The_Head

My brother and I finally got everything installed this weekend.

1. PATC "Megaviper" 46RH
2. Suncoast TC
3. Suncoast VB
4. Suncoast FP
5. 19 quarts ATF-4 transmission fluid ($$)

The truck wont shift worth a edit. On the first testride I got it to shift out of first, but it was waaay to high, like around 40 mph. It kind of banged into the next gear, it was not smooth at all.

So, we did some searching on this and other forums and were led to the TV cable adjustment. So, we got that into spec, and now it won't shift at all.

Since PATC builds alot of gasser transmissions but is not well known for building diesel transmissions, we're thinking they put the wrong governor weights in the OD section. We're hoping it is not that.

PATC also sent a VB with the transmission, even though I deleted it when I ordered... so we might try putting that in there to eventually.

I need some brainstorming on what else we could have missed. Thanks guys.

apwatson50

I think I remember something about the way the TV cable works differently between the 727/518 and the 47rh. As in the 2nd gens are setup as a pull cable and the 1st gens are setup with a push cable. So you need to swap the arms around on the transmission.

Might search around in here on that, I know I read it in here somewhere....

Crossy's son

I think it may have something to do with the suncoast VB in the PATC trans... they kinda design their trans to work with thier VB.

The_Head

It's still a 46RH transmission though.

archer39

the T.V. cable is the only external adjustment that can be made . I would try some different adjustments. The way Goerend VB are designed you need to have T.V. travel as soon as the pedal starts to move and it needs to be at full travel when you are WOT. Perhaps the suncoast is the same way??

The_Head

I take that to mean we need to take all the slack out of the TV line?

I think that has been tried already.

archer39

That is how the Goerend VB need to be set up. I would be giving PATC a call ASAP. Driving without the correct line pressures can cause damage.

The_Head

PATC says to connect a pressure gauge to the governor port. It should be 1 psi for every 1 mph of vehicle speed.

If pressure is correct and it's not shifting, it's the VB.

If no pressure present, it's a possible problem with the governor.

They also suggested putting the VB they sent (It's just a stocker BTW) back in the transmission.

They also insist it's a 47RH which makes me nervous.

apwatson50

Did you look in this thread?

https://www.dieseltruckresource.com/....html?t=114702

"TV bellcrank lever:
This is VERY important, the 94-95 lever is incorrect for the 1st gen application, won't travel correctly and the trans won't shift right. You will need to take the one off of your current A518 or 727 and put it on the trans going in the truck."

The above quote is from the 2nd post by JD730. The transmission you received is a LU transmission correct? So it would be a 47RH?

The_Head

No, I did not see that.

I do believe we went to great effort to use the stock lever, because we had a little laugh when we noticed the new trans came with a new lever. Will double check. I'm starting to think you are right.

The transmission is a non lockup unit. I had to go through a small hassle to make sure I got a non-lockup transmission when I ordered it.

I think PATC just gets confused because the 46RH/47RH/47RE all use the same case design? ...I dunno.

The_Head

What is needed to check the governor pressure?

Mcmopar

A pressure gauge and some tubing, the connection on the tranny is 1/8 NPT

65fury

you'll have to get a pressure guage and hose kit, they aint to expensive, i think i got mine at harbor frieght works great, no problems yet.

jason

BC847

Did shifting from 2nd to 3rd have it rev very high as well?

If so, the governor weights in the OD section may very well be for a gasser.

The_Head

It never got to third. It shifted to 2nd during the first testdrive, then in the others it never got out of first.