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| Refreshing 7.25" rear end https://slantsix.org/forum/viewtopic.php?t=60511 |
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| Author: | lgu32 [ Tue Nov 29, 2016 4:50 am ] |
| Post subject: | Refreshing 7.25" rear end |
I have original 1966 7.25" rear axle with open diff and 3.55 gears. As well I have sure grip unit which I will install (or ask someone to do for me). I found NOS 3.91 gears from Ebay but they are advertised to be for 1960-61 axle. What is the difference and can I convert something to get those 3.91 gears fit to my rearend? |
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| Author: | lgu32 [ Sun Dec 11, 2016 9:12 am ] |
| Post subject: | |
I found that early pinions have been with 29 splines and late ones with 27. So I ordered 3.90 gears listed for 1966- Update: 4.10 gears coming. |
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| Author: | Killer6 [ Sat Jan 07, 2017 6:30 am ] |
| Post subject: | |
That is an interesting detail I wasn't aware of, thanks for posting! Other than having to use the appropriate 29 spline yoke, I wonder if there are other changes as well, brg. size etc., those 3.91's are probably hard to come by for such a limited app! |
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| Author: | lgu32 [ Tue Apr 18, 2017 11:48 am ] |
| Post subject: | |
I have got installed Motive 4.10 gear set and original Mopar cone type sure grip unit in to the 1966 A-body 7.25" axle. The drive shafts will not go deep enough. Seems to me that splines in the drive shatfs are not long enough. Missing something like 0.08" inch both side. Drive shafts dont seem to touch to center shaft of the SG. Do I just cut spline grooves longer about the missing lenght? Edit: No problem. Transmission specialist has measured something wrong. Shafts were in correct position. And I got a very good discount because he was sad about the problem! |
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