Re: This worked well
Posted by Ross On 2019/3/22 8:57:30
We'll put this under the category of "this didn't work well".
Have in a 55 400 that had a cooler breach some time ago. It seems that the PO did not change the fluid after this misshap, or perhaps did not change both convertor and trans.
Complaint from the new owner was that direct drive had gone on vacation and that the trans would sometime not engage. Pretty well certain the latter problem was a slipping reactor clutch in the convertor--a not uncommon problem in 55s. When that slips the trans feel all but in neutral when you give gas.
Was shocked to find a tremendous amount of mung in the pan and scored bushings in a trans I did, oh a dozen years ago or so. Taking apart the high range clutch I found that the facings were no longer adhered to the backings and were just floating around in the clutch pack. NEVER seen that before. A new failure mode. That is when I asked and learned the history of the cooler breach and that the fluid had been contaminated with coolant.
These coolers seldom breach, so no need to panic, but if yours does, please be thorough about servicing the transmission. Otherwise, it is very expensive.
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Have in a 55 400 that had a cooler breach some time ago. It seems that the PO did not change the fluid after this misshap, or perhaps did not change both convertor and trans.
Complaint from the new owner was that direct drive had gone on vacation and that the trans would sometime not engage. Pretty well certain the latter problem was a slipping reactor clutch in the convertor--a not uncommon problem in 55s. When that slips the trans feel all but in neutral when you give gas.
Was shocked to find a tremendous amount of mung in the pan and scored bushings in a trans I did, oh a dozen years ago or so. Taking apart the high range clutch I found that the facings were no longer adhered to the backings and were just floating around in the clutch pack. NEVER seen that before. A new failure mode. That is when I asked and learned the history of the cooler breach and that the fluid had been contaminated with coolant.
These coolers seldom breach, so no need to panic, but if yours does, please be thorough about servicing the transmission. Otherwise, it is very expensive.
Attach file:
(423.84 KB)
(331.83 KB)
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