Re: OT Truck transmission cooler

Posted by Jon H on October 25, 2004 at 13:11:01 from (69.26.16.110):

In Reply to: Re: OT Truck transmission cooler posted by Allan in NE on October 25, 2004 at 10:55:54:

Ok Allen,thats an angle that I have never considered,that that big marcell(bump) spring would wear out the low/reverse clutch snap ring groove.
My story was repeated from what a Chevrolet dealership mechanic told me. He was a bit grumpy because people wanted their trans cases replaced on the 5-50 warrenty and Chevrolet was refusing to do so claiming that operator abuse was breaking those ring grooves. They claimed the customers were driving the cars without warming up the transmissions,and excess pressure was breaking the cases. This may have just been chevys way of bypassing the warrenty claims on kind of a weak design.
One other point on doing what ever you need to do to make sure the trans fluid runs at or above 150 degrees to cook any moisture out of it,yet less than 240 degrees where the stuff breaks down pretty fast. The story I read in a trans cooler article,Just read it,sounds reasonable,but cant prove it. Is that a cooler installed after the radiator can run the trans fluid cool enough so condensation miosture is not cooked out of it,and moisture in the fluid will combine with sulfer in the trans fluid causing sulferic acid which will corrode all the machined surfaces in the transmission causing sticky valves,rough bearings and rough servo seal bore surfaces. Another thing they said was that cool wet fluid will penetrate the pores of hot clutch friction material(like some wingnut stuck in his driveway and having gone from low to reverse for the 100th time at 1/2 throttle)and that the miosture will explode into little puffs of steam and actually blow away bits of friction material. Kind of like removing carbon from an engine by dribbling water into the intake of a warm engine so the water will turn to steam in the carbon and blow it loose (That works,been there,done that(:-). I love this,we get a chance to exchange ideas/opinions and all learn somthing from it. Kind of like one bard said"When you get in trouble it's usually not what you dont know,but what you know that aint so" I think the translation is that if you dont know somthing,you will find out before tackeling the project.If you think you know,but what you know is wrong,then things get sad and ugly (:-( Another day,another dollar. One always hopes to do more good than harm in this world. :)

Follow Ups:

• Re: OT Truck transmission cooler Allan in NE 13:29:47 10/25/04 (1)
  • Re: OT Truck transmission cooler Jon H 16:18:46 10/25/04 (0)

Post a Followup Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]