8.8 enough for 390rwh

99STEEDA · May 3rd, 2008, 02:52 PM

Hi, New to the site! Looking for a couple opinion's. I have a 99 STEEDA Mustang (GT) with a ProCharger at 390 rwh,3.73's, 305-35-18 Nitto drag radial's. Will the 8.8 hold it or will i need to upgrade carrier and axles? On an ocasion i have a problem going in to third hard, it feels like it hits a wall (no grind juston't go in on the first try). It has a short throw shifter is it just the shifter not overcoming the syncro and i just need to shift harder? It is a street car but i just want to let her go once in a while with out breaking it. Thanks, Kevin

Racinjason81 · May 12th, 2008, 10:49 PM

you should have the axle tubes welded for one you should install a 31 spline posi and axles and a T/A girdle you also may want to add a Swarr bar

BUGMAN · May 13th, 2008, 12:03 AM

Not sure of your weight but in our cars we have ran them well into the 6's (in the 1/8th) with factory 8.8's in 3,100 # cars. Not a real smart thing to do but we have never broken an axle.

Once we get a car into the 6's the first thing on our upgrade list would be the axles to either a 28 spline hardened with C-clip eliminators or something better. If we are looking for a lot more power and then we go 33 spline spooled Moser with C-clip eliminators and rear girdle. Being a DD I would suggest hardened axles with ARP studs, C-clip eliminator, support girdle and weld the tubes like already suggested.

As far as the carrier goes... it will hold more than most think with the proper axles, welded tubes and proper set up.

99STEEDA · May 20th, 2008, 10:37 PM

When welding the tubes do they need to be welded all the way around or can you get by with just the front and back on each side and what is the purpose of the C clip eliminator's? A knowledgeable pereson told me the stock carriers weak point is the spider gear's so if that would break it may not be to bad not like a broken axle that would clean out the fender and do a lot of other dammage. I am thinking for now axles, Weld tubes, Gear's and bearing's and clip eliminator's if needed. I weighed the car last summer and i think it was 3,200 with me in it so about 3,000 with no driver. Thanks, Kevin

BUGMAN · May 24th, 2008, 03:43 PM

The C clips are what hold your axles in. If your axle breaks then it can walk out and possibly do fender or other damage. C-clip eliminators minimize the possibility of that happening because they hold the axle in externally, directly behind your brake backing plate to be exact. I have several with them installed on them so next time I get one on the lift I will get a few shots to show ya.

99STEEDA · May 24th, 2008, 11:12 PM

Thanks, I know how the C clips work and what they do and i know what the 9" was like. Just don't know if it is nessary with my setup. Do you have to weld flanges on to the housing to hold the axles in or does the kit work with what is there also what does the kit cost? I am thinking of just going with better axles when i get to it. Thanks, Kevin

May 3rd, 2008, 02:52 PM	#1
99STEEDA Newbie Join Date: May 2008 Posts: 3	8.8 enough for 390rwh Hi, New to the site! Looking for a couple opinion's. I have a 99 STEEDA Mustang (GT) with a ProCharger at 390 rwh,3.73's, 305-35-18 Nitto drag radial's. Will the 8.8 hold it or will i need to upgrade carrier and axles? On an ocasion i have a problem going in to third hard, it feels like it hits a wall (no grind juston't go in on the first try). It has a short throw shifter is it just the shifter not overcoming the syncro and i just need to shift harder? It is a street car but i just want to let her go once in a while with out breaking it. Thanks, Kevin

May 12th, 2008, 10:49 PM	#2
Racinjason81 Hardcore Enthusiast Join Date: Feb 2007 Location: New jersey Posts: 1,198	you should have the axle tubes welded for one you should install a 31 spline posi and axles and a T/A girdle you also may want to add a Swarr bar __________________ Speed kills drive an import and live forever. 1991 LX 5.0 H/B 1990 T-BIRD SC

May 13th, 2008, 12:03 AM	#3
BUGMAN Regular Join Date: May 2008 Location: TRAILER PARK Posts: 90	Not sure of your weight but in our cars we have ran them well into the 6's (in the 1/8th) with factory 8.8's in 3,100 # cars. Not a real smart thing to do but we have never broken an axle. Once we get a car into the 6's the first thing on our upgrade list would be the axles to either a 28 spline hardened with C-clip eliminators or something better. If we are looking for a lot more power and then we go 33 spline spooled Moser with C-clip eliminators and rear girdle. Being a DD I would suggest hardened axles with ARP studs, C-clip eliminator, support girdle and weld the tubes like already suggested. As far as the carrier goes... it will hold more than most think with the proper axles, welded tubes and proper set up. __________________ You haven't failed until you stop trying.

May 24th, 2008, 03:43 PM	#5
BUGMAN Regular Join Date: May 2008 Location: TRAILER PARK Posts: 90	The C clips are what hold your axles in. If your axle breaks then it can walk out and possibly do fender or other damage. C-clip eliminators minimize the possibility of that happening because they hold the axle in externally, directly behind your brake backing plate to be exact. I have several with them installed on them so next time I get one on the lift I will get a few shots to show ya. __________________ You haven't failed until you stop trying. Last edited by BUGMAN : May 24th, 2008 at 03:46 PM.

May 20th, 2008, 10:37 PM	#4
99STEEDA Newbie Join Date: May 2008 Posts: 3	When welding the tubes do they need to be welded all the way around or can you get by with just the front and back on each side and what is the purpose of the C clip eliminator's? A knowledgeable pereson told me the stock carriers weak point is the spider gear's so if that would break it may not be to bad not like a broken axle that would clean out the fender and do a lot of other dammage. I am thinking for now axles, Weld tubes, Gear's and bearing's and clip eliminator's if needed. I weighed the car last summer and i think it was 3,200 with me in it so about 3,000 with no driver. Thanks, Kevin

May 24th, 2008, 11:12 PM	#6
99STEEDA Newbie Join Date: May 2008 Posts: 3	Thanks, I know how the C clips work and what they do and i know what the 9" was like. Just don't know if it is nessary with my setup. Do you have to weld flanges on to the housing to hold the axles in or does the kit work with what is there also what does the kit cost? I am thinking of just going with better axles when i get to it. Thanks, Kevin

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