NV4500 Conversion Package
GM 82-93 6.2L Diesel Engine
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Apps by Vehicle Type
NV4500 Applications
NV4500 10 speed system
GM 92-01 6.5L Diesel
GM 82-93 6.2L Diesel
Ford 7.3 Diesel - Auto Trans rplmt
Ford 7.3 Diesel - replacing a ZF 5spd
Ford 7.3 Diesel - replacing 4 speed
Ford 6.9 Diesel - Replacing an automatic
Ford 6.9 Diesel - Replacing a 4speed
Dodge 5.9 Diesel - Getrag rplmt
Dodge 5.9 Diesel 88-up auto trans rplmt
NV4500 Diesel Applications
Dual Mass vs Solid FW
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Customer Service: When you buy a package from High Impact, free tech support is available from a QUALIFIED engineer for any questions or issues you may have both during and after your install. An engineer will go over the details of your system with you at the time of purchase to go over options, and verify the exact engineering and parts included in your kit is correct for your application
| GM Pickup 82-93 with 6.2L Diesel / manual trans | Purchased Separately | Package Pricing |
| (Uses late model Internal slave cylinder method, 5.6 ratio trans) Kit Includes: | *** | $2,664.45 |
| New GM NV4500 Transmission | $2275.00 |
Incl |
| Shifter Handle | $47.81 | Incl |
| Rubber and steel NV4500 trans mount | $53.13 | Incl |
| GM NV4500 Diesel Bellhousing - internal slave style | $274.11 | Incl |
| Gal "SynTorque" Lubricant (req for NV4500) | $57.68 | Incl |
| Additional
adapter required ONLY on 1 Ton 4WD GM trucks 82-85
Adapter: NP205 (8 bolt 10 spline) |
$478.13 | $430.32 |
|
Automatic Trans Conversions will also need these parts. They are available at package pricing when purchasing a package |
Purchased Separately | Package Pricing |
| Flywheel
Article: Dual Mass vs Solid FW |
$278.00 | $250.20 |
| Clutch Kit (includes pressure plate, clutch disc, pilot bushing) | $229.35 | $206.42 |
| (Internal) Slave cyl | $114.16 | $102.74 |
| Master cyl | $78.73 | $70.86 |
| Hydraulic hose (for internal slave) | $66.72 | $60.05 |
Installation & Application Notes:
When upgrading a manual transmission
When Replacing an Automatic Transmission
When upgrading a manual transmission
The above system is designed to replace an existing stick transmission with an NV4500 5 speed. All of the required major components not normally existing in your truck are supplied for this conversion.
Clutch Kit
An optional item. Your GM stock clutch components will work, however it is recommended to replace these items and have your flywheel unless known to be FRESH.
4WD
The (Brand New) NV4500 transmission can be supplied in 4WD configuration, for use with GM style transfer cases 1986 and up. Adapters for other transfer cases are available, contact High Impact
2WD
The (Brand New) NV4500 are standard supplied with a fixed output yoke, and are equipped for GM electronic speedo drive. These transmissions can also be supplied with a slip-yoke rear output, and Dodge type mechanical speedo provisions if desired
Drive Shafts
You will need to have your driveshaft(s) modified for length. A local driveshaft shop is usually available to do this. If necessary, we can do it, however it is better to install the unit FIRST, then measure and build/modify driveshafts
Crossmember
You may need to relocate your crossmember, this can usually be done by re-drilling the frame and bolting into the desired location. You will need to drill the crossmember for the bolts to the larger NV4500 transmission mount
Stick Shift
The NV4500 shifter comes up about 5" to the rear of where a GM SM465 or 420 4speed does. It will be necessary to cut a hole in your floorboard to accommodate the stick shift. A simple boot can be mounted over the new hole to dress this. A simple piece of sheet metal can be cut and screwed in place to cover the old hole. It is useful to seal this doen using silicone sealant.
When Replacing an Automatic Transmission:
The basic package above, plus the parts listed below that for automatic trans replacement, form a system is designed to replace an automatic transmission with an NV4500 5 speed. All of the major components are supplied for this conversion, with the exception of the clutch pedal assembly. If desired we can source these parts from a dealer, however most likely at a higher cost than you can buy them direct from the dealer.
4WD
The (Brand New) NV4500 transmission can be supplied in 4WD configuration, for use with all GM style transfer cases 1986 and up. Adapters for other transfer cases are available, contact High Impact
GM 1 Ton Trucks 1982-85 typically used an NP205 cast iron transfer case, with an 8 bolt pattern to bolt to the trans adapter. These vehicles will require the additional adapter listed above.
2WD
The (Brand New) NV4500 are standard supplied with a fixed output yoke, and are equipped for GM electronic speedo drive. These transmissions can also be supplied with a slip-yoke rear output, and Dodge type mechanical speedo provisions if desired
Clutch Pedal assembly
These parts are available from the dealer. You will want the stock bracket, pedals and linkage components from your same-year stick-equipped vehicle. The master cylinder we supply will fit this assembly.
Drive Shafts
You will need to have your driveshafts modified for length. A local driveshaft shop is usually available to do this. If necessary, we can do it, however it is better to install the unit FIRST, then measure and build/modify driveshafts
Crossmember
You may need to relocate your crossmember, this can usually be done by re-drilling the frame and bolting into the desired location. You will need to drill the crossmember for the bolts to the larger NV4500 transmission mount
Stick Shift
It will be necessary to cut a hole in your floorboard to accommodate the stick shift. A simple boot can be mounted over the hole to dress this.