Posi rear end

[Ironangel]

Originally Posted by 88Stanger

Toms67
i believe you will need to remove the carrier unit from the rearend {includes removing both axles} which houses the "posi" or "non-posi" in it. Along with this is the ring gear. then you remove the ring gear from the non-posi unit and install the ring gear into the new posi unit. At that time i believe you will need to remove the pinon gear also only because you will need to reset all the tolerances, ie. backlash and such. i may be incorrect, so if i am wrong please someone chime in here.
I did mine, i had 307 non-posi. i bought an Eaton disc style posi, all new bearings and shims, then i removed all the parts from the rearend, cleaned it up and then took it to a guy who does rearends locally and for $250 he put it all back together. I did go with 3:42 gears, little more low end but still some upper end also.

Like Mike indicated, since Toms67 is using his existing gears he wont have to mess with removing the pinion, only the carrier. The hardest part of that aspect is removing the bearings from the old carrier and pressing them back on the posi unit. That requires a bearing splitter, a puller, and a press. Heres a list, https://www.amazon.com/dp/B01F62S2RO?psc=1
https://www.amazon.com/OTC-927-Ton-P...EDSPRH2HB78JZ1
https://www.amazon.com/Goplus%C2%AE-...ydraulic+press

[Toms67]

Well that's good news. Thank you so much for the help. The people on the forums are super. So much information. Love it.

[Ronald29609]

I just had an Eaton posi installed in my 12 bolt 67 truck differential. $650 for parts and $350 labor so $1000 +/- total. The 3.73 gears were good so we reused them.
BTW Tom of Tom's differentials passed away. Business is for sale.

[BCOWANWHEELS]

new eaton 395.00 do it yourself. no big deal

[Mudflat]

395.00 from where?

[Romo912]

Originally Posted by hdixon

I am looking to put a posi unit into my 12 bolt 1969 step side truck what be a good unit to install if anyone can help me out on this please

I didn’t know how to start a thread
Posted via Mobile Device

['68OrangeSunshine]

Originally Posted by Romo912

I didn’t know how to start a thread
Posted via Mobile Device

Go to a forum topics list like ''The 1967-1972 Chevrolet & GMC Pickups Mesage Board''

Upper left, below 2 headers and above ''Announcements'' is a capsule:
[NEW THREAD]
Push that and go. Make sure you make no typos, since it can't be edited, once posted.
But I don't know if this works from a mobile device.

[Accelo]

Yes, you don't have to mess with the pinion.

I wouldn't recommend a carrier change without replacing the pinion bearings and seal, unless they were recently replaced. You can't remove the carrier bearings without damaging them. So to save the time and frustration most just install all new bearings on the new carrier. So why not purchase all the bearings / seal and do them at the same time? Excellent time to make any pinion adjustment for preload and depth.
So now you have the equivalent of a new differential with used gears.
perfect in my book.
Rick

An old thread!

[71longbed-brew]

I went with Eaton
Changed the ratio from 3.08 to 3.42