Ranger 7.5" 4.56's install

[mhughes165]

okay....im tryin to figure out what is suggested when installing 4.56's into a 7.5, i have always had to make a small notch on the backside of the RG to fit the pin in it, the reason for doing this is simply the fact that the R&P do not fail usually on the 7.5, it is usually the pin or a spider gear, would u suggest instead notching a already weak pin to fit in the carrier....or instead notching the ring gear to clear.....

just a question in referance to the 7.5" rear i had sold...i notched the ring gear and am told now that doing it that way is incorrect...

[Hahnsb2]

Notch the gear, tons of people do it, I did it, the pinion doesn't contact the notched area anyways (well assuming the gears are set up properly it wont contact).

[mhughes165]

thats what i thought.....

keep the opinions coming, the more the better....

[Evan]

Originally Posted by mhughes165

thats what i thought.....

keep the opinions coming, the more the better....

Notch the gear. That's the best way to go. I have the 5.13s in my 8.8 notched and it works great.

[mhughes165]

what some people dont realize when they take there rears to get setup by professionals, lots of times there is no way todo it without notching the ring gear, simple as that

[MAKG]

As for the R&P not failing, I'd be a bit concerned about that with a 7.5 and 4.56 gears. The pinion starts to get TINY at ratios like that (though the ring gear is quite large). It's not such an issue on 8.8s.

Are you sure the axleshafts can handle the torque you'll be sending to them? That's 20-40% over stock. No 7.5 came with 4.56s from the factory. Torque at the axles is multiplied by the gear ratio.

[mhughes165]

Originally Posted by MAKG

As for the R&P not failing, I'd be a bit concerned about that with a 7.5 and 4.56 gears. The pinion starts to get TINY at ratios like that (though the ring gear is quite large). It's not such an issue on 8.8s.

Are you sure the axleshafts can handle the torque you'll be sending to them? That's 20-40% over stock. No 7.5 came with 4.56s from the factory. Torque at the axles is multiplied by the gear ratio.

it was 1 in a truck on 32's, and will be going into a 4 banger street ranger, i dont think the worry would be about the axles in this application

im just making sure i had done the proper thing with notching the ring ringer to get the cross pin in

[Evan]

Originally Posted by MAKG

As for the R&P not failing, I'd be a bit concerned about that with a 7.5 and 4.56 gears. The pinion starts to get TINY at ratios like that (though the ring gear is quite large). It's not such an issue on 8.8s.

Are you sure the axleshafts can handle the torque you'll be sending to them? That's 20-40% over stock. No 7.5 came with 4.56s from the factory. Torque at the axles is multiplied by the gear ratio.

I think he should be fine, even with a locker, as long as he doesn't exceed a 33" tire size. The weakest link on a 7.5 is generally the spider gears; you'll toast those before a pinion gear.

True, the gear is small, but still plenty strong enough. My 5.13 pinion gear in my 8.8 is about the same size, and the 5.13 in my Dana 35 is smaller...although the front axle sees less load generally.

[mhughes165]

Originally Posted by Evan

I think he should be fine, even with a locker, as long as he doesn't exceed a 33" tire size. The weakest link on a 7.5 is generally the spider gears; you'll toast those before a pinion gear.

True, the gear is small, but still plenty strong enough. My 5.13 pinion gear in my 8.8 is about the same size, and the 5.13 in my Dana 35 is smaller...although the front axle sees less load generally.

it was suggested that i shoulda notched a already weak cross pin instead of notching the ring gear

[89_Black_Beast]

Hey mike... I'm reading responses too... Not trying to prove you wrong just tryin to learn. I never setup non oem gears in a 7.5 only stockers. With my 8.8 and a buddies I notched the c/p.

I'm the guy who bought the rear for a street banger. I was always told to never ever touch a ring gear. Even the smallest nick or notch could make the gears sing and hum. I always notched the c/p. Just my .02 Like to hear opinions also.

Thanks

[mhughes165]

Originally Posted by 89_Black_Beast

Hey mike... I'm reading responses too... Not trying to prove you wrong just tryin to learn. I never setup non oem gears in a 7.5 only stockers. With my 8.8 and a buddies I notched the c/p.

I'm the guy who bought the rear for a street banger. I was always told to never ever touch a ring gear. Even the smallest nick or notch could make the gears sing and hum. I always notched the c/p. Just my .02 Like to hear opinions also.

Thanks

the part where i notched the ring gear doesnt rid on the pinion area, and there are actually many rears u have to notch the ringgear on the inside edge for it to clear

and ive seen rears that get the covered pulled just for regualr maintence to discover teeth missing in the on the RG that never made a sound, my buddys 85blankstar is a example of this, his never hummed or sung, just everyonce and a while would hear a slight pop when goin around a corner, we pulled the cover and low and behold the RG is ****ED, u can ask alland about this one too, this was my buddys bII, he talked to allan about it quite a bit and had allan setup his rear for him after they found it at a local yard

but ya, u never notch the CP on a 7.5 cause that along with the spiders is what is prone to failure, which is why usually a spool or locker that eliminates the spiders in the back usually make for a very stout rear

[mhughes165]

alright, heres the video that he had taken to try and show me that this rear is bad

http://www.youtube.com/watch?v=bnBSbztlGSI

at first where u can see the rear is the rear from his truck, the second where u cant see the rear is the one that i sold. listen to the 38 second mark very closely, now im not tryin to start anything with anyone, but that sounds like the distinct sound of a turbo blowoff when u let off the gas.

im just lookin for input as when the previous owner of this rear ran it he had no issues with any whining sounds, it was pulled from the truck with (after i got in contact with the PO earlier today) not even 50 miles on the rear. im not trying to hose anyone over here or pass off a rear that i know to be bad because those that have dealt with me on here know that.



i recieved notice that the rear was whining today, after he cleaned it up ran fluid it through it 3 times before he found the time to message me on here.....

[4x4junkie]

Very hard to tell from that... It does sound like gear whine from the beginning, but at the end on the road (from inside) what I hear seems too low-pitched to be R&P whine at the speed it looks he's going.

Whatever it is, it's NOT because of notching the gear, if that were the case, it'd make a chunking or clicking sound with each wheel rotation, not a whine.

[bottledgt]

notching aint gonna cause a whine. hell it probably wont even get close to contacting anything. you could carve neat designs all around it if you wanted and it wouldnt mater

[mhughes165]

apparently, in the first section of video where u can see the chrome diff cover that is his other ranger with a 7.5 in it, i guess he had that video for comparison or something, and the second one where u cant see anything is supposed to be the rear i sold him in the street ranger (lowered 2wd greenish) that he has driven out to pickup the rear, what i dont understand is why he didnt take both videos from the same truck, if i had a issue id have evidence from the same vehicle not a different truck.....