| Early Broncos 66-77 came with a 3 speed
manual trans, column shifted. A C4 3 speed automatic also became
available 73-77.
(If you are wanting to add overdrive, however prefer to use an
automatic, we offer packages to use the Ford
AOD transmission and the GM 700R4)
If you prefer a stick transmission, and want a 5 speed, The choices
are Ford ZF 5 speed, NV4500
5 speed and NV3550 5 speed. The ZF 5 speed is available to bolt in
behind the Ford 302 or 351 Windsor, and we carry an adapter to mate
this to the Bronco 20 case. The Dodge NV4500 is generally considered a
better transmission than the ZF. We also carry a package developed to
install this transmission in the Early Bronco. Both of these transmissions
are truck type trannies. They have deep 1st gears which are useful in
hard core offroad. An they also shift like a truck
The NV3550 trans is a medium duty trans originally developed for use in Jeeps.
It will comfortably handle the power of a medium power V8. They shift
smoothly with a light feel. The weight of this unit is 97 lbs. Size
and weight, it is a likely replacement for the stock trans. All in all,
a very good candidate for a transmission upgrade in an Early Bronco. A
Conversion to the NV3550 might be just what the doctor
ordered.
We Can supply the NV3550. We have also put together a package of
the key items needed to make this upgrade.
Conversion Package
*NOTE: The prices below are PACKAGE prices: The prices for the
installation kit parts will be 10-20% higher when purchased separately
The package is designed to work in conjunction with the stock
Ford flywheel, bellhousing and clutch linkage.
(We can also provide custom packages where needed)
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Priced separately |
Package Price |
|
NV3550
into 66-77 Bronco w Stick trans |
$2425.81
|
$2,349.09* |
| 1 |
NV3550 Jeep 5spd 4WD Transmission |
$1,750.00 |
$1,656.25 |
| 1 |
Shift Handle |
$30.86 |
incl
|
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Shift Handle: You will need to modify this 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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| 1 |
NV3550/ Bronco
Dana 20 adapter kit |
$434.70 |
incl
|
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Installation
kit: This kit is designed to work with a standard Ford
car/truck-type BH with a 4.848 index dia. The transmission has a
different dia input shaft, thus the clutch disc will need to be
changed. It is always recommended to use a fresh throwout
bearing, and it is a good idea to replace the pressure plate
unless you know it is fresh |
|
| 1 |
Ford BH adapter
kit, incl new clutch disc |
$248.40 |
incl |
| 1 |
Crossmember &
Trans mount kit NV3550 / E Bronco |
$161.46 |
incl |
|
Optional
|
|
|
|
Throwout bearing |
$36.56 |
$36.56
|
|
Pressure
Plate |
$164.22 |
$164.22
|
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Also
Needed for conversion from automatic: |
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Flywheel |
$250.00 |
|
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Dust shield/engine plate |
$65.00 |
|
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Ford Bellhousing |
$250.00 |
|
|
Fork |
$22.00 |
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Clutch
pedal/linkage [Junkyard or Bronco specialty shop item] |
N/A
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If you are
converting from an Automatic these parts will be needed
Clutch
Your stock pressure plate and Throw-out bearing will work, however should be replaced
if not known to be fresh. We can also supply these parts as a part of
your package (Package pricing tends to be better than prices for items
purchased separately)
Transfer Case
The Early Bronco came with a version of the Dana 20 that was
specific to the Early bronco: It has a front driveshaft on the driver
side. The package is available with the necessary adapter to
retain this stock transfer case
Other options include an Atlas
Transfer Case, A
Klune-V
Extreme Underdrive with the Stock Tcase, and other
options
Crossmember
The stock crossmember will not work. We offer a replacement
crossmember as a part of the package
Driveshafts
The NV3550 with the necessary adapters installed is 26" long
from rear of bellhousing to front of the stock Tcase. You may measure
your current transmission and adapter combo and compare these numbers
to determine if driveshaft modification will be necessary.
Deeper Gearing Options:
NV4500 Conversion
There is one other popular replacement option for
the AX5: 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 4 cyl jeep drive more like a dump truck. If this looks like the
option or you, High impact does have
available a package using the NV4500
replacing the AX5.
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.
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