Took the Buick out for quick ride. Did hole shot and bang, rear end out.:ball: I took it apart and noticed that I just broke my spider gears in this rear end. (see pictures) Ring and pinion look good still. Can I just put in spider gears and go! And big question will I find any before winter hit again. It just now getting nice here Wisconsin, It been a long Winter. Thanks for any help, Mark P.S. Jim Monzar still waiting for your call.ray: http://s1234.photobucket.com/albums/ff413/MarkCamalieri/
I can't help you with advice, but looking at those pictures reminds me of when I stripped every tooth off 2nd gear in the cluster gear in my camaro which had a BW T-10 in it. I learned how to use my clutch a little better after that.
][/INDENT] No clutch shift here, normally it just breakes tires, not gears. My hat goes off to Toms rollers & starter, TA Headers, Carmen Heads big valve head and his cam with Cliffs Quaderjet rebuilt. It really help the nailhead to wake up. I did last me 5 years.:3gears: Hate to put back in stock 307 posi. Any one want trade rears!!:laugh:
Sorry to see you're having problems. I hope Monzaz can come up with the parts and get you up and running again. Mike
It looks like you did not get any pieces in the ring and pinion. Just rebuild (clutches and springs) and replace the spiders. <?xml:namespace prefix = o ns = "urn:schemas-microsoft-comNelson<o></o>
Ok you broke the spider gear at least on one side. and a side gear looks to be done also. There are NO PARTS for these posi rears. The best we can do is match up spiders from another diff...BUT THE SIDE GEARS IS THE BIG TROUBLE here. WE may or may not beable to get this if it matches up with some other posi. IF not it is DONE! The unit is a EATON posi unit. They only used this unit in the 64 65 rears most were the POWER LOCK which is the the four pinion unit and is bolt together unit. (reference pictures)
Good Morning Monzaz, Ok then if you can find something that would be great, keep me posted on your finding with spiders. Any option on changing over 308Posi with lower gears? I had a picture of that unit also posted.
Jim , I notice the drop unit you shown as reference picture in posting is not the same carrier style as 342 i broke. But that one like looks like the same as the 307 stock unit I have. What am i missing here? The one I broke is from a 65 RIV 342 posi. The other one is 65 Wildcat 307 posi which looks like your ref picture. But both are posi, and same year, but look totaly different.
Mark, there were 2 different units used. Better to let Jim explain... Would the spider gears be the same in a non posi?
Interesting your 3.07 is the square looking bolt together, I have not seen that. I have a 3.42 from a 65 Riv GS that looks like yours, and the 3.07's from a couple Wildcats look like that too. My 4-sp cars all have the square looking bolt together type that Monzaz posted...they are heavier duty. I found a set of 3.91's on that carrier too. :beers2:
Perfect Ted! Ok then, just sell me the 391 gears for my good 307 posi, which would give me a resaon to try one of them gear vendors over drive. Sounds like fun, Ya think.....!!
Boy, GOTTA love the forums... I will still check the carrier breaks on the 3.07 3.42 etc. I have a BRAND NEW NOS set of 3.42 GM gears here...BUT they are NOT cheap. 459.00 is the price. NOT USED, NEW. I have a 3.07 posi and a 3.42 posi. The 3.42 posi I have AGAIN has spider gear issues and the 3.07 was sitting and someone started to remove yokes etc. SO it needs to be checked out. I just have not had time with SPRING order on diffs swamping me. I will do what I can to get you answers. Jim
I know someone who has those spiders. Problem is they are $125.00 ea. + shipping. Side gears are NOT AVAILABLE ANYWHERE!!!!! I really hope Jim can match something up.
Whoops, should have looked at pictures 1st. Jim may just be able to come up with something as this is the newer style. What I know of is for the older bolt held together Eaton. But, I DO have a brand new case that is exactly like you have. No internals, for 3.42 or higher gears. Cost me over $300.00 in 1968. Normally the reason the spiders break is because the posi unit was slipping & only one wheel was turning. So the posi needs to be gone through also.
Hi Tom, I have the newer style, I like the sound of that! Maybe some hope after all, but 1 question for you, Could I use the good 307 older posi Eaton I have, and swap over 342 gears?? I thought you just had to add a shim behind the ring gear ? I measured the ring on the 307 and it is thicker and the newer style. (342 newer) http://s1234.photobucket.com/albums/ff413/MarkCamalieri/ (307 older) http://s1234.photobucket.com/albums/ff413/MarkCamalieri/307 Posi rearend/
Spiders break because of BOTH worn clutch pack and spiders become out of spec with the other side gears...(meaning too much distance between contact) They start to climb each other then bind and shatter. Other reason is TOO MUCH torque ...The spiders are JUST TOO small of a design for the size and weight of the car and its torque output. NOT much we can do about that.... ???? THe ring gear is USUALLY NEVER an issue.... The failure in design has always been spider gear size.
Jim, Could I use the good 307 older posi Eaton I have, and swap over 342 gears?? I thought you just had to add a shim behind the ring gear ? I measured the ring on the 307 and it is thicker and the newer style.
Jim, the only thing I can tell you is you would have to try it. I know for sure the older gears can be used in a '71 Riv. because it has been done. I proved that probably a good 8 or so years ago. I know on the posi case I have for the style housing you have is I ordered one for 3.42 & up gears for the 3.90's & 4.45's I had. It was special ordered & waited over 8 weeks for it to come in & it was the WRONG one for my application. It was special order so couldn't be returned.
Just a follow up, that Brad from FabCraft called me back from Texas, said he thinks he can help me furnish parts for older style drop outs (9.3 3rd members) after reviewing pictures I sent him. He ask me box up all ring, pinon, spider, and side gears along with clutch pack. He said they have some options avilable. I shiped him everthing today and he will let me know early next week what they can furinsh. I will keep you posted and only hope he right for us big Buick guys. Let you early next week on there findings. Thanks for all your insight.
