Author Topic: 8" rear end problems  (Read 5344 times)

mustangwannabe302

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8" rear end problems
« on: January 25, 2009, 12:32:05 AM »
for cost reasons i dont want to upgrade to a nine inch rear end i want to know what mods i can make to beef it up a bit like newer axles or something if it helps it has a c-6 trani and a 302 bored .40 over no torque converter yet need help on that one too thanks!!!!

Soaring

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Re: 8" rear end problems
« Reply #1 on: January 25, 2009, 03:18:57 AM »
About the only thing you can do is to put in some gears such as 3:55's.   What gears does it currently have?  You say you don't have a torque converter?  Are you sure you know what you are talking about? 

mustangwannabe302

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Re: 8" rear end problems
« Reply #2 on: January 25, 2009, 08:10:26 AM »
The c-6 isn't in yet because I haventchosen the type of stall yet and its just the stock 2.75 gears in it I am very new at mechanics I know basics that's about it

66GTKFB

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Re: 8" rear end problems
« Reply #3 on: January 25, 2009, 12:48:06 PM »
Your post are a bit vague - you haven't said what year car (I see 68 off to the left side) and you seem to have a transmission model problem. If you have a 68 that came with a 289 or a 302, you would have a C4 transmission, not a C6. The way to tell is C4 types have a separate bell housing and C6 types are one piece.
Jim

mustangwannabe302

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Re: 8" rear end problems
« Reply #4 on: January 25, 2009, 01:08:14 PM »
it came with a straight six and a c4 transmission..i apologize for being vague i am very new at posting on forums i got the c-6 from a 1982 ford f-150 and had it rebuilt with all new gaskets i know what i have to do to fit the transmission but before i put it in i want to know what the best stall and gear ratio would be for a street rod.  im not to sure on the duration and lift on the cam, but it is an performance cam.  i wanted to know if i could replace anything inside the 8" housing besides the gears to make it handle the v-8 better.

Soaring

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Re: 8" rear end problems
« Reply #5 on: January 25, 2009, 04:11:45 PM »
That 8" will handle all the power that 302 can make.  You might want to upgrade to 3:55 gears in it though.  I wouldn't go any higher if you want a street machine and not a track machine.  A 9" rear is overkill for a 302, so don't worry about that rear.
Now, if it still has the 7 1/4" rear in it from the 6 banger, then that is going to have to be replaced along with the front suspension. 

mustangwannabe302

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Re: 8" rear end problems
« Reply #6 on: January 26, 2009, 01:05:19 AM »
I am very happy yet now very worried about the info my dad just gave me. He tells me my rearend isn't the one that originally came in the car..how do I know the size? Is there a certain way to measure it if so how? I have been searching the web for answers for the past 2 hours to avoid asking anymore you guys anymore questions sorry

Soaring

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Re: 8" rear end problems
« Reply #7 on: January 26, 2009, 06:14:33 AM »
If it is not the one that came in the car, then you are miles ahead, because that weak 6 banger rear end cannot handle the V8 torque.  Hey, this site is designed to talk about Mustangs.  We enjoy the discussions, so don't apologize for asking questions.  Now, go to the classic section on here, and at the top you will see a FAQ section.  I have gathered a ton of information that will help answer most of your questions so you don't have to surf.  I have it listed in various sections, so go to the differential section and you will see the information you are looking for.  If it is a 9" rear, it will have the hump, but if it is an 8" rear it will be round. 

mustangwannabe302

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Re: 8" rear end problems
« Reply #8 on: January 26, 2009, 08:24:55 AM »
Thanks alot

 

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