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Re: 8 3/4 spool with stock axel bearings.. [Re: fourgearsavoy] #261991 03/23/09 10:35 PM 03/23/09 10:35 PM
Joined: Dec 2003 Posts: 5,314 Carstairs, Alberta, Canada dave571 master
dave571 master Joined: Dec 2003 Posts: 5,314 Carstairs, Alberta, Canada	Seems odd that the obvious safety issue of stock axles in a spool is not a concern, but green brg strength is. Assuming it's drifting or dirt racing, How would either make any more side load? Theres LESS side load in a skid, than there is when there is traction going around a corner. In any case, if greens aren't goign to cut it in your world, then throw a chunk of old axle or round stock in there as a spacer, and trim up the axle ends if you have too. OR just weld up the side gears in a stocker then you still have the thrust block. Without aftermarket axles, it's all just a crap shoot whether it will live anyway, so fill your boots

Re: 8 3/4 spool with stock axel bearings.. [Re: DoctorDiff] #261992 03/23/09 10:40 PM 03/23/09 10:40 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Sounds like he is building a demolition derby car. Take the 1.5" long thrust block out of a stock differential, and slip it inside the spool before you install the axles. I just looked at his screen name....LOL

Re: 8 3/4 spool with stock axel bearings.. [Re: MR_P_BODY] #261993 03/23/09 11:59 PM 03/23/09 11:59 PM
Joined: Mar 2008 Posts: 29 Alberta Canada D Demoman OP member
Demoman OP member D Joined: Mar 2008 Posts: 29 Alberta Canada	Yeah you got it .. Its a demolition derby car.. I do a full season just like a dirt track racer or drag racer.. I know a lot of people look at is as hillbilly or such and don't take it seriously .. but you would be surprised at the guys that take it seriously and the level of competition.. So now with that out of the way.. A lot of us seasoned drivers hit the tires to take out a opponents mobility.. Such as why lateral force tolerance is important.. I have welded in the past with out a problem.. but this year i bought a new set of 4.30's so i did not want to take the chance on busting them up in case the spiders destructed.. So it leaves me with these 3 questions.. What would work better a old axle or the 1.5" long thrust block out of the stock differential? And What is the proper way to adjust the axle end play, do the axle butt up tight against the spacer? Do i want some play between the spacer and axels in my application? Thanks alot everyone.. P.S I also am restoring a 69 coronet so dont hate me too much! haha

Re: 8 3/4 spool with stock axel bearings.. [Re: Demoman] #261994 03/24/09 12:13 AM 03/24/09 12:13 AM
Joined: Nov 2004 Posts: 2,825 Sk. Canada RemCharger master
RemCharger master Joined: Nov 2004 Posts: 2,825 Sk. Canada	What about axles out of another car that are .75 of an inch longer or so? As far as end play, about .010" on both sides is good.

Re: 8 3/4 spool with stock axel bearings.. [Re: RemCharger] #261995 03/24/09 12:22 AM 03/24/09 12:22 AM
Joined: Mar 2008 Posts: 29 Alberta Canada D Demoman OP member
Demoman OP member D Joined: Mar 2008 Posts: 29 Alberta Canada	haha why do you think i should use longer axles ? what is the purpose of axle adjustment and spacer? will the axle walk out or in? thanks again guys

Re: 8 3/4 spool with stock axel bearings.. [Re: Demoman] #261996 03/24/09 08:14 AM 03/24/09 08:14 AM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	For the same reason I suggested ordering longer axles. To compensate for the space being absent. Here to help you adjust the end play: http://www.moparts.org/Tech/Archive/axle/12.html Clean it, if it's Dirty. Oil it, if it Squeaks. But: Don't fix it, if it Works!

Re: 8 3/4 spool with stock axel bearings.. [Re: Demoman] #261997 03/24/09 12:35 PM 03/24/09 12:35 PM
Joined: Jan 2003 Posts: 75,005 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,005 U.S.S.A.	Quote: gotcha.. so even if i use a piece of round stock wadded up with tape so it fits snug? How wide should i go? how much end play should i have? how much gap between the spacer and the axel end should i have? Keep in mind im building this for extreme laterial loads and shock... thanks again It needs to FLOAT , the stock thrust block float .

Re: 8 3/4 spool with stock axel bearings.. [Re: Demoman] #261998 03/24/09 12:38 PM 03/24/09 12:38 PM
Joined: Jan 2003 Posts: 75,005 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,005 U.S.S.A.	Quote: haha why do you think i should use longer axles ? what is the purpose of axle adjustment and spacer? will the axle walk out or in? thanks again guys the purpose is to keep the bearing in the cone and basicly preloads , though there is side to side movement, the bearing . It's a demo car , weld the spiders or use greens , you are running on dirt , no big deal and if the bearing breaks so what ?

Re: 8 3/4 spool with stock axel bearings.. [Re: JohnRR] #261999 03/24/09 04:06 PM 03/24/09 04:06 PM
Joined: Nov 2004 Posts: 2,825 Sk. Canada RemCharger master
RemCharger master Joined: Nov 2004 Posts: 2,825 Sk. Canada	Quote: Quote: haha why do you think i should use longer axles ? what is the purpose of axle adjustment and spacer? will the axle walk out or in? thanks again guys the purpose is to keep the bearing in the cone and basicly preloads , though there is side to side movement, the bearing . It's a demo car , weld the spiders or use greens , you are running on dirt , no big deal and ""if the bearing breaks so what ? "" Your car is crippled and you lose? I think thats the reason for not wanting your bearing to break.

Re: 8 3/4 spool with stock axel bearings.. [Re: RemCharger] #262000 03/24/09 07:51 PM 03/24/09 07:51 PM
Joined: Mar 2008 Posts: 29 Alberta Canada D Demoman OP member
Demoman OP member D Joined: Mar 2008 Posts: 29 Alberta Canada	exactly ... thanks guys..

Re: 8 3/4 spool with stock axel bearings.. [Re: Demoman] #262001 01/24/11 09:08 PM 01/24/11 09:08 PM
Joined: Mar 2008 Posts: 29 Alberta Canada D Demoman OP member
Demoman OP member D Joined: Mar 2008 Posts: 29 Alberta Canada	Anyone have a source for factory replacement bearings? As for a spacer i ended up using the factory spacer from the old 3rd member , loaded it up the spool with grease so it wouldnt slip out .. thanks dave

Re: 8 3/4 spool with stock axel bearings.. [Re: Demoman] #262002 01/24/11 10:20 PM 01/24/11 10:20 PM
Joined: Jul 2010 Posts: 791 Bama Randy.. super stock
Randy.. super stock Joined: Jul 2010 Posts: 791 Bama	factory bearing is a set#7

Re: 8 3/4 spool with stock axel bearings.. [Re: Demoman] #262003 01/25/11 12:45 AM 01/25/11 12:45 AM
Joined: Aug 2003 Posts: 43,173 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,173 Bend,OR USA	there are two theory on tapered Timken roller axle bearings used in stock 8 3/4 rear ends, the later ones(1965 and on) used the adjusters to set the axle end play from .003 to .010. I have seen Timken tapered roller bearings set up with a light preload, like fronnt wheel bearings either way will work How are your rear axle bearing and end play adjusters holding up now? As already said the axles will break right at the end of the spline that is engaged in the spool or posi, been there done that twice(drivers side is first to go ). Paint the stripes on both axles now, check the left one(drivers side) frequently I have seen a stock axle twist almost two complete spines before shearing(breaking) It does make the car go left when that side(left or drivers side) quits driving Last edited by Cab_Burge; 01/25/11 12:46 AM. Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: 8 3/4 spool with stock axel bearings.. [Re: Demoman] #262004 01/25/11 02:17 AM 01/25/11 02:17 AM
Joined: Dec 2008 Posts: 415 Peru cbarracuda mopar
cbarracuda mopar Joined: Dec 2008 Posts: 415 Peru	Do not use end play, let the two bearings absorb the impact. Don�t worry about breaking axles, your tires don�t have the grip to do that.

Re: 8 3/4 spool with stock axel bearings.. [Re: cbarracuda] #262005 01/25/11 03:46 AM 01/25/11 03:46 AM
Joined: Mar 2008 Posts: 29 Alberta Canada D Demoman OP member
Demoman OP member D Joined: Mar 2008 Posts: 29 Alberta Canada	Axels and Bearings are holding up great.. Havent broke an axel yet. I have however bent some axels.. The tires I use are 10 ply quite tall 7.00 15 and have 3/4 of mud grip these rubber are about 65- 70 pounds each.. I use a 4.30 and 4.56 gear ratio.. I only way I think I could break an axel is doing forward to reverse drops or getting hit on the tire when im on the throttle.. The main reason to these bearings over the roller ones is if an axel breaks I dont want it to walk out of the housing through the bearing.. Which would probably cause me to lose the race.. Thanks for all the input guys .. it always nice to have something to talk about in the winter season

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