What do you do. What do you use I have done it several ways on the past and I am looking for more ideas. The dealer service recommendation is to replace the cooler and the lines but that is a $400 expense to go OE. For 2/3 that $$$$ I could get a front mount Mocal cooler that is 2x the size of the OE one and I have always had great luck with Mocal coolers.
Depends on what you want to get out - if it's just old fluid, run some new fluid through there. Maybe add an inline filter at the end of the cooler circuit for some insurance.
If it's really nasty you'll have to look into solutions that involve running bad-for-your-trans chemicals through the cooler and/or lines and then getting it all out before reinstallation, which is going to be tricky. I think your best bet might be bulk amounts of brake cleaner followed by compressed air, but even this doesn't guarantee that all the particles in there will be cleaned out.
999MP-AM006P from Nissan.
We are required to use this on every car/truck we put a transmission in. (Nissan dealer) Disconnect the lines at the trans and shoot it on through...
There is a similar product made by one of the drag racing trans companies.
If the old unit failed to the point you had metal flakes REPLACE the cooler. No amount of flushant will clean and remove the stuck particles that will come out with high heat later on. If the old unit just was worn and you got to it on time flush with two-three cans and go. I like to use 3 cans 1st can in the direction of normal flow second in Rev flow 3rd can in normal flow.
Me I like the low restriction flow of the B&M coolers (sold under at least 5 brand names) they have no 180 bends and are low cost.
Dr Tranny Kooler Kleen by LubeGard
Lots of parts stores have a can of that stuff, a buddy brought me some and it worked awesome its like foaming trans fluid. I used a mason jar to collect the spent fluid so I could see when it was clean.
How about this: an engine with an oil cooler suffers a massive engine failure. The oil filter is pre-oil cooler. Still replace the cooler?
ross2004 wrote: How about this: an engine with an oil cooler suffers a massive engine failure. The oil filter is pre-oil cooler. Still replace the cooler?
Because of the oil filter bypass valve you can never be sure all oil was filtered...but if the oil filter is directly after the cooler, you can run a high-flow filter or one with no bypass valve to be sure it catches any flakes that were in the cooler when you reuse it.
ross2004 wrote: How about this: an engine with an oil cooler suffers a massive engine failure. The oil filter is pre-oil cooler. Still replace the cooler?
Id suspect theres less particles than when a trans bites the dust, id flush the cooler with the trans cooler flush into a glass jar or cup chances it will come out clean. If its an expesive motor its getting replaced with it might be worth it to just buy another cooler
When possible replace the cooler. The stress relief from knowing its clean is worth the $80 for the cooler IMHO.
Three gearbox replacements mid Daytona 24Hrs circa 1995 says change the cooler. Debris got caught in the lines/cooler and managed to make short life of the replacement gearboxes. AWD Talon for what its worth.
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