rear end

P_Dizzle · 08-04-2007, 10:15 AM

I have a 98 4x4 blazer and i am wondering what read end come in it stock? and if chevy has a stronger rear end maybe out of a zr2? the problem i am having is iv destroyed my rear end in my blazer 2 times in 2 years and i need to replace it again and i want something stronger if there is such a thing

P_Dizzle · 08-04-2007, 01:09 PM

sorry i meant zr5

~~442typhoondude~~ · 08-04-2007, 08:16 PM

You shouldn't be going through rear ends like that unless you're making some pretty stout horsepower.

If you have an 8.5" rear and you're going through them like that with an engine short of 400hp, you may have something else wrong. Even the 7.5" is a pretty reliable little rear.

Is your truck heavily modified? Are you extremely abusive on it? Who did the installation?

P_Dizzle · 08-04-2007, 09:36 PM

i wouldnt say extreamly abusive but iv put it threw the paces doin dounuts in the snow and stuff like that it has been in a wreck and the frame was bent some i think that might have somethin to do with it and i had the first rear end installed by a local shop

Goran · 08-07-2007, 10:20 AM

you wanna see a destroyed rear end... here is mine from my 2000 envoy...

lesson learned, never pull out tree stumps

P_Dizzle · 08-07-2007, 01:08 PM

oh man that sucks
expensive lesson

iv found out i have 3:42 gears with the open limited slip i guess its called
and most everyone has been telling me its probably an 8.5" rear
what would happen if i changed the gear ratio
i know its got something to do with gas mileage vs acceleration but i don't know which is which

Goran · 08-07-2007, 01:37 PM

can't change the gears i think... will mess with the 4x4 if front and rear differential gear ratios are different... mine was 3.73 with a limited slip...
GM uses a coo-coo clock limited slip... it winds up after slipping, then it engages... that's how mine went, nothing, nothing, then BANG, limited slip locked up and i snapped a 10,000lb tow strap... tranny is sluggish in 1st and the shift from 1st to 2nd isn't like it use to be... i doubt it's an 8.5"... mine is 7 and 5/8... stick a tape measure in there, you should be able to figure which one you have

as for gear ratios the lower the gear ratio the better the gas milage and better top speed, the higher the gear ratio, the better the acceleration

P_Dizzle · 08-07-2007, 01:43 PM

iv been looking for a rear end all day long and its not going well at all I'm getting pretty irritated about it too haha

~~442typhoondude~~ · 08-07-2007, 07:11 PM

Did you replace the complete rear or just the differential?

If you've just been eating diffs, your entire rear could be shot from the accident that caused the frame damage.

Goran, that's ****ing horrible. Here I thought the blown up rear that came with my truck when I bought it was bad missing a few teeth.

Goran · 08-08-2007, 10:25 AM

Quote: Originally Posted by 442typhoondude

Goran, that's ****ing horrible. Here I thought the blown up rear that came with my truck when I bought it was bad missing a few teeth.

Oh yeah, when i break something, i break it good

of course i wasn't laughing then

GeorgesBlazah · 08-15-2007, 08:44 PM

The 8.5s look more rounded than the 7.5/7.65. I saw pics somewhere...I gotta dig em up.

08-04-2007, 10:15 AM	#1
P_Dizzle Registered User Age: 24 Join Date: Jan 2006 Posts: 35 Location: Ny User is: OffLine	rear end I have a 98 4x4 blazer and i am wondering what read end come in it stock? and if chevy has a stronger rear end maybe out of a zr2? the problem i am having is iv destroyed my rear end in my blazer 2 times in 2 years and i need to replace it again and i want something stronger if there is such a thing
	[Reply w/Quote]

08-04-2007, 01:09 PM	#2
P_Dizzle Registered User Age: 24 Join Date: Jan 2006 Posts: 35 Location: Ny User is: OffLine	Re: rear end sorry i meant zr5
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08-04-2007, 08:16 PM	#3
~~442typhoondude~~ Broke User. Age: 25 Join Date: Mar 2006 Posts: 1,395 Location: User is: OffLine	Re: rear end You shouldn't be going through rear ends like that unless you're making some pretty stout horsepower. If you have an 8.5" rear and you're going through them like that with an engine short of 400hp, you may have something else wrong. Even the 7.5" is a pretty reliable little rear. Is your truck heavily modified? Are you extremely abusive on it? Who did the installation?
	[Reply w/Quote]

08-04-2007, 09:36 PM	#4
P_Dizzle Registered User Age: 24 Join Date: Jan 2006 Posts: 35 Location: Ny User is: OffLine	Re: rear end i wouldnt say extreamly abusive but iv put it threw the paces doin dounuts in the snow and stuff like that it has been in a wreck and the frame was bent some i think that might have somethin to do with it and i had the first rear end installed by a local shop
	[Reply w/Quote]

08-07-2007, 10:20 AM	#5
Goran Registered User Join Date: Apr 2006 Posts: 191 Location: Ontario User is: OffLine	Re: rear end you wanna see a destroyed rear end... here is mine from my 2000 envoy... lesson learned, never pull out tree stumps
	[Reply w/Quote]

08-07-2007, 01:08 PM	#6
P_Dizzle Registered User Age: 24 Join Date: Jan 2006 Posts: 35 Location: Ny User is: OffLine	Re: rear end oh man that sucks expensive lesson iv found out i have 3:42 gears with the open limited slip i guess its called and most everyone has been telling me its probably an 8.5" rear what would happen if i changed the gear ratio i know its got something to do with gas mileage vs acceleration but i don't know which is which
	[Reply w/Quote]

08-07-2007, 01:37 PM	#7
Goran Registered User Join Date: Apr 2006 Posts: 191 Location: Ontario User is: OffLine	Re: rear end can't change the gears i think... will mess with the 4x4 if front and rear differential gear ratios are different... mine was 3.73 with a limited slip... GM uses a coo-coo clock limited slip... it winds up after slipping, then it engages... that's how mine went, nothing, nothing, then BANG, limited slip locked up and i snapped a 10,000lb tow strap... tranny is sluggish in 1st and the shift from 1st to 2nd isn't like it use to be... i doubt it's an 8.5"... mine is 7 and 5/8... stick a tape measure in there, you should be able to figure which one you have as for gear ratios the lower the gear ratio the better the gas milage and better top speed, the higher the gear ratio, the better the acceleration
	[Reply w/Quote]

08-07-2007, 01:43 PM	#8
P_Dizzle Registered User Age: 24 Join Date: Jan 2006 Posts: 35 Location: Ny User is: OffLine	Re: rear end iv been looking for a rear end all day long and its not going well at all I'm getting pretty irritated about it too haha
	[Reply w/Quote]

08-07-2007, 07:11 PM	#9
~~442typhoondude~~ Broke User. Age: 25 Join Date: Mar 2006 Posts: 1,395 Location: User is: OffLine	Re: rear end Did you replace the complete rear or just the differential? If you've just been eating diffs, your entire rear could be shot from the accident that caused the frame damage. Goran, that's ****ing horrible. Here I thought the blown up rear that came with my truck when I bought it was bad missing a few teeth.
	[Reply w/Quote]

08-08-2007, 10:25 AM	#10
Goran Registered User Join Date: Apr 2006 Posts: 191 Location: Ontario User is: OffLine	Re: rear end Quote: Originally Posted by 442typhoondude Goran, that's **ing horrible. Here I thought the blown up rear that came with my truck when I bought it was bad missing a few teeth. Oh yeah, when i break something, i break it good of course i wasn't laughing then
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08-15-2007, 08:44 PM	#11
GeorgesBlazah Slap my meat on your pita Age: 24 Join Date: Sep 2004 Posts: 7,214 Location: south jersey User is: OffLine	Re: rear end The 8.5s look more rounded than the 7.5/7.65. I saw pics somewhere...I gotta dig em up.
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