Forum Discussion
blt2ski
Feb 08, 2016Moderator
One issue many seem to have with 15 series GM's is the rear axel itself. overheating. so use the best oil you can per say. You may want to put on one of the larger covers to help the oil stay cooler, along with it adds a bit more to the axel.
I have yet to trash a 4l60 trans towing or otherwise. 4l80's and its predecessor the th400, oh, about 30K mile replacement like clockwork! At $3000 per unit! The longest 4l80 is in my 2000 c2500, it runs empty with a 350 in it most of the time. Where as the others with 454;s were running above gvwr but close to gcwr towing 50-75% of the time. Bad tranny for towing all the time IMHO.
If you really think you will have issues, find a 2500 van with 8 lugs, then you will be better off in most cases......excepting the trans in a GM, UNLESS, you can get a new enough one with the 6l90.....now to figure out how to stuff one in my 2000.....dang computers......
marty
I have yet to trash a 4l60 trans towing or otherwise. 4l80's and its predecessor the th400, oh, about 30K mile replacement like clockwork! At $3000 per unit! The longest 4l80 is in my 2000 c2500, it runs empty with a 350 in it most of the time. Where as the others with 454;s were running above gvwr but close to gcwr towing 50-75% of the time. Bad tranny for towing all the time IMHO.
If you really think you will have issues, find a 2500 van with 8 lugs, then you will be better off in most cases......excepting the trans in a GM, UNLESS, you can get a new enough one with the 6l90.....now to figure out how to stuff one in my 2000.....dang computers......
marty
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