View Full Version : Synthetic oil in T-case
gallf1
04-12-2010, 02:23 PM
Hi:
I am running synthetic oil in my Ashcroft high-ratio t-case. It has developed a slow seeping leak around the intermediate shaft area which I am attributing to the o-ring.
Before I pull it out and replace it, does anyone know if the o-rings are not compatible with synthetics?
Also, should I smear some Hylomar around the shaft and o-ring before I re-install for alittle extra insurance?
Thx!
Synthetics are prone to creepage / seepage to a much greater degree than are dino hypoids. Good seals are key (to state the obvious).
I've used synthetics for almost 20 years; my truck doesn't seem to leak any worse than any others I've seen, and is better than many.
alaskajosh
04-13-2010, 12:37 AM
This might open a can of worms but I understand that Ashcroft's warranty doesn't allow use of synthetics.
Kind regards, Josh
gallf1
04-13-2010, 09:30 AM
Hi Josh:
Not sure where you got that info....it is not in their warranty statement. They do recommend specific oil types for the automatic transmissions but not for the High Ratio T-case (which is what I have).
Thx
alaskajosh
04-13-2010, 12:13 PM
Hi Josh:
Not sure where you got that info....it is not in their warranty statement. They do recommend specific oil types for the automatic transmissions but not for the High Ratio T-case (which is what I have).
Thx
Well I admit that it is hearsay... though it was said by RN (and I don't remember the name I spoke to). It goes along with the whole "yellow metals" debate. I put Amsoil in my T case despite that and other doomsayers. I'm not worried about it but couldn't escape the irony of a RN rep stating that syn where not safe with yellow metals (citing, for one thing, the ashcroft case) but they sell and recommend Amsoil for Series gear boxes.
Kind regards, Josh
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