How much power will a stock 8.8" differential take?

[jah81592]

Exactly! What I stated previously. I agree 100%! And to add to this is the Ex has larger 31T axles than the Mustangs. These rears are good stuff.

 

[rocket 5979]

Exactly! What I stated previously. I agree 100%! And to add to this is the Ex has larger 31T axles than the Mustangs. These rears are good stuff.

Damn it I am a post*****. I got to admit that I did not read exactly all posts in here before replying.

It is odd how people start worrying about these 8.8" rear diffs like they are glass or something. They take a beating on some of the higher hp manual vehicles not to mention when launching an auto vehicle. There are not many people running enough power, especially with the Explorers, to be truly concerned with an 8.8" diffs ability to hold the power. 400+ hp is nothing to sneeze at but the 31 spline 8.8 will tough it out.

 

[CDW6212R]

Jon knew that the rear was strong enough, I think he's just worried about something minor. This was just his wording to get the question out here. The 10 bolt Chevy guys have to worry about smallblock power, the 8.8 is very good as is. Regards,

 

[Xan]

Where is the BS smiley at again? That stocker 8.8" of Jon's will easily last through the power he is putting down now. The problem he is having is VERY unlikely to be caused by the additional power he is running.





I have seen the 28 spline 8.8" rears live past 600 hp and have seen 31 spline 8.8" rears last past 700 in stock form through an auto.

With a diff brace and upgraded halfshafts I have seen people push past 1,000 hp with the 8.8" no problem.

Actualy truck axles are stronger then car axles... duh ok you knew that. but the reason it broke was because there was a bearing going bad and might have been misadjusted. So yeah when i'm running the stock 191HP then i drop my engine and trans in that is putting out 400+ hp and a 3500 stall in my trans it probaily would have been fine for a long time if i hadn't put that much more power through it.... So what i'm saying is if there is a problem and hes putting more power through it, theres a better chance of failure then if he was running less power so it shouldn't be taken lightly.
Theres actualy very few stock diffys (solid axles any how) chevy or ford that are actualy weak

 

[rocket 5979]

So what i'm saying is if there is a problem and hes putting more power through it, theres a better chance of failure then if he was running less power so it shouldn't be taken lightly.

That is a much better way of wording your point than the way you did previously.

 

[rocket 5979]

So yeah when i'm running the stock 191HP then i drop my engine and trans in that is putting out 400+ hp and a 3500 stall in my trans

What vehicle are you talking about here?

 

[Turdle]

So anyway--
I drove 25 miles last night-not a clink.
Today right after polishing my wheels, I went to the convenience store for a gatorade-
Oh-she was fine--looking at me, smiling-
I waved, she waved-I smiled and put it in reverse--


clank

 

[MountaineerGreen]

Humm......

Just buy some dino oil, pull the diff cover and see what you've got. Its the best place to start, IMO.

 

[Turdle]

Since I'm meeting up with Dan tomorrow-I'm going to have him shift it back and forth while I watch--
I'm going to heat it up good and hot driving to KC, it's about 125 miles over to Dans side of town.

 

[94 Crawler]

Just an idea

I just thought of a car I worked on at some point that ate my lunch. Check your caliper bolts may be nothing. Also if the trac lock is worn the spider and side gear will add to the amount of movement in the drive shaft due to the spiders having to load the axle gears in each direction. Also my 8.8 is 28 spline and i had to rebuild it after only 236,000 miles. Then it was axle a bad axle berring probably due to original fluid, 35's, and many miles towing derby cars in excess of 5,000 lbs. Just one more thing dont use regular grease in the slip youlk. Black molly lube works much better.

 

[Xan]

What vehicle are you talking about here?

my 1983 Z28 i blew the front main and was shooting oil all over so we rebuilt the crap outta it. It got wrecked by a pos dodge truck (drunk driver) but the drive train is in my friends camaro now and the body is in the scrapper

 

[jah81592]

So anyway--
I drove 25 miles last night-not a clink.
Today right after polishing my wheels, I went to the convenience store for a gatorade-
Oh-she was fine--looking at me, smiling-
I waved, she waved-I smiled and put it in reverse--


clank

My opinion, too much backlash, definately only an opinion being I am not there and able to ride in it. Take an initial .005-.010 out(move the diff toward the pinion) and you should see an improvement. But please don't get too tight then this baby will moan like a *****. Small adjustments till the backlash is right. I bet if you run the pattern on your gears you will see the wear pattern is wrong.

 

[jah81592]

Damn it I am a post*****. I got to admit that I did not read exactly all posts in here before replying.

It is odd how people start worrying about these 8.8" rear diffs like they are glass or something. They take a beating on some of the higher hp manual vehicles not to mention when launching an auto vehicle. There are not many people running enough power, especially with the Explorers, to be truly concerned with an 8.8" diffs ability to hold the power. 400+ hp is nothing to sneeze at but the 31 spline 8.8 will tough it out.

You said *****! I never really saw you in this light. How much for a night dude? I might know some ugly needy women I can send your way. Naw, I wouldn't do that to ya brotherman. :

 

[CDW6212R]

The best backlash is around .009-.012, shoot for .009 setting them up.

 

[Turdle]

Ok, I'm having a hard time finding a good writeup--

I did find this--but I think I need to read it a few more times-I don't quite get it.

http://www.corral.net/tech/drivetrain/gears.html

If anyone knows of a guide to help me, I'd be forever in your debt

BTW
I completed a 300 mile round trip yesterday-gas mileage was good. Nothing broke. No weird noises or vibrations--

 

[CDW6212R]

There is a lot of detail in that, I'm familiar with changing differentials, but not gears. I can do the backlash, and hopefully that's all most people need(gears fine).

Pull the cover and inspect things, something major should be obvious. You can do the backlash, tighten if necessary, with a dial indicator, magnetic mount, and a shim kit for the diff. If so buy the best shim kits, they are about $30 and use quality housings with internal shims. I needed one on short notice and almost used a cheap kit from a local shop. Fortunately this Mountaineer was perfect and needed no shim changes. Regards,

 

[MountaineerGreen]

Any updates?

 

[Turdle]

Any updates?

yup--
I'm getting replacement 410 front and rear diffs--

 

[CDW6212R]

I need someone to explore what it takes to build the front carrier well. I need to go through mine sometime.

 

[MountaineerGreen]

Talk about a tire shredder, those 4.10s are going to make your tires hurt.