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#1 |
Senior Member
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Location: Los Angeles
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'67-'72 GM Dana 60's
Do full-floating Dana 60 differentials in '67-'72 GM trucks all take 30 spline shafts?
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1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
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#2 |
Registered User
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Location: Deale Md
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Re: '67-'72 GM Dana 60's
To my knowledge yes GM D60 rear axle are 30 spline. My D60 rear axle in my 68 K20 is 30 spline.
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James 63 GMC V6 4speed carryall 65 chevy swb bbw V8 auto 68 K20 327/4 speed, buddy buckets 2002 GMC CC Dually Duramax 64 GMC lwb 3/4 V6 4speed SOLD 66 GMC swb bbw buddy buckets SOLD IG duallyjams The only thing that stays the same is constant change! |
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#3 |
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Re: '67-'72 GM Dana 60's
I don't have any experience with this other than my 71 gmc , but the Dana 60 in it has 30 spline axles.
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#4 |
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Re: '67-'72 GM Dana 60's
Thanks for the replys. Looking at getting a new Trac-Loc diff. and they come in different spline counts. 30 seems to be what all the older GM trucks used. Going to count mine just to be sure.
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1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
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#5 |
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Join Date: Nov 2013
Location: Inman S.C.
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Re: '67-'72 GM Dana 60's
Any reason you wouldn't go with a Detroit Truetrac instead?
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#6 |
Senior Member
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Re: '67-'72 GM Dana 60's
No real reason other than I can get a deal on a 30 spline Trac-Loc. Truck never goes off road, the V-6 makes 220 H.P. and about 340 ft. lbs of torque, and I think the Trac-Loc was OEM.
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1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
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#7 | |
Senior Member
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Location: Colfax-California
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Re: '67-'72 GM Dana 60's
Quote:
All I've ever seen in the 60s was a power-loc. The HO52 and 72 got a detroit as memory serves me. AND go with the Tru-trac as mentioned, you'll be happier in the long run |
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#8 |
Senior Member
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Re: '67-'72 GM Dana 60's
Thanks. Hearing a lot of good things about the True-Trac, I'll look into them. I am told they don't need friction modifier, that's a plus.
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1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
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#9 |
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Location: Mt Airy, MD
Posts: 85,858
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Re: '67-'72 GM Dana 60's
I really like the Tru-Trac. My experience has been with using in the front drive axle. I'm sure they are great in the rear. But I don't know any reason not to use the Trac-Loc if you've found a good deal on one.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#10 |
Registered User
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Location: Deale Md
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Re: '67-'72 GM Dana 60's
I just bought a power loc for my D60. Talked with some dodge guys and that's what they recommend.
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James 63 GMC V6 4speed carryall 65 chevy swb bbw V8 auto 68 K20 327/4 speed, buddy buckets 2002 GMC CC Dually Duramax 64 GMC lwb 3/4 V6 4speed SOLD 66 GMC swb bbw buddy buckets SOLD IG duallyjams The only thing that stays the same is constant change! |
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#11 |
Registered User
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Location: Jurupa Valley, Ca
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Re: '67-'72 GM Dana 60's
I was looking in to the tru-trac and doesn't seem to be available anywhere in the 4.10 and down ratio with 30 spline axles.
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Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC |
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#12 |
Senior Member
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Location: Colfax-California
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Re: '67-'72 GM Dana 60's
Tru trac Pn TT913A389
Availability might be another issue |
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