I am getting a set of 4.10's installed in my Bullitt. The car has only 30,000 miles on it. Do I need a bearing kit upgraded or am i ok with reusing the ones in there now?
I only had 8k miles on my stang (04 gt) and had to get a new bearing. The guy that did it for me works at FMC and said the old bearing is good but they usually get messd up when it gets pressed off and that it's much easier with a new bearing. But he just replaced the bearing ($20) not a whole kit. Also this guy is well known in my area and can deff be trusted.
I got the bearing kit when I had my gears changed out. My car had 35,000 miles on it. I figured I would have them put new ones in as long as they are putting new gears in.
You'll have to buy a shim kit anyway, and if you get the bearings with it it's usually a bit cheaper.
I just had mine done, and with 90K on the stockers, they were mostly just fine. I had them replaced as a matter of practice but, the point is you never know if you'll need bearings or not. Just because they're not bad when you take them out doesn't mean they'll be good for much longer. Just get them and enjoy the peace of mind that you'll get knowing you have new parts that still have life in them.
i bought the master rebuild kit for mine. shims the whole deal for the 8.8. my car has 93,000 miles on it. I drive hard so I made a wise deicision to do it right and not pay for it when i'm on the side of the road.
if you got FRPP it comes with a shim kit, just installed my 3:73s this weekend, had to get a new bearing cause the stuff was all locked up, but the new bearing was worth it in my mind, 30k+ miles a few new parts in the rear makes me feel better. You may or may not need extra shims. Good luck.
Given that the only way to get the bearings off the carrier and the pinion are to press them off, it seems like cheap insurance to simply get new ones. From what I've seen, like on the carrier, the press can only act on a small part of the bearing because there's just no room to get full support in behind it because the carrier is in the way. Thus, tons of force are applied to a very small part of the bearing to get it off.
It can't be good for the bearings to be multiply-pressed on & off like that...
You have no idea how the shims work on the carrier do you?
You shim the position of the carrier side to side. You never remove the carrier bearings unless you are replacing them.
The pinon on the other hand would require removing the pinion bearing multiple times if it needs to be shimmed, increasing the chances of damaging the pinion bearings.