The valve body
is considered the nervous system of the transmission; the
valve body is responsible for converting the electrical signals
from the TCM into hydraulic actions. The 68-RFE uses a non-synchronous,
clutch-to-clutch design. This means that the shifts from gear
to gear must be timed perfectly thereby releasing and applying
a friction clutch to achieve an flawless shift. Because of
the sensitivity of the hydraulic circuits, we heavily modified
many areas of the valve body. Hydraulic oil flow is ported
to certain clutch packs where additional pressure is needed.
The accumulator piston seals have been redesigned to ensure
hydraulic pressure integrity. The accumulator plate is made
of high-grade material to compensate for the additional pressure
that the accumulator pistons and springs exert during heavy
Also, the ATS 68-RFE
valve body can be installed in a stock transmission for increased
transmission capacity. When our performance valve body is
installed in a good stock transmission you can expect the
transmission to hold on average an additional 100+HP. When
the valve body is installed with the addition of the ATS Co-Pilot
transmission controller your stock transmission will hold
power levels of 200HP over stock.
our performance valve body does vs our Co-Pilot does can be
confusing so this is a brief description. The valve body allows
for increased pressure to the clutch packs which provides
for higher transmission power capacity. That being said the
valve body must be commanded by the TCM to be able to produce
the higher line pressure. The TCM presents a problem, the
TCM does not have the ability to command the line pressure
that the transmission needs to be able to hold the higher
HP levels. If the Co-Pilot is installed on a stock valve body
then the stock valve body does not have the ability to produce
or handle the higher line pressure that is being commanded.
Because of these two issues you only get partial line pressure
gains when only the performance valve body or the Co-Pilot
is installed separately.
Because of the
complexity of the 68-RFE electrical and hydraulic system in
order to get the full effect of the valve body the Co-Pilot
should be installed in addition to the valve body.