m1008 6.2 into a 1985 K5 blazer gasser

[Jimmard]

The vacuum switch your looking for is mounted to the side of the IP in the same place that the throttle position switch for disengaging the torque converter lockup is at on the 700R4 version. It is on the left side of the IP looking at the motor from the front, towards the back of the vehicle. However, I have yet to find a used vacuum switch that is functional. They are about $120 new at the dealer and available as of a year ago when I switched my truck over from a 700R4 to a TH400.

Shipping a used torque converter is going to be a PITA. You need to get all of the fluid out of it or the post office won't be happy with it leaking.

Do I need the pump to run anything in my car that runs off of vacuum?

 

[kennyw]

Do I need the pump to run anything in my car that runs off of vacuum?

I would say yes, if you have AC or cruise control. But the pump is separate from the vacuum switch he is talking about.

 

[Jimmard]

I would say yes, if you have AC or cruise control. But the pump is separate from the vacuum switch he is talking about.

Oh ok, so all he needs is the switch. If that's the case, then cool

 

[kennyw]

Oh ok, so all he needs is the switch. If that's the case, then cool

Yes, the switch only operates the the vacuum modulator on the TH400.

 

[Metalhead47]

Oh ok, so all he needs is the switch. If that's the case, then cool

Cool, so switch for bracket then? (Even if the switch needs to be replaced at least I'll know what I need.) Checked with the PO, they do have a priority flat-rate box that's just big enough for the TC, up to you on that.

 

[tRustyK5]

Isn't there also an electric kick down switch at the base of the accelerator pedal on the TH400 trucks? I seem to remember one of those on a 6.2 TH400 C30 I parted out.

Rene

 

[Metalhead47]

Isn't there also an electric kick down switch at the base of the accelerator pedal on the TH400 trucks? I seem to remember one of those on a 6.2 TH400 C30 I parted out.

Rene

Didn't think there was anything electric in a TH400. I think there was only a vacuum line going to the tranny when I pulled the gas engine out.

 

[kennyw]

Isn't there also an electric kick down switch at the base of the accelerator pedal on the TH400 trucks? I seem to remember one of those on a 6.2 TH400 C30 I parted out.

Rene

Yes, there is that too.

 

[Metalhead47]

Yes, there is that too.

Would the same switch be on a gas TH400 truck?

 

[kennyw]

Would the same switch be on a gas TH400 truck?

Yes.

 

[Jimmard]

Still lookin for a TV cable bracket and torque converter. If anyone has those please let me know.

 

[DieselWarrior]

Im a little surprised that no one mentioned the steering box since it is tapped for the hydro boost, and Im pretty sure theres some other parts that you need to cabbage out too, maybe the resivore too? id have to take pix and post up, which I will if you need them.

Andrew

 

[kennyw]

Im a little surprised that no one mentioned the steering box since it is tapped for the hydro boost, and Im pretty sure theres some other parts that you need to cabbage out too, maybe the resivore too? id have to take pix and post up, which I will if you need them.

Andrew

The steering box is the same between a hydroboost and non-hydroboost truck. The hydroboost pump has an extra return fitting, but that should already be on the donor motor.