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08-15-2016, 08:31 PM
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#1 |
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Registered User
Join Date: Jun 2016
Location: American Canyon, CA
Posts: 253
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Gear box question
I ordered a 68 steering gear box from redhead, when I pulled the one that was on the truck, I couldn't install the new one. I measured the input shaft that goes to the rag joint and came up with 25/32" for the redhead unit. The one I pulled off was 1/16"smaller.
I'm waiting for a call back from redhead. They are looking into this issue. Anyone know what's going on here? This trucks been a puzzle trying to figure out lol. Slowly but surely. |
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08-16-2016, 10:42 AM
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#2 |
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Registered User
 
Join Date: Feb 2007
Location: Star Valley, WY
Posts: 2,038
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Re: Gear box question
Im in the middle of replacing mine right now with a Redhead box as well. The input shaft should be a 13/16" 36 spline. There was no difference between two and four wheel drive input shafts so I'm not sure what yours would have been for.
Do you have a way to snap some pics and post them here? Maybe getting someone's eyes on the box they will recognize what you have. steve
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Steve 1971 GMC Longbox. Full Roller Stroker 489 w/ FiTech EFI, Chris Straub Cam/NV4500/205/D60/14B w. Grizzly Locker and 4.11's. 2" Lift on 33's |
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08-16-2016, 02:06 PM
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#3 | |
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Registered User
Join Date: Jun 2016
Location: American Canyon, CA
Posts: 253
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Re: Gear box question
Quote:
     The two have same casting numbers including a 4 on one side and as well as the round bottom side. Thanks guys for any help. |
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08-16-2016, 04:08 PM
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#4 |
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Registered User
Join Date: Feb 2011
Location: Modesto, CA
Posts: 2,188
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Re: Gear box question
Very possible it is just a boxing error. What kind steering system (column and intermediate shaft) do you have?
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08-16-2016, 05:08 PM
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#5 |
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laying low
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,183
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Re: Gear box question
There are two input shaft sizes. A quick fix would be to buy the other coupler through your local parts store. I did.
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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08-16-2016, 05:24 PM
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#6 |
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The Older Generation
  
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,464
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Re: Gear box question
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I thought the smaller one was 1/2 ton and the bigger one was 3/4 ton.... Dunno LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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08-16-2016, 05:32 PM
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#7 |
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laying low
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,183
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Re: Gear box question
I believe the difference is the slow sector of the 72 back and the quicker sector of the 73 and later. I bought a sector for a 75 to get the quicker ratio over my 71 stock sector. Both 1/2 ton applications. I am talking about power sectors by the way.
Ghost you should turn your new sector and count the number of turns. Old box should have about 4turns lock to lock where as the newer sector should turn 3 turns lock to lock if thats what you have.
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross Last edited by Boog; 08-16-2016 at 05:39 PM. |
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08-17-2016, 08:44 PM
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#8 |
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Registered User
Join Date: Jun 2016
Location: American Canyon, CA
Posts: 253
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Re: Gear box question
Thanks for the replies guys!
Red head called me yesterday and was told that the smaller input shaft were used in later models (78? Forgot what year he said). They are sending me the correct one and a round trip label for the incorrect one. Great group of guys that take care of their customers. I'll check back in once new one arrives. |
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