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These shock plates are larger than the shock plates that I have on the 8.75 on the 68 Barracuda. The spacing on the U bolts is the same. I am going to be putting these up for sale and I don’t want to steer someone wrong on the application. 1) Are these truck or C body or maybe B body 8.75 shock...

Hello I recently installed a Dr Diff 3:55 gear set into the 742 carrier in the 68 Barracuda. Noticed a re occurring teaspoon size puddle of oil on the garage floor. Last evening I put the rear end up on jack stands to investigate. From the circular oil spray on the under body the leak is...

anyone have a part number for a 742 pinion seal that is rubber and not leather? I would also like it to have the OD lip flange The National 7216 is said to fit the 742 pinion and has the OD lip, but it also has a leather seal and is also $35.00 and change across the counter at the local auto...

in the midst of the R&P set up and looked at several videos that attempted to explain what to look for concerning the patterns. The link below is to the best video that I found; I thought it is a * short and easy explanation of how the pattern on the drive side and coast side interact * liked...

Hello, changing out a ring and pinion set in a 742 8.75. I believe the ring and pinion being removed is an OE set. Has Mopar part number and a manufacturing date of 1968 stamped in it. I recently went through this differential and put all new bearings in it. I plan to reuse the bearing with the...

I have Dr Diff axels with green bearing on the 68 Barracuda. Looking for replacement o rings for the green bearing I have found numerous internet threads where, when looking for those o rings the response was, ' just go to NAPA they have a bunch of Orings, just match up a set, or just go to your...

Put the 68B up on jackstands to get ready to do some under body work and to pull the differential to make a gear change and found oil on the inside rim of the L rear. Also then found a drop of gear oil on the outer axel flange. The axels were coming out anyway to be able to remove the diff, so...

I posted a pinion snubber for sale here at FABO, it is one that I had on my 68 Barracuda, 8.75 rear end,,,It is the clean black painted snubber. A potential buyer asked if it was for an A body,, I have another 8.75 diff that has a snubber on it, so I compared the two. See photo. The one I have...

I have a 1974 904 in the 68 Barracuda. On a few short drives the speedometer needle was jumpy so I decided to change out the OE speedometer cable. RockAuto has a Pioneer CA-3027 that is said to fit a 68 Barracuda for a little over $10.00 + shipping. When I got it, found the transmission...

I have the engine and 904 mounted together and out of that car and thought that would be a great opportunity to set the linkages. this is a mild race prepped 904 behind a naturally aspirated modified slant six with MPFI. using a GM 4.3 L throttle body, so things are not exactly stock. Using a...

Hello setting up to re assembled a 742 8.75 with a cone style sure grip. I have read many sites that recommend red loctite on the ring gear bolts. a few questions on that item 1) is red loctite really necessary since the ring gear bolts are left had threaded? 2) with red loctite on the ring...

Hello, built up the 742 diff in 2015, has 3:55 gears and a rebuilt cone sure grip Has probably 40 1/4 runs on it. When I put it together used all new bearings, was a used ring gear set. The only bad symptom is a bit of a gear groan on de-acceleration, I have read where that can be due to an...

this question relates to the steel shaft that passes through the differential gear carrier that retains the spider gear assembly.This is a non-sure grip rear. I had the rear diff cover off to service the fluid,, I turned the drive shaft by hand and noticed that the spider gears would 'rock'...

this is the info: 1) a fellow racer basically gave me a new torque converter 2) Midwest Converter, S/N 92100 3) The converter looks brand new, but the PO says he knows nothing about it 4) I called Midwest, they say they do not have records that go back that far,, from the S/N Midwest...

building up an 8.75,, right now the axel housing is empty,, no axels or center section in it, while it is that way I want to have the spring perches relocated to match up with off set spring hangers. I have read a couple of postes that the best way to relocate the perches to get the best...

I have the 742 center section / cone sure grip apart, bearings ordered, the cones out for machining on the ends.. I used a bearing splitter to get the carrier and pinion bearings off,, was thinking that I would take the pinion and sure grip sections to a local tranny shop to get the new...

got this cone sure grip unit in a 8.75 A body assembly that I purchased. The PO said he did not know much about it so I figured I would go through the cernter chunk to see what I got. disassembled the sure grip https://www.flickr.com/photos/13718356@N02/sets/72157648849620302/ the ends...

Ok, I picked up a couple of used / unknown 741 center sections, non posi ,,,one is a 2:73 the other is a 2:94 for 25.00 each,, so not much in them.. I called Dr Diff,, he can get 3:55 and 3:73 gears,, but they will require the fine 29 tooth yoke,, that is another 70.00 so thinking, maybe I...

when I install the 8 3/4 into this 68 barracuda, will I need matching shock plates or will the original ones that were with the 7 1/4 work? any reason to upgrade these? I'm believeing I will also need to pick up new u bolts,,, any thing else? thanks

when building up an axel assembly, when staying with the tapered bearings, are all of the required bolts, shims, retainers available?

saw the topic in the brake section of this forum on fitting Jeep Cherokee rear disks to a 8.25 rear, as I plan to replace the stock 7.25 on this 68 Barracuda with an 8.25, that looks to be the way to go. Found two Cherokee candidates in the local pull a part,, I don't have the 8.25 rear so...

Changing the filter in the 68 Barracuda / 904 transmission been to three local parts houses, at each the replacement filter does not match what was on the car now,, the three mounting holes line up, the original unit has 2 inlet openings,, the replacements have 1,,, the repalcement filters all...

Hello new to the A body forum and world,, found a nice 68 Barracuda, slant powered, plan to keep it that way, has the small 7.25 rear,, would like to go up to a 8.25,,, question is where would i find an 8.25 rear dif assembly that fits an A body,, lots of them in the local pull a parts in old...