f-150 diff question

[--weezl--]

before you say anything, i posted in this section, because i am 99% sure the diff is an 8.8 which is the same diff as the ranger... and this section's discription said d28 d35 7.5 & 8.8

while i was talking to my dad, he was talking about his truck having some problems, it's a 96 f-150 reg cab long box 4x2 manual trans 5L with i believe 4.10's in it. He was saying that after backing out of the driveway, and turning left to leave (90* corner) he hears a loud bang coming from the rear end, he said that it sounds to him like a limited slip unloading, but that doesn't really make sense to me, as clutches typically slip smoothly... he also seems to think he's got a trac-loc in it, but i don't think he does... as far as i know, he's never done the fluid in it, and it's got about 250 000+ km on it... he is planning on selling the truck, but i figured it's an easy enough job to change the fluid that might take care of it... anyone had this problem or know what might be causing that bang?

 

[Sasquatch_Ryda]

Well it will either be a normal open differential or it could be the TracLock if its got a limited slip. And yes, it will have an 8.8 in it.

The 8.8's have a bad habbit of chewing up spider gears/side gears in the carrier. I'd pull the cover and see what the condition of them is. Rarely will a fluid change fix a noise like that, its usually related to something broken or binding up.

 

[--weezl--]

hmmm, any cheap ways to fix this to sell the truck?

 

[Sasquatch_Ryda]

Pull the cover...see what's needed. If the spiders are the problem, order a set of spider gears and install them. Reseal and fill with new gear oil.

 

[86 slo-vo]

agreed most likely a chewed up spider...find a junkyard and pull a good set