Banks Power GM Motorhomes: (Gas ’82 - 95 7.4L) PowerPack system (EFI TBI, P30 chassis) - Manual (Page 13)

variety of coach body configurations, and therefore differ-
ent vehicle weights, some experimentation will most likely
have to be done to obtain the desired shift points.
Three different governor springs are provided in the Banks
PowerPack. These springs are all lighter in tension than the fac-
tory springs, and are color coded orange, yellow, and green,
from the lightest to the heaviest respectively. A good starting
point for many vehicles is an orange-yellow combination.
If the vehicle has been recently driven, allow the trans-
mission to cool before disassembling the governor, as
hot transmission fluid can cause serious burns.
Place a drain pan under t he governor cover,
located at the rear of the transmission on the right
hand side. Remove the four bolts attaching the governor
cover and remove cover from transmission. It is normal for
some fluid to be lost.
Remove the governor assembly by pulling it out and
twisting it slightly counter clockwise. Keep the
governor assembly as clean as possible while working on
it. See Figure 15.
Using a small screwdriver or needle-nose pliers,
s l i g h t l y c o m p re s s t h e t wo s p r i n g s u n d e r t h e
governor flyweights, and remove them from the governor
assembly. See Figure 16.
Select the desired pair of springs from those provided
in the PowerPack kit. Install this pair of springs in the
governor assembly. Make sure the ends of the springs pop
over the raised buttons in the governor assembly.It does not
matter which springs goes on which side.
R e - i n s t a l l t h e g ov e r n o r a s s e m b l y i n t o t h e
transmission case. Use the new gasket supplied
when reinstalling the cover. Tighten the cover bolts to
approximately 15 ft.-lbs.
R e p l a c e a ny t r a n s m i s s i o n f l u i d l o s t d u r i n g
disassembly.
Reconnect the battery cables. Start engine and
listen for any exhaust leaks. Tighten bolts or clamps
to correct leaks as required. Allow engine to warm up and
test drive vehicle. NOTE: Exhuast tubing will smoke for the
first 15-20 minutes of operation. This is normal as grease
used in the bending process will burn off the pipes.
Check the transmission fluid level per instructions in owners
manual, and adjust level as required.
TUNE-UP INFORMATION:
Test drive the vehicle. On a clear section of highway,
accelerate at full throttle and note your shift points. In most
applications, your 1-2 shift should occur at 32-34 mph.
(3900-4100 RPM), and the 2-3 shift at 55-57 mph. (4000-
4100 RPM). If your coach has a tachometer, go by the
tachometer reading.
It will probably take several tries to find the right combina-
tion of governor springs to achieve these shift points.
Remember, lighter springs will raise the shift points, while
heavier springs will lower them. Keep track of your testing
changes. TUNE-UP INFORMATION: Follow all factory
tune-up specifications. No special tune-up procedures are
required with the Banks PowerPack.
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13 P.N. 96354
FIGURE 15
FIGURE 16