Installed used trans, sensitive to the 'hunting' sensation.. some small indication of same but nowhere near the extent of previous, otherwise shifted fine EXCEPT a couple times where slight 'tip-in' resulted in shift-up, rather than down. Otherwise trans shifted well and solidly. No thump,, no hesitation.
BUT front seal blown again in 65 miles.
What I might have done wrong: Did not replace front seal, showed no wear on pump collar. or evidence of long term leakage in bell hsg
Did not mount TC and check for run-out prior to install
Did not check for pilot bush integrity
Re-used the VSS on the van, instead of the one that came with the salvage yard trans.
- - - - - - - So it comes down to either a mechanical problem... or a bum VSS. I have seen a hint on web research that inop VSS happens at same time as blown front seal.. so they may be related. In one of those there was a cryptic ref to high pump pressures..
BUT; this is an 89, not one of the later versions where the PCM controls everything, right? Will a faulty VSS in this series result in PCM trying to engage two clutches at once? And does that result in the symptom.
What I did right:
Stopped as soon as possible when I noticed traili blue smoke... trans did not slip or otherwise act up, so I may have saved it. Though I'm obviously going to have to get a new TC.
AND YES... I am kicking my own arse, well and often for short-cutting
So, does anyone here with expertise have advice? I cant afford a full rebuilt at this time.
DOES THE VSS cause this? (Cruise didnt work either natch, but hadnt for at least 25,000 ) And how much can I expect to spend for the TC?