Rear-end questions

[Joe334]

I just bought an 8 3/4 ( 741 case) the other day and got it tore apart today and it is without suregrip and has 2.76 gears. I was wondering if ring and pinion gears out of a 742 case would fit in a 741 case? Also, i am in need of a suregrip assembly, what is the going rate for these? And if anyone has one for sale? Also can they interchange between different rear-ends? Like maybe a suregrip out of a 8 1/4 fit into mine? From the way things are giong, it looks like i will have about $1,000 into this. Which isnt what i was hoping for.
Thanks,
Joe

 

[fishy68]

Sorry to tell you Joe but you can't use gears from a 742 case in your 741 case and a 8-1/4 SG unit won't work either. No gears from any case style will interchange. There is 2 styles of sure-grip units for the 8-3/4 and either will work in any case though. Your probably better off looking for a complete unit allready set up. I've seen them go for $350-600 depending on condition and parts used in them. Recently a buddy of mine had a rebuilt one for sale with 3:23 gears (I think) and I think he wanted $500 for it. Don't know if he still has it or not. If your interested I can check. He does top quality work.

 

['64 Cuda]

I know, I know.......... I spend way too much time checkin' out eBay, but here's a 3.91 sure-grip.

http://cgi.ebay.com/ebaymotors/ws/e...RK:MEWA:IT&viewitem=&item=120060600455&rd=1,1

He also says he's going to be listing a complete, drum to drum 8 3/4" with 3.23 sure-grip (he calls 'em posi's, must be a brand X guy) & sbp soon.

:burnout:

 

[Joe334]

i dont like buying stuff off ebay, i dont really trust any of those guys on there.

 

[dusterdon]

With a little shopping and keeping your ears open you should be able to find a decent pig. I paid $350 for the 4.10 in my duster. Try to stay away from the 741 cases unless you're just doing a cruiser. Look for either a 742 or 489. Either one will work. 3.55 or 3.91 gears are probably the highest demand, therefore the highest priced. good luck.

don

 

[340mopar]

741's are really under rated. They have the same pinion diameter as the 8.8 ford and the 12 bolt chevrolet so don't pass on one of it is a sure grip and the right ratio that you want. They are a lot tougher than we give them credit for. I ran one in my drag car for a season with no ill effects.

 

[Joe334]

Ya i already have it, and i doubt i can find a stronger case let alone one in my price range. Im not going to be drag racing this car, its just going to be a mild street car i suppose. All i have in this car is a 318 with some mild aftermarket parts.