Looking for crisper shifts and better performance from your
automatic transmission? Our valve body upgrade is the answer.
This unit will increase the power handling ability of the
transmission as well as firm up the shifts and improve performance.
Shifts 1-2, 2-3 and 3-4 are substantially improved. Our extensive
modifications include upgrading springs, revalving and machining
the stock unit. Better performance than any other unit!
PLEASE NOTE: THERE IS NO CORE PROGRAM. This
upgrade is performed on the valve body already inside your
transmission. You must remove your valve body and send it to us for
Once you have purchased our Valve Body Upgrade we will send you
(via your choice of shipping method) an empty box. This will
contain instructions on removing the valve body and adequate
packing materials for shipping.
It is very important that you package the valve body carefully.
Once we receive the valve body, we will have the valve body upgrade
finished within 2 days of receiving it and will send the completed
unit back to you (via your choice of shipping method) for
installation. Please contact us with any questions.
The slightest damage can render the valve body and the
transmission unusable. As replacement valve bodies are unavailable,
we insure (as you should when sending the unit in) each valve body
shipment for the cost of an installed replacement transmission and
limited rental car use.
NOTE: You MUST use Nissan's specialty
transmission fluid for this transmission. Any other fluid will
WARRANTY NOTE: As STILLEN has no knowledge of the condition,
functionality or performance of the valve body or transmission when
the valve body is sent to STILLEN and as the modifications that are
performed are strictly physical in nature (opening fluid transfer
ports and changing springs); STILLEN cannot accept responsibility
for the performance of the valve body or transmission after the
upgrade is performed. There is NO WARRANTY for the valve body or
transmission by STILLEN after the valve body is upgraded except for
physical damage to the valve body itself while in the possession of