1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

the weakest link

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Old 06-24-08, 08:00 PM
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the weakest link

Ok, I know that when you are planning on alot mmore power you have to beef up the drive train. stronger tranny, drive shaft and axels.
my question is on the '85 GSL rear end what si the weakest link?
if I go to the Re-Speed Moser Axles I get stronger shafts. Will they handle 350rwhp? I'm thinking the ring gear is the week point, so no?
I want to do the T2 BB kit, but also plan on more power.

thanks
Old 06-28-08, 01:06 PM
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Brakes first then power. No point in going really fast if you can't stop. Those Moser axles should be more than strong enough for 350HP. Email billy at Re-Speed, he can tell you for sure. The rear end of the GSL is actually pretty stout, but look into a Grannys Speed Shop Ford 8.8 rearend conversion.
Old 06-29-08, 08:57 PM
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Originally Posted by spottedfrog
Ok, I know that when you are planning on alot mmore power you have to beef up the drive train. stronger tranny, drive shaft and axels.
my question is on the '85 GSL rear end what si the weakest link?
if I go to the Re-Speed Moser Axles I get stronger shafts. Will they handle 350rwhp? I'm thinking the ring gear is the week point, so no?
I want to do the T2 BB kit, but also plan on more power.

thanks
the wakest link in the rear end is the axles, the ring and pinion, then the housing itself.. we blew the main caps out of 5 3rd members before upgrading the rear end to an 8.8


get an 8.8 out of a cobra and its got disk brakes already
Old 06-29-08, 10:37 PM
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I’m doing the upgrade to the 8.8 right now, big diff-erence, the 8.8 axels are huge in comparison to the rx's and with out a doubt stronger.

My 8.8 came out of a 2000 explorer with disk brakes for $200. I bought granny’s brackets for the conversion for $195 and I’m just now putting them on.
Old 06-30-08, 05:21 AM
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Originally Posted by dread390
I’m doing the upgrade to the 8.8 right now, big diff-erence, the 8.8 axels are huge in comparison to the rx's and with out a doubt stronger.

My 8.8 came out of a 2000 explorer with disk brakes for $200. I bought granny’s brackets for the conversion for $195 and I’m just now putting them on.
your going to have to narrow the rear end if im not mistaken
Old 06-30-08, 05:32 AM
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over all its 2" bigger, i can work with that.
Old 07-01-08, 01:08 AM
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Thanks for the replies. I'm planning on upgrading the brakes first. thats why I want to know if the Mosers will be fine when I up reade the rest I don't want to repeat mods. The 8.8 is cool but I'll stick with Moser if I can get away with it.
Some good info here
Old 07-01-08, 02:20 AM
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Originally Posted by spottedfrog
Thanks for the replies. I'm planning on upgrading the brakes first. thats why I want to know if the Mosers will be fine when I up reade the rest I don't want to repeat mods. The 8.8 is cool but I'll stick with Moser if I can get away with it.
Some good info here
how much are the mosier axles?
Old 07-01-08, 02:39 AM
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jaidedeye: Axles are around 300, but they dont need mounts welded or shortened
also I don't forsee going over about 350hp. I'm thinking they will work
Old 07-01-08, 03:46 AM
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It's all about how much you abuse it and if you will be drag racing. I've been running a 13BT with about 300rwhp on the standard drivetrain for over 2 years now. Gearbox has a bit of a whine but otherwise works perfectly. The standard Series 3 LSD with the left casing machined for more crush hasn't missed a beat. If and when something breaks then I will upgrade.
Old 07-01-08, 12:23 PM
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Originally Posted by spottedfrog
jaidedeye: Axles are around 300, but they dont need mounts welded or shortened
also I don't forsee going over about 350hp. I'm thinking they will work
not a bad price...def something i will look into as well
Old 07-01-08, 08:02 PM
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680RWHP12A: how much HP were you putting through your axles when you started blowing the main caps?
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