Sounds like rearend is bout to give out, 9inch ford?
12-21-2004, 03:56 PM
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Sounds like rearend is bout to give out, 9inch ford?
Well I got on her today and heard a whine, and it did not feel like I got the traction I normally do, I put her on my new jack (yah!) and posi looked fine, but there were metal shavings 
Bah it lasted longer than I ever expected but I know my time with my rear end is limited (haha)
I'm needing a rearend able to withstand lots of abuse, lets just say I may enter the realm of 700hp within the next year (if I keep it that long) and just curious if anyone can recommend me a bullet proof rear.
Bah it lasted longer than I ever expected but I know my time with my rear end is limited (haha)I'm needing a rearend able to withstand lots of abuse, lets just say I may enter the realm of 700hp within the next year (if I keep it that long) and just curious if anyone can recommend me a bullet proof rear.
12-21-2004, 04:05 PM
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Car: Camaro Z281991 Engine: 5.7L/350 TPI Transmission: TH700R4 ··································· Car: Acura CL 1998
Engine: 3.0L/183
Transmission: 4 spd auto/OD
for thar power level, id get a 12 bolt.
9" rears need more power to turn ...
9" rears need more power to turn ...
12-21-2004, 07:04 PM
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Car: 89 GTA
Engine: 5.7L Supercharged
Transmission: T-56
Axle/Gears: Moser 9" 3.70
Why not buy the strongest rear you can get since there priced about the same. And about that more power to turn thing does anyone have any numbers to back that up? because from what I heard from a few guys that dynoed there cars they only lose about 5 hp swaping to 9" rears from there 10 bolts.
12-21-2004, 07:37 PM
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Car: Camaro Z281991 Engine: 5.7L/350 TPI Transmission: TH700R4 ··································· Car: Acura CL 1998
Engine: 3.0L/183
Transmission: 4 spd auto/OD
Id try and keep it all chevy if its worth anything ..
http://www.moserengineering.com/mose...s.asp?CatID=28
http://www.moserengineering.com/mose...s.asp?CatID=28
12-21-2004, 07:39 PM
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I have talked to several established bracket racers and they say that dana 60/ford 9inch take 5% more power to turn than a stock 10bolt. But then again this was their opinion. 5% isn't really that much of a loss being this rear end needs to last me till I get rid of it.
12-21-2004, 08:47 PM
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Originally posted by /\/3\/\/l8l3
I have talked to several established bracket racers and they say that dana 60/ford 9inch take 5% more power to turn than a stock 10bolt. But then again this was their opinion. 5% isn't really that much of a loss being this rear end needs to last me till I get rid of it.
I have talked to several established bracket racers and they say that dana 60/ford 9inch take 5% more power to turn than a stock 10bolt. But then again this was their opinion. 5% isn't really that much of a loss being this rear end needs to last me till I get rid of it.
09-14-2005, 04:48 PM
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Car: 85 iroc & 81 sc
Engine: 357 tpi 350 4bbl
Transmission: 700r4/ richmond 4speed
Axle/Gears: 9 bolt 3.45/3.42 8.5"
WOW!!! 5% that kinda sucks that is like a 20 hp loss with 400 horse.
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09-14-2005, 07:56 PM
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Percentage losses are never accurate. It takes a fixed amount of HP to turn the diff or tranny.
20 hp loss with 400 hp. That means my 830 hp engine would lose 41.5 hp going through the same diff. I don't think so.
Parasitic driveline lose is fixed. The 10 bolt doesn't take a lot of HP to turn. The 9" and 12 bolt take a little bit more but on a high HP car, you'll never notice the difference between the 2 of them.
Since they're both roughly the same price, buy what you like. In cars like Stock Eliminator, they have to use the 12 bolt because they're not allowed to put a Ford diff under a GM.
The nice thing about the 9" is that there's only one carrier required. You buy a posi in the spline count of whatever axles you want to use then you can change your gear ratios onto the same carrier. Put some 2.50 gears for high speed highway driving or 6.50+ gears for rock crawling. There's no multi series carriers required for the gear swaps.
20 hp loss with 400 hp. That means my 830 hp engine would lose 41.5 hp going through the same diff. I don't think so.
Parasitic driveline lose is fixed. The 10 bolt doesn't take a lot of HP to turn. The 9" and 12 bolt take a little bit more but on a high HP car, you'll never notice the difference between the 2 of them.
Since they're both roughly the same price, buy what you like. In cars like Stock Eliminator, they have to use the 12 bolt because they're not allowed to put a Ford diff under a GM.
The nice thing about the 9" is that there's only one carrier required. You buy a posi in the spline count of whatever axles you want to use then you can change your gear ratios onto the same carrier. Put some 2.50 gears for high speed highway driving or 6.50+ gears for rock crawling. There's no multi series carriers required for the gear swaps.
09-14-2005, 08:57 PM
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Car: 87 IROC 92 Z-28 91 Ragtop
Engine: 5.7
Transmission: 700-r4
Originally posted by Stephen 87 IROC
The nice thing about the 9" is that there's only one carrier required. You buy a posi in the spline count of whatever axles you want to use then you can change your gear ratios onto the same carrier. Put some 2.50 gears for high speed highway driving or 6.50+ gears for rock crawling. There's no multi series carriers required for the gear swaps.
The nice thing about the 9" is that there's only one carrier required. You buy a posi in the spline count of whatever axles you want to use then you can change your gear ratios onto the same carrier. Put some 2.50 gears for high speed highway driving or 6.50+ gears for rock crawling. There's no multi series carriers required for the gear swaps.
09-15-2005, 03:06 PM
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Car: 91 Formula WS6 (Black, T-Tops)
Engine: 383 MiniRam (529 HP, 519 TQ - DD2K)
Transmission: Built '97 T56, Pro 5.0, CF-DF
Axle/Gears: 4.11 posi Ford 9"
I'm new to the 9", would someone miond telling me what has to be done to have a second carrier set up for like 3.40 to compliment my current 4.11's? An idea on what parts are necessary, approx. costs, what you have to do to change them out, etc. would be real mice..... 
09-15-2005, 03:15 PM
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Car: NCC-1701-D (docked in AZ)
Engine: impulse drive
Transmission: fusion reactors
Axle/Gears: Rescued from the Borg by my crew
Originally posted by vernw
I'm new to the 9", would someone miond telling me what has to be done to have a second carrier set up for like 3.40 to compliment my current 4.11's? An idea on what parts are necessary, approx. costs, what you have to do to change them out, etc. would be real mice.....
I'm new to the 9", would someone miond telling me what has to be done to have a second carrier set up for like 3.40 to compliment my current 4.11's? An idea on what parts are necessary, approx. costs, what you have to do to change them out, etc. would be real mice.....
Speaking of mice, did you know three mice are missing from a NJ biochemical test lab that have the bubonic plague?
What do you mean by second carrier setup. You get another set of gears and install them. Takes about 30 minutes. They dont cost much. I'm guessing 200 dollars maybe less. You keep one set of gears for racing and one for street driving. Although, I have told others before that our 95Z28 has 4.10's and we have no problem with them on the highway.
09-15-2005, 03:17 PM
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Car: 82 firebird s/e 83 Trans Am
Engine: 5.0L 305ci 4b carb.....CFI
Transmission: TH200C....700R4
Originally posted by CaptPicardsZ28
Speaking of mice, did you know three mice are missing from a NJ biochemical test lab that have the bubonic plague?
.
Speaking of mice, did you know three mice are missing from a NJ biochemical test lab that have the bubonic plague?
.
09-15-2005, 03:20 PM
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Car: 91 Formula WS6 (Black, T-Tops)
Engine: 383 MiniRam (529 HP, 519 TQ - DD2K)
Transmission: Built '97 T56, Pro 5.0, CF-DF
Axle/Gears: 4.11 posi Ford 9"
OK on the mice.... jeez... rag a guy for his typos why don't ya 
Guess I'll have to learn how to pull and install/set-up gear sets....
THe reason is for fuel economy on highway trips. My old 3.42 10-bolt RPMs were noticeably lower at 70MPH than the 4.11's are with my T-5. Your T-56 makes a bit of a difference... LOL
Guess I'll have to learn how to pull and install/set-up gear sets....
THe reason is for fuel economy on highway trips. My old 3.42 10-bolt RPMs were noticeably lower at 70MPH than the 4.11's are with my T-5. Your T-56 makes a bit of a difference... LOL
09-15-2005, 03:24 PM
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Car: NCC-1701-D (docked in AZ)
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Transmission: fusion reactors
Axle/Gears: Rescued from the Borg by my crew
Originally posted by vernw
OK on the mice.... jeez... rag a guy for his typos why don't ya
Guess I'll have to learn how to pull and install/set-up gear sets....
THe reason is for fuel economy on highway trips. My old 3.42 10-bolt RPMs were noticeably lower at 70MPH than the 4.11's are with my T-5. Your T-56 makes a bit of a difference... LOL
OK on the mice.... jeez... rag a guy for his typos why don't ya
Guess I'll have to learn how to pull and install/set-up gear sets....
THe reason is for fuel economy on highway trips. My old 3.42 10-bolt RPMs were noticeably lower at 70MPH than the 4.11's are with my T-5. Your T-56 makes a bit of a difference... LOL
09-15-2005, 03:26 PM
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Car: NCC-1701-D (docked in AZ)
Engine: impulse drive
Transmission: fusion reactors
Axle/Gears: Rescued from the Borg by my crew
Originally posted by 82knightrider
thats some scary Schit
thats some scary Schit
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