4.8 Turbo: Th400 trans question?
10-16-2012, 03:49 PM
#1
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4.8 Turbo: Th400 trans question? Just curious im in the process of installing my 4.8 turbo. I would like to use a th400 for the trans.. my question is the trans is vacuum controlled right? what should i do im running a turbo..wont it boost the trans? do i need a check valve or something. thanks for helping guys
10-16-2012, 04:30 PM
#3
Yes,
It is vacuum controlled if using a automatic shift valve body. You can use a check/relief valve in the circuit. I stock them. In big boost applications, sometimes 2 reliefs are good.
It is vacuum controlled if using a automatic shift valve body. You can use a check/relief valve in the circuit. I stock them. In big boost applications, sometimes 2 reliefs are good.
10-16-2012, 09:39 PM
#5
When it is on boost it will go to full line pressure, boost will bleed off at the check reliefs, and shift slightly later.
We have quite a bit of experience with boosted applications using TH400's and 4L80E's.
Look up fullblown03 on Youtube, he is running one of our TH400's in a turbo'd 03 Cobra, knocking on the door to running 7's in the 1/4 mile. We're going to freshen it this winter and do some lightening of parts and more mods to go faster.
We have quite a bit of experience with boosted applications using TH400's and 4L80E's.
Look up fullblown03 on Youtube, he is running one of our TH400's in a turbo'd 03 Cobra, knocking on the door to running 7's in the 1/4 mile. We're going to freshen it this winter and do some lightening of parts and more mods to go faster.
