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8 3/4 ring and pinion , suregrip remove and install
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60 dart
Posted 2018-09-22 1:58 PM (#570575)
Subject: 8 3/4 ring and pinion , suregrip remove and install



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Location: WHEELING,WV.>>>HOME OF WWVA
anyone here that does their own? i'm going to give it a try!,,,,,,,,,, i think 3:73 !---------------------------------------------------later

Edited by 60 dart 2018-09-22 1:59 PM
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57chizler
Posted 2018-09-22 5:30 PM (#570584 - in reply to #570575)
Subject: RE: 8 3/4 ring and pinion , suregrip remove and install



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Location: NorCal
My advice would be to follow the FSM to the letter. Bearing removal/installation requires some dedicated equipment and you will probably have to fabricate a tool for the carrier bearing adjusters.
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mstrug
Posted 2018-09-22 5:40 PM (#570585 - in reply to #570575)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



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Location: Newark, Texas (Fort Worth)
Here is a good article:

http://moparconnectionmagazine.com/chunky-monkey-8%C2%BE-rear-end-c...

and

https://www.hotrod.com/articles/mopp-1103-rebuilding-an-8-3-4/
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57chizler
Posted 2018-09-23 3:34 PM (#570626 - in reply to #570585)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



Expert

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Location: NorCal
This is the Yukon bearing puller I have, works on both pinion and carrier bearings. Kinda pricey for a one-time setup.



(Puller.jpg)



Attachments
----------------
Attachments Puller.jpg (101KB - 23 downloads)
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wizard
Posted 2018-09-23 3:40 PM (#570629 - in reply to #570575)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



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Actually, the 8-3/4 is not a complicated construction and easy to work with.

I've made some mounting beams for the differential carrier and the tool for the carrier bearing adjusters is not expensive.


A good bearing puller is a must if you plan to re-use the bearings
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60 dart
Posted 2018-09-23 7:05 PM (#570644 - in reply to #570575)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



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Posts: 8468
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Location: WHEELING,WV.>>>HOME OF WWVA
i got the parts needed coming , so for now it's waiting then gettin my motor back in first . got the balanced crank and all related parts
back saturday . on to ordering bearings --------------------------------------------------later
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mstrug
Posted 2018-09-23 7:11 PM (#570645 - in reply to #570575)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



Expert 5K+

Posts: 5642
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Location: Newark, Texas (Fort Worth)
Here is a good book too:

https://play.google.com/store/books/details?id=GAKJDgNooKQC&source=p...
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LD3 Greg
Posted 2018-09-23 10:58 PM (#570654 - in reply to #570575)
Subject: RE: 8 3/4 ring and pinion , suregrip remove and install


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Location: Ontario, Canada
60 dart - 2018-09-22 1:58 PM

anyone here that does their own? i'm going to give it a try!,,,,,,,,,, i think 3:73 !---------------------------------------------------later


I did mine and don't remember any problems. I did spend a day or two swapping axle ratios. I tried everything from the 2:93 to the 3:73 and settled with a 3:15 sure grip. I was really hoping that the 3:73 would work for me but it caused too much engine noise at cruising speeds to be comfortable. Even a 3:54 seemed to be too noisy. Both seemed to cause the TF to shift too fast and be annoying at legal speed driving.

Hey, whatever works for you but I am very happy with the 3:15. Great top end, lots of traction off the line and decent mileage! BTW, the sure grip really works and is very controllable cornering in snow. I tried it with my Regal!!

Greg
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BigBlockMopar
Posted 2018-09-24 3:42 AM (#570660 - in reply to #570575)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



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Anything above 3.23 is usually only suitable with an OD-transmission. Unless you only do city-driving or have a race-car, or pickup with large wheels.

I did my own gear swap years ago going from a 2.9 to 3.91:1.
Wasted a pinion bearing in the process because you have to take it off a few times to get the shimpackage correct.
(Now I would use the old bearing and hone it larger so it slides on for setting up the unit and only press on the new bearing last)
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60 dart
Posted 2018-09-24 4:16 PM (#570702 - in reply to #570575)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



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Posts: 8468
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Location: WHEELING,WV.>>>HOME OF WWVA
most of my driving will be in city with jaunts to the interstate in between . the 2.90 range is good for an automatic but its a 4 speed car . my setup is the same as a mid 60's 4 speed . with that usually came
3.23's or 3.55's but i'm thinkin 3.73's will suit me and my 4 speed better and especially my clutch . if not , the solution will be another set of gears of which i have a 3.23 , 742 factory set ----------------------------later
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60 dart
Posted 2018-09-24 4:34 PM (#570704 - in reply to #570575)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



Expert 5K+

Posts: 8468
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Location: WHEELING,WV.>>>HOME OF WWVA
i bought a cheap 5 ton legged puller , so wheel see how that goes --------------------------------------------------later
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57chizler
Posted 2018-09-25 5:07 PM (#570765 - in reply to #570704)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



Expert

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Location: NorCal
The problem with trying to pull pinion/carrier bearings with anything but a dedicated puller is that the puller usually bears on the bearing roller cage only and this can cause the cage to spread and pull off, ruining the bearing. The dedicated puller uses the bearing's race to keep the cage from spreading.
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Powerflite
Posted 2018-09-25 5:34 PM (#570767 - in reply to #570575)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



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When I did it, I had some trouble swapping the ring gear over. Remember that they are left hand thread, and it helps to heat the gear up before you put it onto or pull it off the carrier. But you have to be quick to get it on, because once it touches the carrier, it cools off pretty fast. If you are swapping a used sure grip from one set of gears to another, you can often get away with leaving the bearings alone. that makes it quite a bit easier.
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60 dart
Posted 2018-10-02 5:38 PM (#571066 - in reply to #570575)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



Expert 5K+

Posts: 8468
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Location: WHEELING,WV.>>>HOME OF WWVA
thanks guys ,,, from what i see and have read changing third member gears aint rocket science . the only tedious part i see is gettin the correct spacing on bearings/both and ring-pinion clearance . with
removing the rear bearing in good condition , doesn't seem to be really big either . a new rear lone bearing can be had for under 20$ to use after being honed to a test bearing . i'm just not seein why pigs
are so expensive to have done or buy rebuilt ,,,,,, but i'm also not the most brainy either -----------------------------------------------------later
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Shep
Posted 2018-10-03 7:43 AM (#571092 - in reply to #571066)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



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It can be time consuming getting the pinion preload correct if it is a shim type arrangement, same issue with tooth contact settings, a pinion depth gauge can help there. I can do them in my shop in about 3.5 hours, but this is with the proper tools. This does not include r and i or clean up time.
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60 dart
Posted 2018-10-03 3:47 PM (#571106 - in reply to #570575)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



Expert 5K+

Posts: 8468
5000200010001001001001002525
Location: WHEELING,WV.>>>HOME OF WWVA
has anyone though of maybe using a ratech mopar pinion gauge , RAT-10007 . seems easy to use , maybe too easy -----------------------------------------------------later

http://ratechmfg.com/pinion%20setting%20tool.htm
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Stroller
Posted 2018-10-13 1:40 PM (#571612 - in reply to #570575)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install


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The I love about the sure grips is they work!! I have 2 both are .354's. Thing is might be kinda hard now adays to take one to shop to be done right. Most of the old techs that knew them things now are either dead or retired. I do know a drive line shop I trust. Their interview process is having hopefulls take apart a limited slip and posi and put them back together, properly. Filters out the professional parts changers.
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59 in Calif
Posted 2018-10-16 4:27 PM (#571804 - in reply to #570575)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install


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Hey Chuck, I recently rebuilt the diff in wife's Dodge. Bearings got a little pricey. I used an old toaster oven to heat up the bearings and quickly dropped them in place. Use a good pair of gloves ! The toaster oven heats them up enough to swell them a bit so they drop right in place. No pounding or hammering them in place. Jerry
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kcasey
Posted 2018-10-16 8:43 PM (#571818 - in reply to #570575)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install


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Location: fulshear texas
I have rebuilt lots of third members. mostly fords and a few mopars. I cut the bearings with a cut off wheel. I carefully cut a deep groove at about a 45 degree angle and then bust the groove with a chisel and it cracks the bearing and then it slides right off. I do axle bearings the same way. sounds hard but to me it's easier than fussing with pullers that slip and what not. I use my press to install the new bearings.
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57chizler
Posted 2018-10-17 3:23 PM (#571872 - in reply to #571818)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



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Location: NorCal
Installing bearings by the heat method is well known as is the destructo removal but the process of setting up a ring & pinion often involves repeated removal/installation.
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60 dart
Posted 2018-10-20 4:28 AM (#572021 - in reply to #570575)
Subject: Re: 8 3/4 ring and pinion , suregrip remove and install



Expert 5K+

Posts: 8468
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Location: WHEELING,WV.>>>HOME OF WWVA
inside bearing cam right off with little effort with a clam puller and absolutely no damage . got old bearing is on the bench and waiting to be honed a bit more for a light slip fit . after @ 10mins. or so i'd
say it's half way to fit ----------------------------------------------------------later
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