I have a 1999 Tahoe with IFS and Auto-Trac. I put 32” tires on it a little over a year ago and have since then had problems with my rear drums warping every couple months. I’m not hard on the brakes and haven’t modified anything else that would effect them but I’ve been told that because my tires are not the stock size that my drums are being thrown out of adjustment and possibly could be having an adverse affect on my ABS and a couple other things that I already knew about like transmission and speedometer (I bought a HyperTech Power Programmer and adjusted the speedometer as close to actual speed as I could, but never messed with my tranny). My question is, what can I do, aside from going back to stock tires, to correct this? Especially the brake problem, seeing how I have had to either turn or buy completely new drums just about every three months or so for over a year now. I read an article, that I will post a link to at the bottom of this thread, which has them doing a disk brake conversion kit on the same model and year SUV as mine. I’m curious if anyone has any comment on this idea as well? But I suppose my overall question is how do I fix these problems?

Thanks Guys


Here's the link to the article

SSBC Disk Break Conversion (http://www.fourwheeler.com/techarticles/suspension/129_0605_chevy_tahoe_ssbc_disc_brake_conversion/)

Since I hadn’t gotten a reply yet I called up an old mechanic friend of mine from back home. He says that oversized tires, even as small a difference I have (about an inch or so) between the stock and non-stock tires, will make my drum brakes come out of adjustment. I guess when they come out of adjustment that causes them to drag and create more heat then they’re suppose to have which causes them to warp. He said that he knows there are fixes for this but doesn’t know personally what they are. He also said that a disk brake conversion kit might help but he hasn’t put one on a SUV of my year.