9 inch open differential

[bn69stang]

I think your  SLR with the 4.00 will be fine Dave , it should make a big difference in leaving the line hard .. Bud

[Ratbird]

Hey Bud, thx a ton. I ordered the 4.00, 31 spline, nodular case, detroit locker. $850 includes free shipping from the east coast - not bad. I'll have to change out the yoke to my yoke. Mines a 1330 and this one comes with a 1350. From what I'm reading online you have to use a crush washer and have a really stout work bench to rig it to. I read of one guy that rigged up his truck trail hitch to do it. I may just take it to my local mechanic.

Do you know if the crush washer is an item I can get from any auto store? And are they all the same size etc? I have no experience with diffs.

I'm also going to get the axles from Dutchmans per BH107 - they're $380.

Thx again gents, regards, Dave J

[BH107]

Don't bother changing out the yoke, just get a 1330 to 1350 u-joint. It will save you the trouble of pulling the yoke and getting the crush set again.

[Ratbird]

I had no idea I could do that, thanks a ton BH107!

Dave

[Ratbird]

I haven't been able to find a 1330 - 1350 U-joint anywhere. Do any of you guys know where I can get them?

Dave J

[machoneman]

https://www.google.com/search?sourceid=navclient&aq=hts&oq=&ie=UTF-8&rlz=1T4GGHP_enUS533US533&q=1330+-+1350+U-joint

Try a NAPA store.

[Jim Comet]

google summit racing 1330 to 1350 ujoint. They show 3 joint part numbers. I went to clutch and ujoint service in the twin cities and they set me up with a HD version to this joint for my Comet.

[Dr Mabuse]

The Roush used 9" racing pig should come with a (shimmed) solid pinion bearing spacer. I can't imagine them using the standard crush spacer, but it would be best to call them and ask. A solid pinion spacer makes changing the yoke a simple R & R procedure.

[fe66comet]

I went the other way for now, I got a 1350 forged Strange yoke for my 9". I am not ready for the shaft until I get my Tremec bought and installed so I got a Strange 1350/1310 universal, hopefully the shaft is not too far off and I can cheat till my engine and trans is done. It was cheap too, 25 bucks for the universal, not bad for the good part.

[Ratbird]

Yeah, my local NAPA store has the 1330-1350 for $29.59. I won't be pulling the yoke. The pig arrived 2 days ago and looks awesome. Dutchman's will be starting on my axles today and should ship next week. It'll be fun to get that old T-bird a little sideways in the turns every once in a while.

sure appreciate all the input, especially Bud pointing me to Roush - Yates for the differential. $850 including shipping and tax for a complete pig, nodular housing, Daytona pinon support, billet yoke is way better than trading my open 3.89 and $705 for a standard case used Trac-loc.

Dave J

[bn69stang]

Your welcome Dave , glad it worked out keep in touch .. Bud

[fe66comet]

I had the Trac-loc in mine but went to the Detroit Locker. I have had a few and they always held up under the worst of torture. I cheaped out on the case and axles, I originally intended on a small block but with the 28 spline I can go to 600 ft pounds I am sure.

[bn69stang]

You would push 28 spline axles that hard , i don t think i would i replaced my mine with moser 31 spline and they re 30% stronger than ford 31 spline . To me you can never have to strong a drive train .. Bud

[BH107]

I had the Trac-loc in mine but went to the Detroit Locker. I have had a few and they always held up under the worst of torture. I cheaped out on the case and axles, I originally intended on a small block but with the 28 spline I can go to 600 ft pounds I am sure.

Are your 28 spline axles OEM? Either way I don't think I would push them that hard, I've heard of too many broken axles with much less HP than that.

[fe66comet]

Yeah I got 28 but I do not think my 445 will ever reach anywhere near 600 and I will not run slicks ever. I may later on upgrade to Currie forged axles but I think I will be ok for now. I have seen 8.8 rears take serious abuse in my day . I guess it breaks down to vehicle weight, tires and how hard you hit it. My truck has no rear weight, four link, a short box and my rpm limit is 6500 which I will never drop the clutch above 3000 rpm. I can only put so much to the ground and everyone says I will never see over 600 hp so I'll just leave it alone.