrade to the Deep Sump.

For this tutorial, it assumes you have a Type J or Type P GVOD. I don't know if this will work for other units, but it may. Also, this is connected to a C6 transmission, and I'd assume it will work for other transmissions, since the tailshaft housing does not conflict with the deep sump.

From my research, there are really only 2 suppliers of GVOD Deep Sumps. The company Gearvendor makes a deep sump shown in the following image:

It costs $150+shipping+tax and is moderately sized. The company Maximum Overdrive makes an aftermarket deep sump that huge that costs $140+shipping+tax. Shown here:

Ultimately, the Maximum Overdrive Deep Sump (MODS) is the better deal, but there are issues. Namely, the customer service and speed of service. Also, there are some design flaws, but they are discussed near the end of the tutorial and are negligible.

This tutorial explains the installation of the MODS on a GVOD.

Glossary:
MODS = Maximum Overdrive Deep Sump
GVOD = Gearvendor Overdrive
OD = Overdrive
MO = the company Maximum Overdrive
DS = Deep Sump

Some tools you will need:
Socket set
Torx set
Channel Lock Pliers

Parts and fluids needed:
Deep Sump
GVOD pan gasket
Gear oil resistant permatex
2 qts Gear oil (GV highly recommends Lucas 75W90 synthetic)

Preparation:
I received my MODS and there was some preparation. Here is a picture of the unit:

The Max Overdrive Deep Sump comes with some additional parts.
1.) There is an extender tube and two o-rings, which allows the oil pick-up to reach further down into the sump,
2.) A replacement pan gasket, and
3.) six 2 1/2" long 1/4" diameter x 28TPI bolts, with locking washers.

I noticed Max Overdrive bored out some of the side and insides of the casting with a mill of some sort. There were some flakes and metal shavings, so I gave the OD a few flushes of Mineral Spirits to wash out any remaining metal. It was a good idea, because there was a lot more metal on the inside of the DS than I thought. I did 3 flushes until it came up clean. You can see some of the flakes in the next image:

The MODS also comes with a pre-drilled 1/4" NPT female temp probe port next to the drain plug. If you don't want to install a temp probe, you should buy a 1/4" NPT male plug and thread it in. I already had a digital temp gauge installed on my van to give me the fuel temperature at the IP, so I bought an installed a second temp probe that was inserted into this port on the Deep Sump. I use a ON-OFF-ON toggle switch to transfer the resistance between the GOVD temp probe and the IP temp probe. (Note, I used a stainless steel bushing from McMaster Carr to fit the 1/8"NPT electronic temp prob. The bushing has 1/4" NPT outside threading and 1/8" NPT inside threading, but there was lip on the inside of the bushing that didn't permit the temp probe to fit all the way into the bushing. So, if you buy the same bushing, you will need a drill press to bore out the inside of the bushing to allow the temp probe to fully insert thru the bushing. )

Here's a picture of my temp probe installed next to the drain plug:

Continued to next post....

<!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves>false</w:TrackMoves> <w:TrackFormatting/> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w

oNotPromoteQF/> <w:LidThemeOther>EN-US</w:LidThemeOther> <w:LidThemeAsian>X-NONE</w:LidThemeAsian> <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w

ontGrowAutofit/> <w:SplitPgBreakAndParaMark/> <w:EnableOpenTypeKerning/> <w

ontFlipMirrorIndents/> <w:OverrideTableStyleHps/> </w:Compatibility> <m:mathPr> <m:mathFont m:val="Cambria Math"/> <m:brkBin m:val="before"/> <m:brkBinSub m:val="--"/> <m:smallFrac m:val="off"/> <m:dispDef/> <m:lMargin m:val="0"/> <m:rMargin m:val="0"/> <m:defJc m:val="centerGroup"/> <m:wrapIndent m:val="1440"/> <m:intLim m:val="subSup"/> <m:naryLim m:val="undOvr"/> </m:mathPr></w:WordDocument> </xml><![endif]--><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority

9; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} </style> <![endif]-->

Reply Like