So at some point in the past I made the switch to LV in my transmission. Somehow I missed the L and went with the high mileage synthetic. I've probably been running it for at least a couple oil changes. Didn't seem to hurt the driveability but the question did it or could it have hurt the tranny? \

I had the tranny out when I pulled my motor I had cooler out and whole system drained (TC has drain plug). When I went to get the oil it was the sales guy who pointed out that I was buying LV not V.

I tried doing a search here but came up with nothing and a google search gave conflicting information. I'm hoping someone here will have a better answer.

I have put type V in it now

 

LV is too thin for the 4R100. I would expect accelerated wear, but I don't know of anyone that's tested it to see how accelerated the wear becomes.

 

Well the magnet wasn't loaded down in the pan but I run a in-line magnetic too. The transmission was rebuilt some time before I bought the truck so I don't know what mileage on it is or what was done. I've replaced the converter since I've had it. I never noticed any performance difference. Hopefully I didn't do too much to it.

Thanks Mark

 

Well an update on what I notice is different.

With V it shifts smoother. With LV the shift was hard.In stop and go traffic it hammered in real hard sometimes like a jolt. While it still shift firm with the 5-star it doesn't bang

So the Lv did effect the hardness of the shift especially 1st-2nd