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Expert 5K+
Posts: 8947
     
Location: WHEELING,WV.>>>HOME OF WWVA | ok guys . i have a 60 , 8 3/4 sure grip wanting to install it in an E-body housing . only thing is , axles are too long by hitting the thrust block . i was under the
impression that all pre 64 sure grips were the same as post 64 sure grips (only the pre 64 open were different). what am i not grasping here . is there an
easy fix or am i just suckin dead air . -----------------------------------------------------later
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Expert 5K+
Posts: 8947
Location: WHEELING,WV.>>>HOME OF WWVA | forgot to say , i've got green bearings ----------------------------------------------later
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Expert
Posts: 2519
Location: central Illinois | Aren't "green bearings" only for drag racing? |
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Veteran
Posts: 255
Location: Dunnellon, FL | You don't need the thrust button with green bearings. |
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Expert
Posts: 3775
Location: NorCal |
Starting in '64 all thrust blocks are 1 1/2" wide. Sure-Grips prior to that had the 1 1/2" block but the pre-'64 open differential used a 1 1/4" block...thus the non Sure-Grip axles are 1/8" longer. If they're factory axles they should clear the thrust block (just barely) with the Green bearings.
If the axles won't go in are you sure it's because of the thrust block? The Sure-Grip has a pair of side gears that can become misaligned so the inner splines don't line up. Can usually see this by eyeball. |
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Expert 5K+
Posts: 8947
Location: WHEELING,WV.>>>HOME OF WWVA | the axles (factory) go in except the last 1/8 or so . last night i took out the thrust block but haven't got back to it yet but here in a little bit i will . everything else looks to be great inside the pig and
should it's only got @ 35K on it . only thing is , i installed the old dirty pig back in as a get er done thing . so now i'll be using more gaskets i have few of -----------------------------------------later and thanks guys |
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Expert 5K+
Posts: 9650
Location: So. Cal | I have reused 8 3/4 gaskets many times before (swapping gears!) with 100% success as long as they were installed no more than 2-3 years before. But I always use a very thin layer of silicone sealant on both sides of them and that helps to keep them from ripping when I remove the pig. |
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Temporarily suspended to cool off
Posts: 316
| 60 dart - 2015-07-02 12:45 PM
the axles (factory) go in except the last 1/8 or so . last night i took out the thrust block but haven't got back to it yet but here in a little bit i will . everything else looks to be great inside the pig and
should it's only got @ 35K on it . only thing is , i installed the old dirty pig back in as a get er done thing . so now i'll be using more gaskets i have few of -----------------------------------------later and thanks guys
So a freind and I use to race a 67 baracuda, we would drive the car to the track on one pig, and at the track swap in a spool that was in another pig. We would get 10 to 15 swaps back and forth on a gaskette. |
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Expert 5K+
Posts: 8947
Location: WHEELING,WV.>>>HOME OF WWVA | like i said earlier i removed the thrust button/block and all is well . i did use the pigs gasket over again with rtv again . the inner axle gaskets are what i was mainly referring to . there aint
no saving them in any case , foam gaskets . what the exact differences are between the 657 and the newer 8 3/4's i don't but removing the thrust block worked ---------------------------later |
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Expert
Posts: 1906
Location: Ontario, Canada | 57chizler - 2015-07-02 1:52 PM
Starting in '64 all thrust blocks are 1 1/2" wide. Sure-Grips prior to that had the 1 1/2" block but the pre-'64 open differential used a 1 1/4" block...thus the non Sure-Grip axles are 1/8" longer. If they're factory axles they should clear the thrust block (just barely) with the Green bearings.
If the axles won't go in are you sure it's because of the thrust block? The Sure-Grip has a pair of side gears that can become misaligned so the inner splines don't line up. Can usually see this by eyeball.
You seem to get all this stuff correct all the time! What was/is your job? How can anyone have all the answers you have?!
Greg |
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Expert
Posts: 3775
Location: NorCal | 60 dart - 2015-07-02 9:13 PM
what the exact differences are between the 657 and the newer 8 3/4's
The 657 is dimensionally the same as the later 741. I've been told that the only difference is the material, the 657 is cast steel while the 741 is cast iron...ditto for the 985/742.
The potential thrust block interference is the reason I don't like the Greens but, when they do interfere, it's usually only a few thou. 1/8" make me think the axles are incorrect for the housing. |
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Expert 5K+
Posts: 8947
Location: WHEELING,WV.>>>HOME OF WWVA | after i removed the thrust blocks and put everything back together it didn't sit right with me . so i took it down again and put the blocks back in . this time though i jiggled the pinion/rear universal as
i did the last time and it went back together as it should with the blocks inside . i looked inside the axle hole before i started the block re-install nothing looked out of place . so now everything is back
in place bolted to the new 2" lift leaf springs , new brake lines , all new brake parts , most all bare parts painted , ordered new air shocks that will probably only get low pressure . even though the
new leaf are supposed to be 2"lift . i don't think it's actually going to give said lift but i will see shortly . first order will be to bleed the brakes on wednesday when i have help------------------------later |
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Expert
Posts: 3575
Location: Netherlands | Make real sure the green bearings aren't installed under a (side) preload, as they do will wear out quickly that way.
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Expert 5K+
Posts: 9650
Location: So. Cal | Since you're running green bearings, you might as well have left the blocks out, but as long as there is no interference, you should be good to go.
They say that air shocks need to be filled with a minimum amount of pressure or else they will fail prematurely. Personally, I think they are a pain in the neck and I avoid them when I can. I prefer to use the spring-assisted overload shocks instead. You might have better luck with them, and with less hassle.
I bought new heavy-duty leafs from Eaton Detroit spring for my wagon and couldn't be happier with them. They came with the perfect amount of lift & overload capacity that I requested. The only unhappy thing was the shipping cost.
Herman, how could you end up with a side pre-load on the bearing? It seems only possible if the housing is bent. |
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Expert
Posts: 3775
Location: NorCal | 60 dart - 2015-07-14 1:29 AM
this time though i jiggled the pinion/rear universal as
i did the last time and it went back together as it should with the blocks inside .
See my previous comment about the 2-piece side gears in the SG. It doesn't take much spline misalignment to stop the axles from going in all the way. |
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a 60 , 657 sure grip qiestion
