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NV3550 conversion
The NV3550 is an excellent option to consider in smallblock V8 Jeep
applications. 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 1st 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
.
NV3550 / Klune-V Extreme underdrive
Rather than a granny gear 4 or 5 speed, a more
"premium" alternative to achieve extreme gearing would be an
NV3550 combined with a Klune-V
Extreme Underdrive.
NV3550 conversion Details
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
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.
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 bolt
together.
Atlas II Transfer Case - This case is
available in configurations for direct bolt up, and is a definite
upgrade option over stock units.
Klune-V Extreme Underdrive
- This unit is a premium option where extreme offroad gearing options
are desired. The unit fits between the transmission and transfer case.
The Klune can then be coupled to a transfer case such as the Dana 18
or Dana 20, or perhaps an Atlas. Due to the additional length when adding this unit, there are various
issues that must be addressed to ensure proper driveshaft operation.
Overall engine length, engine placement, transmission length and transfer
case length must be considered. All this must fit behind the radiator
and sufficiently i front of the ear axle to allow minimum driveshaft
length. We have found that proper driveline geometry is allowed for, drive shafts
as short as 11" will work well. Link: Discussion
on driveshaft geometry issues. Please call us if you are considering
such a system and have concerns not covered in the website.
Package:
*NOTE: The prices below are PACKAGE prices: The prices for the
installation kit parts will be 10-20% higher when purchased separately
(We can also provide custom packages where needed)
| # |
NV3550
in Jeep w/ GM SB motor |
Priced
Separately |
Pkg Pricing
Total* $2,733.70 |
| 1 |
NV3550 Jeep 5spd 4WD Transmission |
$1,750.00 |
$1,656.25 |
|
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. |
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Adapter /
Installation kit - This kit supplies a
complete new bellhousing and external slave cylinder and hose
kit |
|
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| 1 |
Bellhousing and
pilot bearing kit (this BH is limited to the smaller 153 tooth
GM Flywheel, unless high torque starter listed below is used) |
$335.42 |
$335.42 |
| 1 |
Slave cylinder |
$62.50 |
$62.50 |
| 1 |
Hydraulic Hose
(to adapt new slave cyl to stock YJ Wrangler master cyl) |
$40.63 |
$40.63 |
| 1 |
Hydraulic Hose
adapter (to adapt new slave cyl to "Iron Duke" style
CJ master cylinder) |
$9.37 |
$9.37 |
|
Adapting to the
transfer case:
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|
| 1 |
NV3550 to Dana
18/20 adapter |
$345.28 |
$345.28 |
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Clutch
components: A stock GM pressure plate
and throwout bearing may work. The high-top PP in conjunction
with the N1714 T/O bearing listed are known to work with the
slave cylinder being used. It is also recommended you replace the clutch components unless they
are known to be fresh |
|
|
| 1 |
Throwout bearing |
$34.31 |
$34.31 |
| 1 |
Pressure
Plate |
$167.89 |
$167.89 |
| 1 |
Clutch Disc |
$82.04 |
$82.04 |
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Items you may need if you do not have the Correct flywheel for this conversion
(The BH supplied in this kit is limited to the smaller 153 tooth GM Flywheel, unless high torque starter listed below is used |
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Flywheel:
153T GM Smallblock (must specify year and size of motor
for correct balance) |
$242.50 |
$0.00 |
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High Torque
Starter (Using this starter with NV3550 BH to GM engine will
allow use of 168T FW) |
$235.00 |
$0.00 |
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Slave cyl spacer
kit - needed to fit high torque starter w 168T FW with this BH. |
NC |
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