i changed the u bolts and i believe my 7.5 definitaly cant handle them 33's so has anyone has a 7.5 rear end and it started making a clank noise when shifting from park to drive or reverse?? well im buying a 8.8 soon so hopefully if thats my problem me getting a new rearend will cure the issue...

but liek i said has anyone had this problem with a 7.5???

 

we have the same trucks but mines stock, but when my trucks parked on a steep driveway it makes the clanking sound when i go into drive or reverse... does it happen on flat land for you?

 

hell ya!!

 

mine clanks with an 8.8 and 31's

 

Mine does this also when on a steep drive way but when im on flat ground its fine, I've noticed this in any car i've drove and was on a steep driveway

 

Mine does this as well, but mines not stock at all.

Has anyone ever figured out what makes the noise? It sounds kinda like the driveshaft to me since its more of a hollow sound, atleast for me.

 

no my friend that owned my truck before me bought a new driveshaft from ford, and i check it all the time its tight as anything. i havent figured out what it is yet, but i makes me worry about the backlash on the gears.

 

So you hear a noise when shifting gears, but think its the rear end? What about the obvious choice of the Trannsmisison?

 

my dads truck does the same thing. im pretty sure it happens because theres pressure on the tranny making it not shift out of grear smoothly.

 

thats my guess also it did it when i was bone stock on 30's and it still does it on 33's but only on steep driveways works fine on the roads i just avoid parking on steep driveways

 

well i took my truck to truckin up and i was told my rear end was going out oo and my truck has always done the loud thump noise from switchin into gear on a hill but this is like a metal clanking noise im going to try to record it to get a better opinion of what is going on with this thing... but my best bet is just hold out till i get my 8.8 and see if it stops oo its not the u joints either just changed them last night

 

It's maybe your u-joints, and if not that, the ring and pinion has too much play in it. You can shim up the ring and pinion to stop the clunking, but that 7.5 is definitely too weak for those tires.

 

i would check your u-joints. mine made a noise like that when they went bad.

 

i put brand new brute force u-joints in last night so im just gonna deal with my rearend cuz i think it has play in it so ima just wait till monday and buy that 8.8

 

The 7.5 is not that bad of an axle. It can take a decent amount of abuse.

 

the 7.5 cant take my abuse though... lol ive had these 33's for almost 2 weeks and by the second week the axle started whining and clanking so im upgrading 8.8 4.56's LS

 

X2

The Ford 7.5 is a great axle.

The weak link is the janky notched crosspin they come with.

 

they cant take the abuse that a 3.0 gives it on 33's.

 

And the reason that happened is the cross pin.

 

lol! I love that pic!

 

and i would seriously **** a brick if i was going down the interstate and my truck did that... cuz its gonna be a week or so before i actualy have the money for my 8.8!!!