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Author Topic:   best way to lock up my rear end ???
mrteeshot
Dirt Maniac

Total posts: 127
posted July 09, 2005 09:32 PM  
did a search and had no luck !
I have a 7.5 " GM stock open rear.
what is the best way to lock it up ??

thanks

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racing is way too cool gave up golf for it

http://chasinracin.com/cgi-bin/showpage.pl?ID=on_my_6

nate 11
Dirt Freak

Total posts: 316
posted July 09, 2005 11:20 PM  
the best way is to buy a mini spool (but pricey). just weld the spider gears.we have run both ways only difference i seen was the $89.00. for the spool. hope this helps.......later

racer17j
Dirt Forum Champ
Total posts: 5390
posted July 10, 2005 09:23 AM  
dont waste money on a spool. everything is weak about the rear end to start with..just pull cover and weld the 4 spider gears together and it will out live any spool you can buy...

Speedway65
Dirt Freak

Total posts: 344
posted July 11, 2005 08:46 AM  
We weld 4 beads on each side spider,them reassembly it all and the 4 beads on each one lock everything together.No chance of slag in the case that way.Weld a bead on 1 skip 2then one more,do the same on the other side exactly opposite.

wermm
Dirt Maniac

Total posts: 107
posted July 11, 2005 09:25 PM  
I cut the heads off of some bolts, jammed them in there, and welded it up real good

petordragon
Dirt Maniac

Total posts: 167
posted July 12, 2005 03:32 PM  
the best way to lock up your rear end is to eat lot's of mcdonalds. LOL

MiPinto6
Dirt Maniac

Total posts: 118
posted July 12, 2005 07:14 PM  
I locked up a rearend REAL good once just by forgetting to fill it with lube. OOPS!

doubletrouble racing
Dirt Forum Racer

Total posts: 88
posted July 12, 2005 09:53 PM  
I can not believe you guys,you have disappointed me.......I have been on here for along time now and even built a car from the ground up with the help of the dirt forum.You have told me way back when over and over again...do it right the first time,even though it might cost a few more buck DO IT RIGHT.

Weld the spider gears????/ welds are known to break put the gear in that is needed for the track you run.....BUY A MINI SPOOL!!!

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Visit www.doubletroubleracingteam.com

wetwolfone
Dirt Full Roller

Total posts: 51
posted July 13, 2005 06:50 AM  
quote:
Originally posted by doubletrouble racing:
I can not believe you guys,you have disappointed me.......I have been on here for along time now and even built a car from the ground up with the help of the dirt forum.You have told me way back when over and over again...do it right the first time,even though it might cost a few more buck DO IT RIGHT.

Weld the spider gears????/ welds are known to break put the gear in that is needed for the track you run.....BUY A MINI SPOOL!!!

There's nothing wrong with welding them. Mini-spools are a waste of money, especially the cheap ones.



sc1 racing
Dirt Freak

Total posts: 419
posted July 13, 2005 11:42 AM  
running a chevy rear you cant get your desired gear, and if the weld breaks it will still be locked..

i see no need in spending extra dollars for the chevy rear, unless its disk brakes, or stronger axles..

keep it cheap, and keep it simple. we have a carrier that has been welded and on the track for 6 years in 4 diff cars..

FlyNLoIMCA17
Dirt Forum Champ
Total posts: 753
posted July 14, 2005 12:37 AM  
I've welded ALOT of rearends and never had any problems. I totally agree with SC1, the whole differential is weak to begin with so just weld it. IT WILL NOT HURT ANYTHING!!! For Chevy rears the mini-spools are $90 but for a Ford 9" they are $20 so for a 9" install a spool. For the Chevy...WELD IT!

Whitelightning
Dirt Freak

Total posts: 429
posted July 14, 2005 04:57 AM  
I run a auburn mini spool in my weak 7.5 for 5 years no failure ever, now thats not to say it wont break an axle this weekend but I keep hearing everyone say how weak the 7.5 rears are but I must have 200 races and a million miles on mine however if I could just get it to tear up lol, I could go ahead and get me a 9 inch so I can run High gear. I most certainly am not doubting the ones that say the 7.5 are weak I just think I must have been lucky up until this point!

97dirt
Dirt Forum Racer

Total posts: 94
posted July 14, 2005 05:47 AM  
Just weld it already!

Hutch5375
Dirt Maniac

Total posts: 123
posted July 15, 2005 07:02 AM  
When I welded mine I did it while it was on the car and I got a little ambitious (stupid) with the welder and welded the ENTIRE spider/carrier assembly. Just a word of wisdom from an idiot.

mrteeshot
Dirt Maniac

Total posts: 127
posted July 18, 2005 08:52 PM  
thanks for the input
since I have 2 of each gear that i use looks like the best way is to just weld em

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racing is way too cool gave up golf for it

http://chasinracin.com/cgi-bin/showpage.pl?ID=on_my_6

theslowguy
Dirt Full Roller

Total posts: 30
posted August 03, 2005 07:21 PM  
is it a bad idea to just weld the axel spiders to the carrier? a solid bead from top to bottom on both sides of the gear? all these posts talked about either welding the gears to each other or welding stuff in the teeth to keep them from rotating. the only one i have done was welded to the carrier. didn't have any problems but if it's a bad idea, don't want to do it again.

racer17j
Dirt Forum Champ
Total posts: 5390
posted August 03, 2005 07:36 PM  
The only problem with that 17j is when the axle gear breaks at the shoulder (and it will eventually) you are done for the night, and the carrier is now unusable. In my area those series 3 carriers are getting very hard to come by.

sideways
Dirt Forum Champ
Total posts: 715
posted August 04, 2005 11:23 AM  
I have heard all about metric rears are unsafe and this and that but I weld mine to the carrier and all just get "stupid" with it if you will.But on the other hand if the 3 series carriers in that area are getting hard to find then there posses another dilema.I have ran the same axle for 5 years changed right side axle once.I flipped the car and am not sure how the axle is now.We can run fords now so geuss were I am going with this.lol

racer17j
Dirt Forum Champ
Total posts: 5390
posted August 04, 2005 07:52 PM  
17j to each his own that's what makes racing so great, individuality (sp) Let's see 100 for a mini spool or 100 for a carrier hhmmm? The 3rd generation Camaro Gears will fit 7.5 rearends but I have never been able to get the 7.625 carriers to fit well at all, whats your secret?

bigdozer
Dirt Full Roller

Total posts: 54
posted August 19, 2005 09:16 PM  
buy the locker for 80 bucks and be done, its not a mini spool it is the blocks like racer17j was talking about it works and if the whole rear breaks, it won't, take it out and put it into the next one, that locker will be the only strong thing about a 7.5

bigdozer
Dirt Full Roller

Total posts: 54
posted August 19, 2005 09:17 PM  
buy the locker for 80 bucks and be done, its not a mini spool it is the blocks like racer17j was talking about it works and if the whole rear breaks, it won't, take it out and put it into the next one, that locker will be the only strong thing about a 7.5

racing33A
Dirt Forum Racer

Total posts: 97
posted August 20, 2005 06:09 AM  
Do not waste your time on the 89.00 locker unit. It will break the splined section right of the side section of the locker. Also that locker unit has two side gears with groovs cut in them, and two square blocks that fit in there to actually lock it up. What happens is that in the course of stopping and starting the blocks wear on the side gear assembly and then it gets all sloppy. Then the splines start to show cracks and then as you are leading a race for the first time in a long time the spline will break off the side gear. Which will leave you with one wheel traction and lose a race for you. I know all this first hand and can tell it aint worth the 89.00. No way, no how.
My spiders are welded with the bead in the spider gears. Since I have done that I have had no problems. It is a lot cheaper to weld them also.
I also do not understand why a rear end that I have raced(the 7.5) every weekend for 5 years and has never let me down unless I caused it to happen can be considered "weak".Now on the other hand I did try and run the 9" because it was so much "stronger". After 5 gear sets blew up I went back to the 7.5" chevy and have had no problems. Yes I guess the 9" could have been put together wrong, but 5 times. Any ways that just left a sour feeling about the 9".
Sorry about the length of the reply. Up to late and to much coffee.
racing33A

WesternAuto17
Dirt Forum Champ
Total posts: 569
posted August 22, 2005 01:49 PM  
Somebody put that 9" together wrong 5 times. My center section was assembled in 2001 and has only been out of the car to move into another housing.

I use a spool in my 9", but how do you guys weld those stock carriers? At least half the time my derby cars break the welds. I have used both my mig welder with .024 wire and an arc welder with the nickle rods with little difference.

James Ott
Dirt Maniac

Total posts: 131
posted August 22, 2005 08:03 PM  
I just finished doing one and man that oil stinks when you get it hot! I welded the four gears together on both sides, completely filling in the cavity between the gear teeth. I'm thinking the gears are made of 8620 and would require a little bit of preheat. as 8620 is not really high in carbon i tried 7018 using a stick welder. I don't think a mig welder running .024 wire would be able to heat up the gears enough to get any fusion. Hope it works were off to test tomorrow!

t_train75
Dirt Full Roller

Total posts: 50
posted August 22, 2005 09:20 PM  
not a welding expert here always have someone else do my gear welding for me but i was told to heat them up before welding and only weld them with nickle rod. is this true? they told me that otherwise they could break after welded or warp when welded. But never had any problems with welded rear ends.

sc1 racing
Dirt Freak

Total posts: 419
posted August 22, 2005 11:56 PM  
i dont even weld them solid. i just make sure they cant spin..

purestock71
Dirt Roller

Total posts: 17
posted August 23, 2005 08:37 AM  
I have used 7014 on several, have not had one break yet, some have been two years. Did have one loose a pinion bearing and that was fun to cut out and replace.

I run a stringer bead to burn the oil off and preheat then weld the gears.

sideways
Dirt Forum Champ
Total posts: 715
posted August 23, 2005 07:19 PM  
I welded just the gears twice busted both times.Took the old mig welder kicked it up on high and flipped the main copper bar to high and darn near melted the thing down.5 years and counting.Going to 9" next year but aint gettin rid of the old 7.5.

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