DavidS
Registered User
Hey guys, I finally got the rebuilt motor into the truck and drove it for the first time! A fresh motor and a turbo make for a noticeable difference over the '88 NA! Thanks for everyone who helped me as I was getting through that project!
So....now I'm having trans issues, and haven't even gotten through break-in
Here's the breakdown:
Minor issue: 1-2 shift bangs when cold, then smooths out
Major issue: After the truck is good and warm, getting back into the accelerator after coasting at around town speeds (say after slowing slightly for the car ahead to make a turn) reaults in the engine free spooling in neutral, before slamming down into gear. Once it has done this once it does it every time until the truck is off and cooled down. The first time it happened a group of codes were thrown: VSS insufficient signal, FIPL sensor out of range, and an MPLS one I can't remember.
What's been done:
I replaced VSS. Removed part had very minor dusting of metal. Replaced with NAPA unit. Cleaned connector. No difference after test drive and VSS code returned.
Shop replaced MPLS with OEM unit. Same shop adjusted FIPL to provide correct readings. Those two codes did not return after test drive but shifts were now occuring way to late, so they adjusted the FIPL again and got shift points to return to "normal". I don't believe that code has returned yet. It doesn't make sense to my brain that the correct adjustment per volt meter would not yield correct shift points...
The last item the shop noticed is that when measuring the reference voltage at the FIPL which they said should be a steady 5v, they observed it fluctuating, but they can't determine the cause.
So now they arean't sure what to do next. Before I take it to another trans shop I thought I would see what you guys think.
Thanks as always!
So....now I'm having trans issues, and haven't even gotten through break-in
Here's the breakdown:
Minor issue: 1-2 shift bangs when cold, then smooths out
Major issue: After the truck is good and warm, getting back into the accelerator after coasting at around town speeds (say after slowing slightly for the car ahead to make a turn) reaults in the engine free spooling in neutral, before slamming down into gear. Once it has done this once it does it every time until the truck is off and cooled down. The first time it happened a group of codes were thrown: VSS insufficient signal, FIPL sensor out of range, and an MPLS one I can't remember.
What's been done:
I replaced VSS. Removed part had very minor dusting of metal. Replaced with NAPA unit. Cleaned connector. No difference after test drive and VSS code returned.
Shop replaced MPLS with OEM unit. Same shop adjusted FIPL to provide correct readings. Those two codes did not return after test drive but shifts were now occuring way to late, so they adjusted the FIPL again and got shift points to return to "normal". I don't believe that code has returned yet. It doesn't make sense to my brain that the correct adjustment per volt meter would not yield correct shift points...
The last item the shop noticed is that when measuring the reference voltage at the FIPL which they said should be a steady 5v, they observed it fluctuating, but they can't determine the cause.
So now they arean't sure what to do next. Before I take it to another trans shop I thought I would see what you guys think.
Thanks as always!