High Impact Transmission and Gear

We focus on building "Engineered Conversion Systems" for do-it-yourself installation. Free Consultation & Technical Support is always available to our customers.

A Guide to 4WD gearing by Greg Miller

This article discusses the various different options available to achieve optimal 4WD gearing.

Catalog by_Product Catalog by_Vehicle



High Impact Products
	NV4500 5sp Transmissions & Conversions
	New NV4500s, 6.34 or 5.61 first gear, custom or stock configurations
	NV3550 5sp Transmissions & Conversions
	NV3550 medium Duty 5 speeds: Into 4 and 6 cyl, Jeeps, Broncos, V8 Apps
	Ford ZF 5 and 6 Speed Transmissions
	Update older Fords or convert automatic to stick
	High Impact "Bad Boy" Auto Transmissions
	Our specialty automatic trans line for conversions & upgrades
	*Klune-V Extreme Underdrive Systems*
	Adding extra gears and gear ranges to a vehicle...
	*Atlas II Transfer Cases*
	Hard Core 4x4 aftermarket Tcase upgrade
	"Granny Tranny" Conversion Systems
	Wide ratio manual trans conversions get deeper crawl gearing for extreme offroad use
	Automatic Transmissions & Conversions
	Factory stock or High Impact "Bad Boy" custom configurations
	Stick Transmissions & Conversions
	Factory stock or custom configurations
	Transfer Cases
	Factory stock or custom modified
	Dual Transfer Case Systems
	Including Marlin Crawler & "Doubler" systems
	Overdrive Conversions
	adding overdrive for improved highway driving and fuel mileage
	Gear Splitter Systems & applications
	Gear Splitting & Overdrive for improved mountain towing performance


	Contact High Impact

Gearing Options by Vehicle Type
	Jeep Wrangler 87 to present
	Early Bronco 66-77
	Ford Full-size trucks
	GM Full-size trucks
	Toyota Land Cruiser
	(More "by vehicle" listings to come)

Catalog