NV3550 5 Speed Conversion into a CJ with AMC Engine

PACKAGE PRICING BELOW

NV3550 Conversion

The NV3550 is an excellent option to consider in AMC V8 and Inline 6 Jeep applications. (We may be able to figure out how to do a 4cyl app too, give us a call – have to think about it) It will comfortably handle a mild V8 in a vehicle such a as a Jeep, and will fit under the body in a Jeep with very few additional modifications.

NV4500 Conversion

There is one other popular 5 speed option for the Jeep CJ: The NV4500. This trans is way-oversize for the application, and requires a body lift or extensive floor pan modification to fit. The usual incentive for this conversion is to get the truck style wide ratio, almost granny 1^st gear which can be useful for offroad use. On the other hand, this conversion will make a your jeep drive more like a  truck. If this looks like the option or you, High impact does have available a package using the NV4500. Call or email us for a quote.

Conversion Package

High Impact has available a package providing you with all the primary essential ingredients to this installation. The NV3550 will fit under the stock body without a body lift. Only minor floor pan mods are needed where the shifter handle comes up.

Adapting To The Transfer Case

Dana 300 – The Dana 300 was the standard transfer case supplied in CJ jeeps 1980-up. Note that the NV3550 tail is drilled to fit NV231. D300 will fit, however will be rotated down approximately 9 deg: To correct this, the NV3550 tailhousing will need to have 6 holes re-drilled. If desired, a rotation adapter plate kit s available to make this a direct bolt together.

Jeep Dana 18 and Dana 20

Most Dana 18 or Dana 20 transfer cases can be bolted to the NV3550 through the use of a standard adapter (listed below in the kit detail)

The notable exceptions are:

1969 – 1971 Jeeps with the T14 transmission used a 10 spline shaft. In this case, it is necessary to replace the original 10 spline input gear with the equivalent gear-tooth-count 6 spline version.

The 70’s Jeeps with Turbo 400 automatics had a 32 spline output shaft and used a spud shaft in an adapter housing. The T-case input gear is carried on the spud shaft. This gear is not compatible with the six spline version: You must replace this input gear with the equivalent gear-tooth-count 6 spline version.

Scout versions used with an automatic transmission: This gear will have a 23 spline configuration. It must be replaced with the Scout gear from the manual trans applications, which will have the correct 6 spline configuration.

Atlas II Transfer Case – This case is available in configurations for direct bolt up, and is a definite upgrade option over stock units.

Package:

Parts can be purchased separately also.

NV3550 in Jeep w/ AMC motor/D20/D300 Tcase Pkg Price $2,181.30 (FULL Bellhousing Method) 1 Rebuilt NV3550 Jeep 5 spd 4WD Transmission. Comes with a two year, 24,000 mile warranty.  Included Shift Handle: You will need to modify your existing shifter by cutting off the current end, and welding on a steel plate and drilling holes thru the steel plate to bolt up to the stub sticking out of the trans. Adapter / Installation kit – This kit supplies a complete new bellhousing and external slave cylinder and hose kit 1 Bellhousing and pilot bearing kit  Included 1 Tcase shifter bracket/linkage  Included 1 Crossmember adapter plate  Included Adapting to the transfer case: You will need to select the needed adapter components below; the package porice is given. It will need to be added to the package total NV3550 to Dana 18/20 adapter $345.28 $0.00 NV3550 to Dana 300: The Dana 300 will bolt up, however the bolt pattern rotation in the NV3550 will likely cause the D300 to hang excessively low. This can be corrected by using a gasket as a template and re-drilling the pattern in the adapter of the NV3550. If preferred a bolt on rotation adapter is available: Option: Dana 300 Rotation Adapter kit. (3/4″ thick) $172.65 $0.00 NV3550 to NP231 – In most cases a Jeep NP231 case will bolt up directly. The exception: A 231 from behind the 87-88 Peugeot 5sped and a 231 from a 2.5L 4cyl app will have a 21 spline input. This gear will need to be changed to the 23 spl part. (NP231) Tcase shifter bracket/linkage $29.60 $0.00 NP231 input gear, 23 spline, 1987-94 $190.00 $0.00 NP231 input gear, 23 spline, 1995-up $190.00 $0.00 NV3550 to NP207 – The NP207 was used in some Jeeps 1987-88. Most will bolt up directly, however some will have a 21 spl input gear. In this case, the input gear must be replaced with the 23 spl part. $190.00 $0.00 Clutch components: Your stock pressure plate likely will work. The stock clutch disc usually will not work. It is recommended you replace these unless they are known to be fresh Throwout bearing $33.00 Pressure Plate $155.64 Clutch Disc $82.00 Slave cylinder & Hose kit $140.63 Master cyl $80.00