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Took my driveline to the specialty shop for modification to fit my gearvendors/8 1/4" SG drivetrain. Took the GV slip yoke and the bare driveline (spiders removed) and they rebuilt it to 35 1/2" C/C with new front tube yoke and two new HD u-joints installed and dynamically balanced as an...

I was going to build my 904 with a gearvendors and the transmission guy suggested a 1990 518/727 2 wire non lockup transmission he could build for me that would be better than a gearvendors unit. I did the search routine and couldn't determine if anyone has acutally done this change. Could use a...

Tried searching. It appears my ready-to-go 8 1/4 rear axle is a B-body unit. The spring perches will work fine for mounting but the backing plate to backing plate dimension is 2" +_ narrower than the old 7 1/4 unit I removed. Anyone have experience with this and will it work? TIA-------:coffee2:

Just picked up my rebuilt 8 1/4 from RR&P. Had built with 3.73 R & P & new Trac-Loc unit. I think the road RPM will be too high with my 904 transmission. Plan on 26" tall tires and the calculators show almost 3500 RPM @ 70 MPH. Now I am thinking what to do, AOD auto or 833 OD manual. Maybe just...

Attached is a photo of an A body 8 1/4 shur grip i bought on CL. I feel i have to have it checked out by a professional shop before installing it in my Barracuda. It is a little sharp on the outside of the ring gear which makes me nervous. Looking for input if this unit is worth putting any...

I have an 8 1/4 cone type shur grip complete rear end I bought on CL. The casting #'s on the case is #3723599, . I need to start buying parts for this unit and I want to make sure I am asking for the right stuff. In would like to buy a new back cover plate as the chrome aftermarket one does not...

My car has a 904 with 72,000 miles on it that worked perfectly when i tore the car down. I have built the 273 engine to 250/275 Hp and will be running an 8 1/4 locker with 3:21 gears. I am trying to decide on whether to try to find a local shop that knows what they are doing to recondition the...

I am thinking about rebuilding my own 904. It worked perfectly when I pulled it, I just want to freshen it and kit it to make it shift more positively. Mancini shows several kits. Looking for the book and some advice. TIA, Rat:rock:

I just bought an 8 1/4 complete A-Body rear end with SG. The seller tells me it is 48+ inches ID flange to flange and the 7 1/4 is 51+ inches ID flange to flange. There is only 1 1/8" clearance from my tire sidewall to the leaf spring. Am I going to have a tire to spring problem...

I decoded my 67 Cuda Vin# and it is a 273 2v with either 180hp or 235hp. How can I tell which. Also, What is the most likely automatic transmission in the car? If it helps, is is single exhaust with the floor console shifter and power steering. I need to decide whether to build the 273 or change...